This document discusses the management of facial and dental asymmetry. It defines asymmetry and outlines its prevalence in the general population and among orthodontic patients. Asymmetry can be caused by skeletal, functional, muscular, local dental factors or a combination. Diagnosis involves taking a thorough history and conducting examinations of the soft tissues, dentition, occlusion and skeletal structures to determine the underlying causes and classify the type of asymmetry present. Treatment aims to address the specific causes and may involve orthodontics, orthognathic surgery, or both to improve function, occlusion and aesthetics.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
This document discusses various methods and appliances for distalizing maxillary molars, including removable and fixed options. Removable appliances discussed include extraoral traction using headgear as well as removable appliances with finger springs or sliding jigs. Fixed appliances discussed include intramaxillary devices like Wilson's 3D appliance as well as intermaxillary appliances like Herbst or Jasper Jumper. Factors like the presence of second molars, skeletal pattern, and growth prognosis must be considered when determining whether molar distalization is indicated.
This document discusses natural head position (NHP) in cephalometric radiography. It outlines limitations of traditional reference planes like sella-nasion and discusses how NHP provides a more reproducible and clinically relevant orientation. NHP is defined as the small range of positions where the subject looks at a distant eye-level point with relaxed posture. Several methods are described for standardizing and measuring NHP, including the use of mirrors, fluid levels, and inclinometers. Maintaining NHP is important because variations can influence the appearance and measurements of craniofacial structures.
“The study of orthodontia is indissolubly connected with that of art as related to the human face.” -Dr. Edward H. Angle.
Each person shares with the rest of the population a great many characteristics, but there are enough differences to make each human being a unique individual. Such limitless variation in the size, shape and relationship of the dental, skeletal and soft tissue facial structures are important in providing each individual with his or her own identity.
Face – Difficult object to measure accurately because of
– complex morphology
– sensitivity to eyes
– its soft nature.
One of goals of orthodontic treatment is creating a balanced & harmonious facial appearance. Craniofacial symmetry is one of the aspect of this harmony. Subject of symmetry or lack of symmetry of human face has been of considerable interest, particularly in the field of Orthodontics. Minor variation is a desirable variation of craniofacial structure which is perceived as esthetically pleasing and has no esthetic or functional significance. Asymmetry becomes important when it affects the function or esthetics of the person.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
1. The document discusses features, etiology, and treatment of anterior open bite and deep bite. It describes skeletal, dental, soft tissue, and growth features of high and low angle cases.
2. Cephalometric measurements used to assess open bite and deep bite tendencies are described, including overbite depth indicator, Jarabak ratio, and UAFH-LAFH ratio.
3. Causes of open bite discussed include habits, enlarged adenoids, and posterior rotation of the mandible. Deep bite causes include class II skeletal pattern and anterior rotation of the mandible.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Success rate of miniplate anchorage for bone anchored maxillary protractionSaba Basit
(1) The study evaluated the success rate of using Bollard miniplates for bone anchored maxillary protraction (BAMP) in growing children, finding a 97% success rate. (2) Failures occurred in the youngest patients and were addressed by removing and replacing miniplates under local anesthesia. (3) The high success rate was related to presurgical counseling, minimal invasive surgery, good postsurgical instructions, and orthodontic follow-up.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
This document discusses various methods and appliances for distalizing maxillary molars, including removable and fixed options. Removable appliances discussed include extraoral traction using headgear as well as removable appliances with finger springs or sliding jigs. Fixed appliances discussed include intramaxillary devices like Wilson's 3D appliance as well as intermaxillary appliances like Herbst or Jasper Jumper. Factors like the presence of second molars, skeletal pattern, and growth prognosis must be considered when determining whether molar distalization is indicated.
This document discusses natural head position (NHP) in cephalometric radiography. It outlines limitations of traditional reference planes like sella-nasion and discusses how NHP provides a more reproducible and clinically relevant orientation. NHP is defined as the small range of positions where the subject looks at a distant eye-level point with relaxed posture. Several methods are described for standardizing and measuring NHP, including the use of mirrors, fluid levels, and inclinometers. Maintaining NHP is important because variations can influence the appearance and measurements of craniofacial structures.
“The study of orthodontia is indissolubly connected with that of art as related to the human face.” -Dr. Edward H. Angle.
Each person shares with the rest of the population a great many characteristics, but there are enough differences to make each human being a unique individual. Such limitless variation in the size, shape and relationship of the dental, skeletal and soft tissue facial structures are important in providing each individual with his or her own identity.
Face – Difficult object to measure accurately because of
– complex morphology
– sensitivity to eyes
– its soft nature.
One of goals of orthodontic treatment is creating a balanced & harmonious facial appearance. Craniofacial symmetry is one of the aspect of this harmony. Subject of symmetry or lack of symmetry of human face has been of considerable interest, particularly in the field of Orthodontics. Minor variation is a desirable variation of craniofacial structure which is perceived as esthetically pleasing and has no esthetic or functional significance. Asymmetry becomes important when it affects the function or esthetics of the person.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
1. The document discusses features, etiology, and treatment of anterior open bite and deep bite. It describes skeletal, dental, soft tissue, and growth features of high and low angle cases.
2. Cephalometric measurements used to assess open bite and deep bite tendencies are described, including overbite depth indicator, Jarabak ratio, and UAFH-LAFH ratio.
3. Causes of open bite discussed include habits, enlarged adenoids, and posterior rotation of the mandible. Deep bite causes include class II skeletal pattern and anterior rotation of the mandible.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Success rate of miniplate anchorage for bone anchored maxillary protractionSaba Basit
(1) The study evaluated the success rate of using Bollard miniplates for bone anchored maxillary protraction (BAMP) in growing children, finding a 97% success rate. (2) Failures occurred in the youngest patients and were addressed by removing and replacing miniplates under local anesthesia. (3) The high success rate was related to presurgical counseling, minimal invasive surgery, good postsurgical instructions, and orthodontic follow-up.
Schwarz analysis divides the evaluation into craniometry (skeletal) and gnathometry (dental) using reference lines and planes. Craniometry assesses the skeletal base and profile using angles like J angle, F angle, and TMJ position. Gnathometry evaluates the dentition using angles like B angle, gonial angle, and axial tooth inclinations. Linear measurements include anterior cranial base, ascending ramus, maxillary base, and soft tissue thickness. The analysis provides metrics to assess the skull, jaws, dentition, and facial profile.
This document discusses the management of transverse discrepancies including crossbites and maxillary expansion. It begins with definitions of key terms and discusses the prevalence, etiology, diagnosis, and classification of posterior crossbites. Treatment options are provided for different crossbite classifications. The rationale, indications, contraindications, effects, and complications of maxillary expansion (RME) are outlined. Various appliances and techniques for rapid and slow maxillary expansion are described. Factors determining the appropriate type and technique of expansion are also discussed.
This document discusses factors to consider in determining whether extractions are needed for borderline orthodontic cases. It outlines various dental measurements like dental discrepancy, curve of Spee, and irregularity index that help assess the need for extraction. It also discusses cephalometric measurements of the jaws, teeth positions and soft tissue profiles. The effects of extractions versus non-extraction treatments on achieving functional occlusion and facial esthetics are weighed. Formulas are presented to aid extraction decisions for Class III borderline cases. The conclusion emphasizes that experience, proper malocclusion correction, facial aesthetics and stability must all be considered, not just dental spacing alone.
The document discusses key concepts in occlusion and orthodontics including ideal occlusion, malocclusion, static and functional occlusion. It describes Andrews' six keys of ideal occlusion and Roth's six keys of functional occlusion. The importance of functional tooth contacts is discussed along with types of articulators used in orthodontics and their indications.
Torque in pre adjusted e.w.a /certified fixed orthodontic courses by Indian...Indian dental academy
The Indian Dental Academy is the Leader in
continuing dental education , training dentists
in all aspects of dentistry and offering a wide
range of dental certified courses in different
formats.
Indian dental academy provides dental crown &
Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit
www.indiandentalacademy.com ,or call
0091-9248678078
The document discusses the history and evolution of fixed orthodontic appliances, leading to the development of the pre-adjusted edgewise appliance. It describes Lawrence Andrews' research which identified six keys to optimal occlusion based on measurements of untreated dental casts. His studies found that traditional edgewise appliances did not achieve optimal occlusion in most treated cases. This led to the concept of a fully programmed pre-adjusted edgewise appliance that would incorporate his findings on natural tooth morphology and positioning.
Pendulum appliance 2 /certified fixed orthodontic courses by Indian dental ac...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
A magnet (from Greek μαγνήτης λίθος, "Magnesian stone") is a material or object that produces a magnetic field .This magnetic field is invisible and causes the most notable property of a magnet a force that pulls on nearby magnetic materials, or attracts or repels other magnets.
Magnets attract specific metals, and they have north and south poles. Opposite poles attract each other while like poles repel.
This document discusses the 14 Keys to Case Management in orthodontic treatment using the Pitts approach. It focuses on three main areas: 1) Using SAP (Smile Arc Protection) bracket positioning to control vertical incisor position and esthetics early in treatment. 2) Selecting archwire progressions to control axial inclinations early. 3) Utilizing PRACM (read and react milestones) to refine esthetics and occlusion. The document emphasizes that optimal esthetic and occlusal results are achieved through careful case management regardless of the appliances used.
This document discusses several potential iatrogenic effects of orthodontic treatment, including:
- Tissue damage such as enamel demineralization, which can lead to white spot lesions on teeth, as well as enamel fractures. Preventive measures like fluoride application and oral hygiene maintenance are important.
- Periodontal problems such as gingival recession and alveolar bone loss. Incidence of these issues can be reduced through proper oral hygiene and non-traumatic orthodontic techniques.
- Root resorption caused by excessive orthodontic forces. It is important to identify risk factors and use lighter forces to help prevent this problem.
- Pulp damage from trauma to teeth.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
This document describes Dr. Duane Grummons' posteroanterior (PA) cephalometric analysis for evaluating facial asymmetry. The analysis involves constructing reference lines and planes to compare bilateral landmarks and structures. Measurements are made of linear distances, angles, ratios and volumetric comparisons. The comprehensive analysis evaluates multiple structures and parameters while the summary analysis focuses on key dental and skeletal factors. The analysis is useful for orthodontic-surgical treatment planning to determine the extent and location of asymmetries and surgical corrections needed.
This document discusses utility arches, which are orthodontic appliances used to apply light forces in the dental arch. It provides details on:
- The historical background and development of utility arches based on biomechanical principles.
- Common wire dimensions and materials used, including stainless steel, nickel titanium, and beta titanium alloys.
- The standard design components of utility arches, including molar, vertical, and incisal segments.
- Different types of utility arches like passive arches, intrusion arches, and retraction/protrusion arches and how they are activated to apply specific orthodontic forces.
The document discusses bracket variations that can be used to optimize tooth positioning for different malocclusion types. Specifically, it describes how inverting the bracket on an upper lateral incisor that is palatally displaced can provide beneficial labial root torque to help align the crown and root. Inverting the bracket changes the torque prescription from +10 degrees to -10 degrees, facilitating labial movement of the root during treatment. Careful selection and positioning of brackets can simplify treatment of localized anomalies.
This document discusses various techniques for intruding teeth in orthodontics. It begins by defining intrusion and describing how it differs from other tooth movements like tipping. Deep overbites can be corrected through intrusion of anterior teeth or other movements. The principles of intrusion mechanics include applying light continuous forces through the center of resistance and using devices that create statically determinate force systems. Various intrusion appliances are described, including utility arches, tipback springs, continuous and segmented intrusion arches. Key biomechanical concepts for intrusion like controlling reactive forces and avoiding extrusion are also summarized.
The document summarizes the Royal London Space Planning approach for orthodontic treatment planning. The approach involves assessing six factors that impact the space required for treatment: crowding, occlusal curves, arch width, incisor positioning, tooth angulation, and tooth inclination. Scores are recorded for each factor to quantify the overall space needed. The approach aims to ensure a systematic treatment plan, determine if objectives are achievable, anticipate anchorage issues, and improve informed consent.
Functional & ceph analysis for functional appliance /certified fixed ortho...Indian dental academy
This document discusses the functional analysis that is performed for functional appliance treatment planning. It begins by explaining the importance of functional examination due to the dynamic basis of functional appliance therapy. There are three main aspects examined: the postural rest position and maximum intercuspation, the temporomandibular joint, and orofacial dysfunction including swallowing, tongue posture, and speech. Methods for examining the relationship between the rest position and habitual occlusion in the sagittal, vertical, and transverse planes are outlined. The document provides details on the evaluation process and implications for diagnosing and treating different malocclusion classifications.
The document provides information about the MBT bracket system. Some key points:
- MBT was developed by Dr. Richard McLaughlin, Dr. John Bennett, and Dr. Hugo Trevisi to address limitations of previous pre-adjusted edgewise appliances.
- MBT utilizes light, continuous forces with sliding mechanics principles. Torque is incorporated fully into the bracket bases.
- Bracket tip and torque specifications are designed to achieve ideal tooth positions and occlusion. Canine torque values were modified from original straight wire appliance prescriptions.
- MBT treatment philosophy emphasizes accuracy of bracket placement, group tooth movement, anchorage control, and awareness of tooth size discrepancies.
This document contains information about Holdaway's soft tissue analysis. It lists various soft tissue landmarks and measurements used to analyze the facial profile, including the facial angle, nose prominence, lip thickness, H-angle, and chin thickness. The table compares the patient's measurements to normal ranges and indicates inferences, such as a slightly retrognathic lower jaw and increased upper lip thickness. An ideal facial profile according to Holdaway is described, with measurements within normal ranges and no lip strain on closure. The document sources are listed as papers by Holdaway and Athanasiou on soft tissue cephalometric analysis.
- The ForsusTM FRD is a flexible fixed functional appliance developed by Bill Vogt in 2001 that can be used with a fixed pre-adjusted Edgewise appliance.
- It consists of spring modules, push rods of varying lengths, split crimps, and a measurement gauge.
- The ForsusTM is recommended for Class II cases where patients did not cooperate with class II elastics, and is planned from the beginning of treatment.
This document discusses Class II and Class III subdivision malocclusions. It describes two types of Class II subdivisions - Type 1 where the mandibular midline is deviated and Type 2 where the maxillary midline is deviated. Treatment depends on the type and severity of crowding but may involve single or multiple premolar extractions or interarch mechanics. Class III subdivisions can be treated similarly though studies are lacking, and extraction of a mandibular incisor is another option. Early intervention can address asymmetries from early tooth loss or crossbites.
This document discusses the benefits of orthodontic treatment. It outlines 7 main benefits: 1) psychological benefits such as improved self-esteem, 2) improved masticatory efficiency, 3) improved speech, 4) prevention or cure of temporomandibular joint dysfunction, 5) interceptive benefits such as preventing trauma, 6) dental health benefits like increased resistance to caries and periodontal disease, and 7) being an adjunct to other dental treatments. The summary at the end synthesizes several key studies that evaluated these benefits and the evidence regarding their effectiveness.
Schwarz analysis divides the evaluation into craniometry (skeletal) and gnathometry (dental) using reference lines and planes. Craniometry assesses the skeletal base and profile using angles like J angle, F angle, and TMJ position. Gnathometry evaluates the dentition using angles like B angle, gonial angle, and axial tooth inclinations. Linear measurements include anterior cranial base, ascending ramus, maxillary base, and soft tissue thickness. The analysis provides metrics to assess the skull, jaws, dentition, and facial profile.
This document discusses the management of transverse discrepancies including crossbites and maxillary expansion. It begins with definitions of key terms and discusses the prevalence, etiology, diagnosis, and classification of posterior crossbites. Treatment options are provided for different crossbite classifications. The rationale, indications, contraindications, effects, and complications of maxillary expansion (RME) are outlined. Various appliances and techniques for rapid and slow maxillary expansion are described. Factors determining the appropriate type and technique of expansion are also discussed.
This document discusses factors to consider in determining whether extractions are needed for borderline orthodontic cases. It outlines various dental measurements like dental discrepancy, curve of Spee, and irregularity index that help assess the need for extraction. It also discusses cephalometric measurements of the jaws, teeth positions and soft tissue profiles. The effects of extractions versus non-extraction treatments on achieving functional occlusion and facial esthetics are weighed. Formulas are presented to aid extraction decisions for Class III borderline cases. The conclusion emphasizes that experience, proper malocclusion correction, facial aesthetics and stability must all be considered, not just dental spacing alone.
The document discusses key concepts in occlusion and orthodontics including ideal occlusion, malocclusion, static and functional occlusion. It describes Andrews' six keys of ideal occlusion and Roth's six keys of functional occlusion. The importance of functional tooth contacts is discussed along with types of articulators used in orthodontics and their indications.
Torque in pre adjusted e.w.a /certified fixed orthodontic courses by Indian...Indian dental academy
The Indian Dental Academy is the Leader in
continuing dental education , training dentists
in all aspects of dentistry and offering a wide
range of dental certified courses in different
formats.
Indian dental academy provides dental crown &
Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit
www.indiandentalacademy.com ,or call
0091-9248678078
The document discusses the history and evolution of fixed orthodontic appliances, leading to the development of the pre-adjusted edgewise appliance. It describes Lawrence Andrews' research which identified six keys to optimal occlusion based on measurements of untreated dental casts. His studies found that traditional edgewise appliances did not achieve optimal occlusion in most treated cases. This led to the concept of a fully programmed pre-adjusted edgewise appliance that would incorporate his findings on natural tooth morphology and positioning.
Pendulum appliance 2 /certified fixed orthodontic courses by Indian dental ac...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
A magnet (from Greek μαγνήτης λίθος, "Magnesian stone") is a material or object that produces a magnetic field .This magnetic field is invisible and causes the most notable property of a magnet a force that pulls on nearby magnetic materials, or attracts or repels other magnets.
Magnets attract specific metals, and they have north and south poles. Opposite poles attract each other while like poles repel.
This document discusses the 14 Keys to Case Management in orthodontic treatment using the Pitts approach. It focuses on three main areas: 1) Using SAP (Smile Arc Protection) bracket positioning to control vertical incisor position and esthetics early in treatment. 2) Selecting archwire progressions to control axial inclinations early. 3) Utilizing PRACM (read and react milestones) to refine esthetics and occlusion. The document emphasizes that optimal esthetic and occlusal results are achieved through careful case management regardless of the appliances used.
This document discusses several potential iatrogenic effects of orthodontic treatment, including:
- Tissue damage such as enamel demineralization, which can lead to white spot lesions on teeth, as well as enamel fractures. Preventive measures like fluoride application and oral hygiene maintenance are important.
- Periodontal problems such as gingival recession and alveolar bone loss. Incidence of these issues can be reduced through proper oral hygiene and non-traumatic orthodontic techniques.
- Root resorption caused by excessive orthodontic forces. It is important to identify risk factors and use lighter forces to help prevent this problem.
- Pulp damage from trauma to teeth.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
This document describes Dr. Duane Grummons' posteroanterior (PA) cephalometric analysis for evaluating facial asymmetry. The analysis involves constructing reference lines and planes to compare bilateral landmarks and structures. Measurements are made of linear distances, angles, ratios and volumetric comparisons. The comprehensive analysis evaluates multiple structures and parameters while the summary analysis focuses on key dental and skeletal factors. The analysis is useful for orthodontic-surgical treatment planning to determine the extent and location of asymmetries and surgical corrections needed.
This document discusses utility arches, which are orthodontic appliances used to apply light forces in the dental arch. It provides details on:
- The historical background and development of utility arches based on biomechanical principles.
- Common wire dimensions and materials used, including stainless steel, nickel titanium, and beta titanium alloys.
- The standard design components of utility arches, including molar, vertical, and incisal segments.
- Different types of utility arches like passive arches, intrusion arches, and retraction/protrusion arches and how they are activated to apply specific orthodontic forces.
The document discusses bracket variations that can be used to optimize tooth positioning for different malocclusion types. Specifically, it describes how inverting the bracket on an upper lateral incisor that is palatally displaced can provide beneficial labial root torque to help align the crown and root. Inverting the bracket changes the torque prescription from +10 degrees to -10 degrees, facilitating labial movement of the root during treatment. Careful selection and positioning of brackets can simplify treatment of localized anomalies.
This document discusses various techniques for intruding teeth in orthodontics. It begins by defining intrusion and describing how it differs from other tooth movements like tipping. Deep overbites can be corrected through intrusion of anterior teeth or other movements. The principles of intrusion mechanics include applying light continuous forces through the center of resistance and using devices that create statically determinate force systems. Various intrusion appliances are described, including utility arches, tipback springs, continuous and segmented intrusion arches. Key biomechanical concepts for intrusion like controlling reactive forces and avoiding extrusion are also summarized.
The document summarizes the Royal London Space Planning approach for orthodontic treatment planning. The approach involves assessing six factors that impact the space required for treatment: crowding, occlusal curves, arch width, incisor positioning, tooth angulation, and tooth inclination. Scores are recorded for each factor to quantify the overall space needed. The approach aims to ensure a systematic treatment plan, determine if objectives are achievable, anticipate anchorage issues, and improve informed consent.
Functional & ceph analysis for functional appliance /certified fixed ortho...Indian dental academy
This document discusses the functional analysis that is performed for functional appliance treatment planning. It begins by explaining the importance of functional examination due to the dynamic basis of functional appliance therapy. There are three main aspects examined: the postural rest position and maximum intercuspation, the temporomandibular joint, and orofacial dysfunction including swallowing, tongue posture, and speech. Methods for examining the relationship between the rest position and habitual occlusion in the sagittal, vertical, and transverse planes are outlined. The document provides details on the evaluation process and implications for diagnosing and treating different malocclusion classifications.
The document provides information about the MBT bracket system. Some key points:
- MBT was developed by Dr. Richard McLaughlin, Dr. John Bennett, and Dr. Hugo Trevisi to address limitations of previous pre-adjusted edgewise appliances.
- MBT utilizes light, continuous forces with sliding mechanics principles. Torque is incorporated fully into the bracket bases.
- Bracket tip and torque specifications are designed to achieve ideal tooth positions and occlusion. Canine torque values were modified from original straight wire appliance prescriptions.
- MBT treatment philosophy emphasizes accuracy of bracket placement, group tooth movement, anchorage control, and awareness of tooth size discrepancies.
This document contains information about Holdaway's soft tissue analysis. It lists various soft tissue landmarks and measurements used to analyze the facial profile, including the facial angle, nose prominence, lip thickness, H-angle, and chin thickness. The table compares the patient's measurements to normal ranges and indicates inferences, such as a slightly retrognathic lower jaw and increased upper lip thickness. An ideal facial profile according to Holdaway is described, with measurements within normal ranges and no lip strain on closure. The document sources are listed as papers by Holdaway and Athanasiou on soft tissue cephalometric analysis.
- The ForsusTM FRD is a flexible fixed functional appliance developed by Bill Vogt in 2001 that can be used with a fixed pre-adjusted Edgewise appliance.
- It consists of spring modules, push rods of varying lengths, split crimps, and a measurement gauge.
- The ForsusTM is recommended for Class II cases where patients did not cooperate with class II elastics, and is planned from the beginning of treatment.
This document discusses Class II and Class III subdivision malocclusions. It describes two types of Class II subdivisions - Type 1 where the mandibular midline is deviated and Type 2 where the maxillary midline is deviated. Treatment depends on the type and severity of crowding but may involve single or multiple premolar extractions or interarch mechanics. Class III subdivisions can be treated similarly though studies are lacking, and extraction of a mandibular incisor is another option. Early intervention can address asymmetries from early tooth loss or crossbites.
This document discusses the benefits of orthodontic treatment. It outlines 7 main benefits: 1) psychological benefits such as improved self-esteem, 2) improved masticatory efficiency, 3) improved speech, 4) prevention or cure of temporomandibular joint dysfunction, 5) interceptive benefits such as preventing trauma, 6) dental health benefits like increased resistance to caries and periodontal disease, and 7) being an adjunct to other dental treatments. The summary at the end synthesizes several key studies that evaluated these benefits and the evidence regarding their effectiveness.
This document discusses the aetiology of malocclusion. It states that malocclusion can be caused by both genetic and environmental factors. Genetic factors that may influence malocclusion include homeobox genes, growth factors, and genes related to specific dental anomalies. Evidence for a genetic role comes from twin studies and familial occurrences of certain malocclusions. Environmental factors like soft tissues, habits, and local dental factors can also influence malocclusion development. The interaction between genetics and environment determines the phenotype.
1. The document discusses anterior open bite and high angle cases, defining dental and skeletal open bites. It covers etiology including transitional factors, skeletal factors like genetics and trauma, soft tissue factors like muscles and adenoid size, and habits like digit sucking.
2. Treatment options are discussed ranging from myofunctional therapy and extraoral traction to fixed appliances, molar intrusion, repelling magnets, and orthognathic surgery. Stability, relapse prevention, and difficulties in treatment are also addressed.
3. Key predictors of open bite like Bjork's structural signs, Jarabak ratio, UAFH-LAFH ratio, and decreased overbite depth indicator are summarized. Character
This document discusses Class II Division 2 malocclusion. Key points:
- Class II Division 2 is characterized by retroclined upper incisors and a retropositioned lower first molar. The overjet is usually minimal but may be increased.
- It has a prevalence of 1.5-17.7% and is highly associated with impacted canines.
- The etiology involves genetic and environmental factors like soft tissue pressures retroclining the upper incisors.
- Treatment aims to correct the skeletal and dental relationships, overbite, and achieve a functional occlusion. Options include growth modification, fixed appliances, orthognathic surgery, or a combination. Anchorage is
The document discusses arch form and width in orthodontic treatment. It defines arch form as the shape formed by the buccal and facial surfaces of teeth when viewed from above. Factors like ethnicity, malocclusion type, musculature, environment, and treatment influence arch form. Implications of arch form for treatment include aesthetics, periodontal health, treatment planning, mechanics, and stability. Common arch forms described include Bonwill-Hawley, catenary curve, Brader ellipse, conic sections, Andrews, and individualized forms. Arch width changes naturally with growth but appliances can stably expand the arch to a limited degree depending on factors like age and extractions.
Arch Form in orthodontics /certified fixed orthodontic courses by Indian dent...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
1. Bimaxillary proclination is a malocclusion where the maxillary and mandibular incisors are positioned forward in relation to their dental bases.
2. It is most common in Afro-Caribbean and some Asian populations and can be caused by skeletal, soft tissue, dental, or habitual factors.
3. Treatment depends on the severity and may include space creation through extraction or alignment and retraction of the incisors using techniques like temporary anchorage devices. Stability of results can be challenging.
This document defines orthodontic anchorage (OA) and discusses its early understanding and assessment. It describes factors that influence anchorage demand and different classifications of OA. Theories of optimal force levels and differential anchorage are explained. Various methods to reinforce anchorage are outlined, including using compound anchorage units, anchor bends, tipping and uprighting teeth, extraoral anchorage, and musculature forces. The evidence for the differential force theory is discussed.
Class III malocclusion is characterized by the mandible being positioned forward in relation to the maxilla. It can be due to maxillary deficiency, mandibular excess, or a combination. Treatment depends on the patient's age, skeletal maturity, and severity of the malocclusion. Early treatment options include a face mask or chin cup to guide growth, while later options include dental camouflage if mild or orthognathic surgery if more severe. Careful monitoring of mandibular growth is important for determining the best long-term treatment approach.
This document discusses biomechanics in orthodontics. It covers physical variables like Newton's laws of motion and terminology used in orthodontics such as vectors, forces, moments, and centers of resistance and rotation. It also discusses forces related variables including magnitude and direction of forces, root surface area, duration of forces, and how drugs can affect the response to orthodontic forces. The relationship between force magnitude, duration, and type of tooth movement is explained. Maintaining an optimal force leads to more efficient movement while excessive forces can damage tissues.
This document provides an overview of adult orthodontics. It discusses special considerations for orthodontic treatment in adults, including medical history, psychological factors, lack of growth, and periodontal disease. It also describes recent advances in adult orthodontics, such as ceramic brackets, lingual appliances, and Invisalign, which aim to improve aesthetics. The document is a reference list for adult orthodontics written by Mohammed Almuzian at the University of Glasgow in 2013.
This document provides an overview of extraoral orthodontic appliances. It defines extraoral appliances as those that apply forces from an external source. The document then summarizes the main types of extraoral appliances - headgear with facebow, J hook facebow, asymmetric headgear, and combinations with functional appliances. It also briefly outlines the history, uses, and studies on the effects of headgear, including dental and skeletal effects.
This document discusses the orthodontic management of hypodontia, which is tooth agenesis excluding third molars. It begins by defining hypodontia and classifying it based on the number of missing teeth and inheritance patterns. It then discusses the prevalence of hypodontia based on factors like ethnicity, gender, tooth type, and location. The etiology and clinical presentation are described. Management involves a multidisciplinary team and factors like age, severity, facial profile, and dental relationships are considered. Treatment options include space opening/closure and different appliances used. Challenges in treatment and restoration options to replace missing teeth are also covered.
The document discusses impacted maxillary canines, including:
- Unerupted canines is a common clinical problem, with prevalence ranging from 0.8-2.8%.
- Normal development involves calcification starting at age 1 and eruption around 11-12 years old.
- Factors that can cause impaction include crowding, prolonged retention of primary canines, abnormal position of tooth buds, and genetic factors.
- Diagnosis involves inspection for delayed/asymmetric eruption, palpation of buds, and diagnostic imaging to determine location, development stage, and other anatomical details of unerupted canines.
This document contains a diagnostic summary, clinical examination, radiographic findings, problem list, treatment aims and objectives, cephalometric interpretation, and treatment plan for an orthodontic patient. Key details include that the patient presented with a Class I incisor relationship on a Class II skeletal base with vertical proportions. Clinical findings show good oral hygiene and tooth quality with no pathology. The treatment plan is to use a functional appliance to improve the skeletal relationship, followed by fixed appliances to detail the occlusion. Retention will involve upper and lower retainers.
This document discusses Class 2 Division 1 malocclusion. Key points include:
- It has a prevalence of 27% and is characterized by a distal relationship between the maxillary and mandibular teeth.
- Treatment options include orthodontic camouflage using appliances like upper removable appliances, functional appliances to modify growth, or orthognathic surgery.
- The choice of treatment depends on factors like the patient's age, skeletal pattern, dental development, soft tissue profile, and compliance. Camouflage is generally considered for mild cases, while surgery is used for more severe skeletal discrepancies.
- Outcomes and stability vary depending on the treatment approach and individual patient factors. Early intervention
1. The document describes the Begg orthodontic appliance and treatment methodology. It discusses the history and philosophy of Begg, the features of the appliance, and outlines the objectives and mechanics of the three stages of Begg treatment.
2. Stage I focuses on intra-arch alignment and leveling as well as overcorrection of overbite and overjet. Light class II elastics are used. Stage II aims to maintain stage I results while closing extraction spaces and correcting dental asymmetries using heavier elastics.
3. Stage III involves uprighting and torquing springs to correct tipping and torque. Uprighting springs may be needed to prevent opening of extraction spaces during torqueing. Finishing
This document discusses different types of tooth extractions performed in orthodontic treatment. It begins by explaining the history of extractions from Angle's philosophy of non-extraction to Tweed and Begg incorporating extractions. Evidence is presented on the effects of extractions on factors like profile, smile width, vertical dimension, and relapse. Types of extractions covered include lower incisors, upper incisors, canines, premolars, and molars. Serial extractions are defined as the timed extraction of primary and secondary teeth to interceptively manage crowding. Factors affecting extraction decisions and guidelines for different malocclusion types are also summarized.
This document discusses the orthodontic management of deep overbites. It begins with definitions and classifications of overbites. It then covers the prevalence, aetiology, indications for treatment, and principles of overbite reduction. Various treatment methods are described in detail, including removable appliances, fixed appliances, functional appliances, and auxiliary devices. Factors to consider for treatment method selection and mechanics for overbite reduction are also outlined. The document provides a comprehensive overview of deep overbite orthodontic management.
This document discusses management of facial and dental asymmetry. It defines asymmetry and provides prevalence statistics, noting most people have mild asymmetry and orthodontists can detect smaller deviations than laypeople. Causes of asymmetry are classified as skeletal, functional, muscular, local dental factors, or combinations. Diagnosis involves examination of the structures involved. Treatment depends on the underlying structures affected and may include orthodontics, orthognathic surgery, or functional appliances to correct skeletal, dental, or muscular asymmetries.
This document defines and discusses supernumerary teeth. Supernumerary teeth are any teeth that develop in addition to the normal 32 teeth. They occur most commonly in the maxilla and are often associated with conditions like Down syndrome. Supernumerary teeth can be classified based on their shape and location. Complications include delayed or prevented eruption of adjacent teeth. Management depends on factors like the patient's age, position of the supernumerary tooth, and its effects. Options include monitoring, extraction with or without orthodontics, and exposing unerupted teeth.
This document discusses factors related to retention, stability, and relapse following orthodontic treatment. It defines relapse as unfavorable changes from the final tooth position after treatment. Retention aims to resist physiological relapse as tissues remodel, growth relapse, and true relapse due to inherently unstable tooth positions. Risk factors for relapse include the original malocclusion, such as a Class II div 2 bite or anterior open bite. Other factors are incisor retraction if tongue thrusting is present, intercanine expansion, and extraction spaces in adults. Stability is improved by maintaining the arch form and lower incisor position during treatment. Retention should continue until growth ceases for skeletal discrepancies and consider prolonged retention for lower inc
Class I malocclusion is defined as when the lower incisors occlude directly beneath the upper incisors with an overjet of 2-3mm. It is one of the most common malocclusions, affecting 44-50% of populations. Treatment may involve addressing traits like crowding, crossbites, deep bites, spacing issues, and impacted or missing teeth. Treatment approaches can include extractions, interproximal reduction, arch expansion, orthodontic appliances, and sometimes orthognathic surgery. The goal of treatment is to relieve crowding, achieve normal overjet and overbite, align and level teeth, and detail the occlusion.
Facial trauma is without doubt a most challenging area within the specialty of oral and maxillofacial surgery. Trauma with all its aspects has great importance, being the main cause of morbidity and mortality with rising frequency worldwide, especially in recent decades. Traumatic facial injuries are often associated with high mortality and varying degrees of physical, functional, psychological damage, cosmetic disfigurement, and concomitant injuries to other organs that may be added complicating factors. Road traffic accidents represent the main cause of facial trauma. According to WHO, Egypt leads the Middle East when it comes to road accidents, with an average of 12,000 people killed annually. Interpersonal violence is the second most prevalent etiologic factor. Our society is progressively becoming more and more violent and impatient, perhaps due to overcrowding, so the frequency of patients reporting in emergency with facial bones fracture is increasing.
During the last three decades, significant advances have occurred in the methods of fixation used for facial bone fractures, resulting in improved functional and aesthetic outcomes. Surgical techniques have been moving away from delayed closed reduction with internal wires suspension to early open reduction and internal plate fixation. The transition from wire osteosynthesis to rigid internal fixation in facial bone fractures using different micro or mini-plates and screw systems is regarded as one of the greatest advances in the field of maxillofacial surgery. I hope this book reflects the latest trends, concepts and innovations in the care of patients with facial trauma.
For convenience, the text is divided into 3 sections. Section 1 deals with primary care of the patients. Section 2 is concerned with midface fractures. In section 3 management of trauma to the lower face is discussed. Upper face injuries are not included and the reader could find the subject elsewhere under the topic of craniofacial traumatology. From the basic to the most complex, readers will find that each chapter is sequentially organized to provide a concise, and practical description of the operative details. The goal was to provide the reader with a fully comprehensive, yet highly illustrated text on the subject of facial trauma.
This document discusses four dental anomalies:
1. Dens in dent is a developmental anomaly where the enamel organ invaginates into the dental papilla. It can increase risks of caries, pulpal pathosis, and difficult endodontic treatment.
2. Macrodontia is when teeth are abnormally large. It can cause aesthetic and orthodontic problems. Treatment may include stripping, reshaping, or extraction.
3. Natal teeth are present at birth due to premature development, while neonatal teeth erupt within 30 days of birth. They are usually extracted to prevent complications.
4. Neonatal and natal teeth have several potential complications but are usually managed conservatively or through extraction with prec
This document discusses maxillary midline diastemas and frenums. It notes that diastemas occur in 6% of the population generally and are more common in males, Black individuals, and younger people. Diastemas can be caused by normal development, abnormal frenal attachments, microdontia, supernumeraries, abnormal tooth shapes, habits, trauma, heredity, and rare pathological migration. Diagnostic features of prominent labial frenums include visibility between central incisors, blanching with tension, and notching on radiographs. Treatment depends on the cause but may include aesthetic buildups, orthodontics using appliances like URA and FA, frenectomy, and long-term
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
This document discusses Molar-Incisor Hypomineralization (MIH), a condition characterized by hypomineralized enamel in first molars and often incisors. It defines MIH and describes its clinical features, diagnosis, classification, and differential diagnosis. The document notes that MIH molars experience rapid decay and difficulty with anesthesia and restorations. It causes tooth sensitivity and issues during brushing for children. The prevalence of MIH ranges from 3.6-25% depending on location. Potential causes include respiratory infections, perinatal complications, dioxins, and childhood illnesses. Treatments include preventing decay, applying desensitizing agents, sealants, restorations, and sometimes extra
This document discusses Molar-Incisor Hypomineralization (MIH), a condition characterized by hypomineralized enamel in first molars and often incisors. It defines MIH and describes its clinical features, diagnosis, classification, and differential diagnosis. The document notes that MIH molars experience rapid decay and difficulty with anesthesia and restorations. It causes tooth sensitivity and pain in children. While the cause of MIH is unclear, potential factors discussed include respiratory infections, perinatal complications, dioxins, and childhood illnesses. The document recommends preventive treatments like fluoride and restorations, and considers extraction if prognosis is poor.
This document provides information on the management of deviated midlines. It begins by defining different types of midline deviations, including dental, functional, skeletal and soft tissue midlines. It then discusses various etiological factors that can cause midline deviations, such as genetics, dental abnormalities, trauma and habits. The document outlines methods for diagnosing midline deviations, including clinical examination, photographs, study casts, and radiographs. It describes several analyses used in radiographic evaluation, such as Rickett's and Grummons analyses. Finally, the document discusses different approaches to managing deviated midlines, such as occlusal equilibration, expanding narrow arches, and using elastics to correct skeletal asymmetries.
This document discusses lower labial segment crowding, including its definition, incidence, classification, risk factors, and etiological factors. It notes that late crowding of the mandibular incisors is common in adolescence and adulthood. The risk factors include excess overjet/overbite, vertical growth pattern, tooth size discrepancies, compromised dentition, and prior orthodontic treatment. Potential causes include lack of attrition, soft tissue maturation, growth remodeling, occlusal forces, and third molar impacts. The document reviews evidence on different treatment options and retention methods to address lower incisor crowding.
This document discusses mandibular fractures, including:
- Mandibular fractures are the second most common maxillofacial fracture due to blows being transmitted directly to the skull.
- Fractures can be classified based on site and tendency to displace. Clinical features include pain, swelling, tooth mobility, and altered occlusion.
- Treatment involves debridement, reduction, fixation, and immobilization. Closed treatment uses intermaxillary fixation while open treatment uses internal fixation techniques like miniplates. Factors like fracture pattern and patient health determine the approach.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
IER, or interproximal enamel reduction, involves reducing the mesial-distal width of teeth by removing interproximal enamel in controlled increments. It is used for several orthodontic purposes, including improving microaesthetics and smile appearance, correcting dental midlines, creating additional space, addressing Bolton's discrepancies, and as an adjunct to clear aligner treatment. IER can also be performed prior to taking impressions for retainers to address minor crowding or relapses. Long-term, IER may assist with post-treatment stability by reproximating teeth to minimize future crowding as the arch size decreases.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
This document provides guidelines for clinical facial analysis (CFA) for orthodontists and maxillofacial surgeons. It details the steps and assessments involved in CFA from both frontal and profile views. Key areas examined include facial type, vertical heights, symmetry, skeletal bases, lip assessments, smile analysis, and dental factors. CFA is used to diagnose and classify dentofacial deformities, plan appropriate treatment, and predict outcomes. It should be performed at initial examination and precedes intraoral examination while the patient is in natural head position.
1. The document outlines Dr. Mohammed Almuzian's process for orthodontic diagnosis, which involves gathering information from the patient's medical history, dental history, clinical examination, and diagnostic records.
2. The clinical examination includes assessing the patient's facial profile, smile, dental alignment, occlusion, and temporomandibular joint from frontal, lateral, and intraoral views.
3. Diagnostic records like dental casts, radiographs, and photographs are evaluated to aid in diagnosis, treatment planning, monitoring treatment, and for legal and teaching purposes. Storage of records for at least 11 years is recommended.
This document discusses the management of deviated midlines. It notes that differential diagnosis is important to determine the cause of the midline deviation and appropriate treatment. Treatment may involve correcting dental asymmetries through orthodontics or expanding a narrow maxillary arch first if caused by a posterior crossbite. Functional appliances can be used to shift the mandible into the proper position if a skeletal deviation is present. Surgical correction may be needed for true skeletal asymmetries. The goal is to adapt the occlusion and correct dental or facial asymmetries causing the deviated midline.
Similar to Asymmetry (dental and skeletal) / for orthodontists by Almuzian (20)
This document provides an overview of the book "Planets of Orthodontics Volume 2: Diagnosis and Treatment Planning" which covers topics related to orthodontic diagnosis and treatment planning. It lists the authors and contributors to the book and provides information on the book's contents, preface, and table of contents. The table of contents indicates that the book will cover topics such as facial and smile analysis, imaging techniques in orthodontics, cephalometric analysis, and diagnosis and treatment planning. It aims to answer questions about various aspects of orthodontics through aggregating knowledge from experienced orthodontists.
This document provides an overview of the book "Planets of Orthodontics Volume III: Biomechanics and Tooth Movement". It lists the authors and contributors to the book. The preface states that the book aims to answer questions covering the breadth and depth of orthodontics. It will cover topics related to tooth movement and biomechanics. The table of contents provides an outline of the chapters to be included.
Orthodontic treatment provides several benefits, though some claims lack strong evidence:
1. It can improve self-esteem in patients with Class II malocclusions in the short-term, but does not affect long-term psychological well-being.
2. While it may improve mastication in open bite cases, compensation occurs in most malocclusions without functional issues.
3. It can help speech issues related to specific traits, but cannot ensure resolution without speech therapy.
4. It does not reduce TMD risk or symptoms, though may temporarily relieve symptoms during treatment.
5. Interceptive treatment can prevent trauma and loss of primary teeth but does not necessarily reduce trauma risk.
6.
This document provides an overview of orthodontic appliances and includes the following key points:
1. It describes different types of fixed appliances used in orthodontics including metal brackets, self-ligating brackets, and aesthetic brackets. It also discusses removable appliances, clear aligner therapy, and extraoral appliances.
2. Components and characteristics of common orthodontic appliances are defined, such as types of bracket bases and configurations. Appliance indications, advantages, and limitations are outlined.
3. The document is intended as a reference for orthodontic trainees and includes chapters on specific appliances like the Begg appliance, removable appliances, clear aligners, headgear, and facemasks. Each chapter provides a brief overview
This document provides an overview of craniofacial development from embryology through growth and development of the dentition and occlusion. It is authored by several specialists in orthodontics and contains 13 chapters on topics ranging from embryology and prenatal development to theories of craniofacial growth and anomalies affecting tooth and bone development. The goal is to establish the essential components of orthodontics by covering growth, development and research foundations. It acknowledges contributors and aims to answer questions across the breadth of orthodontics.
This one sentence document provides a link to up-to-date orthodontic notes created by Almuzian. Clicking the link will access Almuzian's Orthodontic Notes hosted on the orthodonticacademy.co.uk domain.
Surgically assisted rapid maxillary expansion (SARME) is a surgical technique used to widen the maxilla. It involves performing corticotomies through the zygomatic buttress and releasing other resistant structures like the midpalatal suture and pterygoid plates. An expander is placed preoperatively and activated starting 5 days post-op at 0.5mm/day. SARME allows for greater expansion than orthodontics alone and has better stability than segmental osteotomies. It is used to treat transverse deficiencies over 5mm and failed orthodontic expansion in adults. Risks include periodontal damage, root damage, and nasal complications.
1. There are several methods for predicting outcomes of orthognathic surgery, including manual tracings, computer programs, and 3D modeling.
2. Accuracy of prediction varies depending on the method and software used, with 3D modeling generally providing the most accurate predictions but manual methods still common.
3. Studies have found most software to be reasonably accurate for hard tissue predictions but with more variability for soft tissues like lips and less ability to account for individual patient differences.
This document discusses psychological assessment of patients undergoing orthognathic surgery. It notes that all patients should be assessed by a psychologist to evaluate their motives and determine if surgical goals are realistic. It also discusses body dysmorphic disorder, noting that some patients have a distorted body image and unrealistic expectations about how surgery can change their appearance. The document provides criteria for diagnosing body dysmorphic disorder and recommends that surgery only be considered if there is a physical defect and the patient receives psychological support. It offers guidance for surgeons on how to approach patients showing signs of body dysmorphic disorder.
This document discusses effective communication with orthognathic patients regarding their diagnosis and treatment options. It is important to discuss the patient's case outside of their presence using clear language and involve the patient in discussions. Providing information through multiple methods like verbal, written and audiovisual aids can help patients better understand and retain information about their often complex treatment. Clinicians must clearly explain the patient's diagnosis, what may happen without treatment, and available treatment options with benefits and risks to gain informed consent.
This document summarizes distraction osteogenesis (DO), which is a process where new bone is formed between bone segments that are gradually separated. DO involves three phases: a latency phase, distraction phase where the bone is slowly separated, and consolidation phase where the new bone mineralizes. It discusses the history and applications of DO, including for lengthening of long bones and the mandible. Key advantages are that it allows for larger movements than traditional bone grafts and avoids prolonged fixation. Potential complications include non-compliance, pain, premature consolidation, and neurological damage.
Treacher Collins Syndrome (TCS) is a rare genetic disorder characterized by deformities of the face, eyes, ears and jaw. It is caused by mutations in the TCOF1 gene. Clinical features include downward slanting eyes, ear abnormalities, cleft palate and a recessed chin. Treatment involves surgery to reconstruct facial structures and manage airway issues in infancy. Further reconstructive surgeries are often needed as the child grows. Prognosis is good with treatment, though facial differences typically remain.
In 1976, Paul Tessier published a classification system for facial clefts based on their anatomical position. The Tessier classification system categorizes 15 types of clefts into four groups: midline clefts, paramedian clefts, orbital clefts, and lateral clefts. It describes clefts at both the soft tissue and bone levels. The midline clefts run vertically along the facial midline, the paramedian clefts are similar but further from the midline, the orbital clefts involve the orbit, and the lateral clefts run horizontally on the face. The classification system provides a standardized way to describe different types of facial clefts.
1. Solitary Median Maxillary Central Incisor Syndrome (SMMCI) is characterized by the presence of a single tooth in the middle of the upper jaw where two central incisors would normally be.
2. Diagnostic criteria for SMMCI include a solitary central incisor tooth in the maxilla, a V-shaped palate, nasal obstruction in over 90% of cases, and potential issues like cleft lip/palate or holoprosencephaly.
3. Management of SMMCI involves treating any nasal airway issues at birth, regular dental care, and eventual orthodontic treatment to make space for an artificial tooth on one side during permanent dentition.
Pierre Robin Sequence (PRS) is a rare condition characterized by the triad of micrognathia, glossoptosis, and cleft palate. It occurs due to restricted growth of the mandible in utero, which causes the tongue to obstruct palatal fusion and the airway. Management requires a multidisciplinary approach and may include interventions like nasopharyngeal intubation, mandibular advancement, or tracheostomy to address airway and feeding issues. Long term care involves monitoring for catch-up mandibular growth and treating dentofacial abnormalities, with some studies finding persistence of mandibular deficiencies in PRS versus isolated cleft palate. Genetic assessment is also important as PR
Parry–Romberg syndrome (PRS) is a rare developmental disorder characterized by the progressive shrinking of tissues on one side of the face. It typically begins with a patch of hardened skin on the forehead that leads to an indentation resembling a sword wound on the affected side of the face. In addition to facial atrophy, it can cause neurological and eye problems. While the cause is unknown, genetic and autoimmune factors may play a role. Treatment aims to stop further progression and repair facial deformities through immunosuppressants or reconstructive procedures once stabilization is achieved.
Oro-facial-digital syndromes are a rare group of genetic disorders that affect around 1 in 50,000 people and have similar features. They are caused by mutations in different genes and are classified into eight types. Common signs include digital anomalies of the hands and feet, facial abnormalities such as frontal bossing and wide-set eyes, and oral features like cleft lip and high arched palate.
This document discusses four neuro-cutaneous syndromes:
1. Hypomelanosis of Ito, which causes pigmentation abnormalities and limb/facial asymmetry. Management involves tissue expansion and reconstruction.
2. Tuberous sclerosis, a genetic disease causing benign tumors in organs. Symptoms include seizures and intellectual disability.
3. Neurofibromatosis type 1 causes tumors along nerves and skin abnormalities. Symptoms include café au lait spots and neurofibromas.
4. Encephalotrigeminal angiomatosis is not genetic but a vascular development anomaly causing facial angiomas and cerebral calcifications.
Nager syndrome is similar to HFM but also includes preaxial limb anomalies such as hypoplastic or aplastic thumbs and radial hypoplasia. It also involves agenesis of the soft palate, known as the "sign post" sign, as well as ear defects and TMJ ankyloses.
Marfan syndrome is a genetic disorder of connective tissue that affects the heart, eyes, bones and other tissues. It is caused by mutations in the FBN1 gene and is inherited in an autosomal dominant pattern. Diagnosis is based on the Ghent criteria, which looks for major and minor clinical features in different organ systems. Common signs and symptoms include elongated limbs, scoliosis, eye problems like retinal detachment, heart issues like mitral valve prolapse and aortic aneurysm, and skeletal issues like joint hypermobility and pain. While there is no cure, treatment focuses on managing heart and eye complications through medication and surgery.
BBB and BCF
control the entry of compounds into the brain and
regulate brain homeostasis.
restricts access to brain cells of blood–borne compounds and
facilitates nutrients essential for normal metabolism to reach brain cells
Storyboard on Acne-Innovative Learning-M. pharm. (2nd sem.) CosmeticsMuskanShingari
Acne is a common skin condition that occurs when hair follicles become clogged with oil and dead skin cells. It typically manifests as pimples, blackheads, or whiteheads, often on the face, chest, shoulders, or back. Acne can range from mild to severe and may cause emotional distress and scarring in some cases.
**Causes:**
1. **Excess Oil Production:** Hormonal changes during adolescence or certain times in adulthood can increase sebum (oil) production, leading to clogged pores.
2. **Clogged Pores:** When dead skin cells and oil block hair follicles, bacteria (usually Propionibacterium acnes) can thrive, causing inflammation and acne lesions.
3. **Hormonal Factors:** Fluctuations in hormone levels, such as during puberty, menstrual cycles, pregnancy, or certain medical conditions, can contribute to acne.
4. **Genetics:** A family history of acne can increase the likelihood of developing the condition.
**Types of Acne:**
- **Whiteheads:** Closed plugged pores.
- **Blackheads:** Open plugged pores with a dark surface.
- **Papules:** Small red, tender bumps.
- **Pustules:** Pimples with pus at their tips.
- **Nodules:** Large, solid, painful lumps beneath the surface.
- **Cysts:** Painful, pus-filled lumps beneath the surface that can cause scarring.
**Treatment:**
Treatment depends on the severity and type of acne but may include:
- **Topical Treatments:** Such as benzoyl peroxide, salicylic acid, or retinoids to reduce bacteria and unclog pores.
- **Oral Medications:** Antibiotics or oral contraceptives for hormonal acne.
- **Procedures:** Such as chemical peels, extraction of comedones, or light therapy for more severe cases.
**Prevention and Management:**
- **Cleanse:** Regularly wash skin with a gentle cleanser.
- **Moisturize:** Use non-comedogenic moisturizers to keep skin hydrated without clogging pores.
- **Avoid Irritants:** Such as harsh cosmetics or excessive scrubbing.
- **Sun Protection:** Use sunscreen to prevent exacerbation of acne scars and inflammation.
Acne treatment can take time, and consistency in skincare routines and treatments is crucial. Consulting a dermatologist can help tailor a treatment plan that suits individual needs and reduces the risk of scarring or long-term skin damage.
Can Traditional Chinese Medicine Treat Blocked Fallopian Tubes.pptxFFragrant
There are many traditional Chinese medicine therapies to treat blocked fallopian tubes. And herbal medicine Fuyan Pill is one of the more effective choices.
Giloy in Ayurveda - Classical Categorization and SynonymsPlanet Ayurveda
Giloy, also known as Guduchi or Amrita in classical Ayurvedic texts, is a revered herb renowned for its myriad health benefits. It is categorized as a Rasayana, meaning it has rejuvenating properties that enhance vitality and longevity. Giloy is celebrated for its ability to boost the immune system, detoxify the body, and promote overall wellness. Its anti-inflammatory, antipyretic, and antioxidant properties make it a staple in managing conditions like fever, diabetes, and stress. The versatility and efficacy of Giloy in supporting health naturally highlight its importance in Ayurveda. At Planet Ayurveda, we provide a comprehensive range of health services and 100% herbal supplements that harness the power of natural ingredients like Giloy. Our products are globally available and affordable, ensuring that everyone can benefit from the ancient wisdom of Ayurveda. If you or your loved ones are dealing with health issues, contact Planet Ayurveda at 01725214040 to book an online video consultation with our professional doctors. Let us help you achieve optimal health and wellness naturally.
PGx Analysis in VarSeq: A User’s PerspectiveGolden Helix
Since our release of the PGx capabilities in VarSeq, we’ve had a few months to gather some insights from various use cases. Some users approach PGx workflows by means of array genotyping or what seems to be a growing trend of adding the star allele calling to the existing NGS pipeline for whole genome data. Luckily, both approaches are supported with the VarSeq software platform. The genotyping method being used will also dictate what the scope of the tertiary analysis will be. For example, are your PGx reports a standalone pipeline or would your lab’s goal be to handle a dual-purpose workflow and report on PGx + Diagnostic findings.
The purpose of this webcast is to:
Discuss and demonstrate the approaches with array and NGS genotyping methods for star allele calling to prep for downstream analysis.
Following genotyping, explore alternative tertiary workflow concepts in VarSeq to handle PGx reporting.
Moreover, we will include insights users will need to consider when validating their PGx workflow for all possible star alleles and options you have for automating your PGx analysis for large number of samples. Please join us for a session dedicated to the application of star allele genotyping and subsequent PGx workflows in our VarSeq software.
Breast cancer: Post menopausal endocrine therapyDr. Sumit KUMAR
Breast cancer in postmenopausal women with hormone receptor-positive (HR+) status is a common and complex condition that necessitates a multifaceted approach to management. HR+ breast cancer means that the cancer cells grow in response to hormones such as estrogen and progesterone. This subtype is prevalent among postmenopausal women and typically exhibits a more indolent course compared to other forms of breast cancer, which allows for a variety of treatment options.
Diagnosis and Staging
The diagnosis of HR+ breast cancer begins with clinical evaluation, imaging, and biopsy. Imaging modalities such as mammography, ultrasound, and MRI help in assessing the extent of the disease. Histopathological examination and immunohistochemical staining of the biopsy sample confirm the diagnosis and hormone receptor status by identifying the presence of estrogen receptors (ER) and progesterone receptors (PR) on the tumor cells.
Staging involves determining the size of the tumor (T), the involvement of regional lymph nodes (N), and the presence of distant metastasis (M). The American Joint Committee on Cancer (AJCC) staging system is commonly used. Accurate staging is critical as it guides treatment decisions.
Treatment Options
Endocrine Therapy
Endocrine therapy is the cornerstone of treatment for HR+ breast cancer in postmenopausal women. The primary goal is to reduce the levels of estrogen or block its effects on cancer cells. Commonly used agents include:
Selective Estrogen Receptor Modulators (SERMs): Tamoxifen is a SERM that binds to estrogen receptors, blocking estrogen from stimulating breast cancer cells. It is effective but may have side effects such as increased risk of endometrial cancer and thromboembolic events.
Aromatase Inhibitors (AIs): These drugs, including anastrozole, letrozole, and exemestane, lower estrogen levels by inhibiting the aromatase enzyme, which converts androgens to estrogen in peripheral tissues. AIs are generally preferred in postmenopausal women due to their efficacy and safety profile compared to tamoxifen.
Selective Estrogen Receptor Downregulators (SERDs): Fulvestrant is a SERD that degrades estrogen receptors and is used in cases where resistance to other endocrine therapies develops.
Combination Therapies
Combining endocrine therapy with other treatments enhances efficacy. Examples include:
Endocrine Therapy with CDK4/6 Inhibitors: Palbociclib, ribociclib, and abemaciclib are CDK4/6 inhibitors that, when combined with endocrine therapy, significantly improve progression-free survival in advanced HR+ breast cancer.
Endocrine Therapy with mTOR Inhibitors: Everolimus, an mTOR inhibitor, can be added to endocrine therapy for patients who have developed resistance to aromatase inhibitors.
Chemotherapy
Chemotherapy is generally reserved for patients with high-risk features, such as large tumor size, high-grade histology, or extensive lymph node involvement. Regimens often include anthracyclines and taxanes.
The biomechanics of running involves the study of the mechanical principles underlying running movements. It includes the analysis of the running gait cycle, which consists of the stance phase (foot contact to push-off) and the swing phase (foot lift-off to next contact). Key aspects include kinematics (joint angles and movements, stride length and frequency) and kinetics (forces involved in running, including ground reaction and muscle forces). Understanding these factors helps in improving running performance, optimizing technique, and preventing injuries.
Discover the benefits of homeopathic medicine for irregular periods with our guide on 5 common remedies. Learn how these natural treatments can help regulate menstrual cycles and improve overall menstrual health.
Visit Us: https://drdeepikashomeopathy.com/service/irregular-periods-treatment/
STUDIES IN SUPPORT OF SPECIAL POPULATIONS: GERIATRICS E7shruti jagirdar
Unit 4: MRA 103T Regulatory affairs
This guideline is directed principally toward new Molecular Entities that are
likely to have significant use in the elderly, either because the disease intended
to be treated is characteristically a disease of aging ( e.g., Alzheimer's disease) or
because the population to be treated is known to include substantial numbers of
geriatric patients (e.g., hypertension).
Osvaldo Bernardo Muchanga-GASTROINTESTINAL INFECTIONS AND GASTRITIS-2024.pdfOsvaldo Bernardo Muchanga
GASTROINTESTINAL INFECTIONS AND GASTRITIS
Osvaldo Bernardo Muchanga
Gastrointestinal Infections
GASTROINTESTINAL INFECTIONS result from the ingestion of pathogens that cause infections at the level of this tract, generally being transmitted by food, water and hands contaminated by microorganisms such as E. coli, Salmonella, Shigella, Vibrio cholerae, Campylobacter, Staphylococcus, Rotavirus among others that are generally contained in feces, thus configuring a FECAL-ORAL type of transmission.
Among the factors that lead to the occurrence of gastrointestinal infections are the hygienic and sanitary deficiencies that characterize our markets and other places where raw or cooked food is sold, poor environmental sanitation in communities, deficiencies in water treatment (or in the process of its plumbing), risky hygienic-sanitary habits (not washing hands after major and/or minor needs), among others.
These are generally consequences (signs and symptoms) resulting from gastrointestinal infections: diarrhea, vomiting, fever and malaise, among others.
The treatment consists of replacing lost liquids and electrolytes (drinking drinking water and other recommended liquids, including consumption of juicy fruits such as papayas, apples, pears, among others that contain water in their composition).
To prevent this, it is necessary to promote health education, improve the hygienic-sanitary conditions of markets and communities in general as a way of promoting, preserving and prolonging PUBLIC HEALTH.
Gastritis and Gastric Health
Gastric Health is one of the most relevant concerns in human health, with gastrointestinal infections being among the main illnesses that affect humans.
Among gastric problems, we have GASTRITIS AND GASTRIC ULCERS as the main public health problems. Gastritis and gastric ulcers normally result from inflammation and corrosion of the walls of the stomach (gastric mucosa) and are generally associated (caused) by the bacterium Helicobacter pylor, which, according to the literature, this bacterium settles on these walls (of the stomach) and starts to release urease that ends up altering the normal pH of the stomach (acid), which leads to inflammation and corrosion of the mucous membranes and consequent gastritis or ulcers, respectively.
In addition to bacterial infections, gastritis and gastric ulcers are associated with several factors, with emphasis on prolonged fasting, chemical substances including drugs, alcohol, foods with strong seasonings including chilli, which ends up causing inflammation of the stomach walls and/or corrosion. of the same, resulting in the appearance of wounds and consequent gastritis or ulcers, respectively.
Among patients with gastritis and/or ulcers, one of the dilemmas is associated with the foods to consume in order to minimize the sensation of pain and discomfort.
Nutritional deficiency Disorder are problems in india.
It is very important to learn about Indian child's nutritional parameters as well the Disease related to alteration in their Nutrition.
The Children are very vulnerable to get affected with respiratory disease.
In our country, the respiratory Disease conditions are consider as major cause for mortality and Morbidity in Child.
2. Table of Contents
Definition .....................................................................................................................................................4
Prevalence ...................................................................................................................................................4
Aetiology and classification..........................................................................................................................6
The local factors of asymmetry can also be divided into..............................................................................9
Diagnosis......................................................................................................................................................9
Class II and Class III Subdivisions................................................................................................................15
Types of Class II Subdivisions......................................................................................................................15
Early intervention.......................................................................................................................................16
Types of Class III Subdivisions.....................................................................................................................16
Treatment of asymmetry ...........................................................................................................................16
Treatment of asymmetry............................................................................................................................17
Treatment of dental asymmetries..............................................................................................................18
Treatment mechanics.................................................................................................................................20
I.Upper incorrect to facial midline......................................................................................................20
II.Lower incorrect, without mandibular shift and without skeletal asymmetry..................................20
III.Lower incorrect, without mandibular shift but with skeletal asymmetry.......................................20
IV.Lower incorrect, with mandibular shift. ........................................................................................20
V.Bimaxillary to the same side............................................................................................................20
VI.Bimaxillary to opposite sides..........................................................................................................21
Functional asymmetry................................................................................................................................21
Skeletal asymmetry....................................................................................................................................21
Indication..............................................................................................................................................23
Advantages...........................................................................................................................................23
Soft tissue asymmetry................................................................................................................................25
Mohammed Almuzian Page 2
3. Hemimandibualr elongation.......................................................................................................................25
Hemimandibualr hypertrophy ...................................................................................................................27
Hemifacial Hypertrophy.......................................................................................................................29
Condylar hypoplasia...................................................................................................................................29
Similar to hemimandibualr hyperatrophy but with significant antigonial notch........................................29
Condylar ankylosis......................................................................................................................................29
Limited mouth opening (Trismus) ..............................................................................................................29
Presentation of Ankylosis...........................................................................................................................30
Diagnosis of for ankylosed TMJ .................................................................................................................31
Treatment Choices ....................................................................................................................................31
Surgical Approach and preparation ...........................................................................................................32
Complications ............................................................................................................................................33
Summary of the evidences.........................................................................................................................33
Mohammed Almuzian Page 3
4. Facial & dental asymmetry
Definition
Symmetry defined as equality in form of parts distributed around a centre or an axis (Stedman’s
medical Dictionary) while asymmetry defined as dissimilarity of parts on either side of a straight
line or plane, or about a centre or axis.
Prevalence
In general population
• Most people have an asymmetry in the face and dentition, but it is usually mild. (Shah and Joshi,
1978)
• Vig & Hewitt (1975) showed an overall asymmetry present in most of the 36% of children in
their study, with the left side being larger.
• No significant gender difference found (Melnik, 1991).
• Here was a 90% chance that the deviation was to the left
• The mandible and the dentoalveolar region exhibited the greatest degree of symmetry this is
because the growth of the mandible takes the longest period of growth.
• History of trauma was found in only 14% of patients with asymmetry.
• Burden 1999 showed that 56% of the lay person and 83% of the orthodontist can recognize 2mm
ML discrepancy.
• A recent systematic review (Jason 2011) of smile attractiveness concluded that a limit of 2.2 mm
of midline deviation is considered acceptable.
• Kokich (1993) has suggested that if the line that forms the contact between the two central
incisors is perpendicular to the incisal plane and parallel to the long axis of the individual’s face,
Mohammed Almuzian Page 4
5. then the midline discrepancy seems to be camouflaged. When the midline is being corrected, a
cant or skew of the arch could result, or the anterior teeth may tilt. So how far can the midline tilt
before it is considered unacceptable? Orthodontists are generally more discerning than
laypersons, with roughly 70% of orthodontists and 40% of laypersons finding a 10-degree tilt
unacceptable (Thomas 2008)
• Sheats 1998 (US) 12% facial asymmetry and 21% non-coincidence of dental midlines. Among
orthodontic patients, the most common asymmetry trait was mandibular midline deviation from
the facial midline. This occurred in 62% of patients, followed, in descending order of frequency,
by lack of dental midline coincidence (46%, maxillary midline deviation from the facial midline
(39%), molar classification asymmetry (22%), maxillary occlusal asymmetry (20%), mandibular
occlusal asymmetry (18%), facial asymmetry (6%), chin deviation (4%), and nose deviation
(3%).
In orthognathic patients: (Sarver and Proffit 1996)
• 25% of class II have asymmetry
• 40% of class III have asymmetry.
• 26% of orthognathic cases have facial asymmetry (Proffit, 1996) and 60% of them with
asymmetry in the lower face and 80% of them have chin deviation. The midface (primarily the
nose) also was affected in about 30% of the asymmetric patients
Mohammed Almuzian Page 5
6. Aetiology and classification
It can be classified according to the structures involved:
1. Skeletal
2. Dental
3. Muscular
4. Functional
5. Combination
Another classification from Bishara 1994 et al and Chai et al 2008
I. Skeletal factors
II. Functional mandibular deviations
III. Muscular factors
IV. Local dental factors
V. Combinations
In details
A. Skeletal factors
Mohammed Almuzian Page 6
7. B. Functional mandibular deviations
1. In occlusion:
Constricted maxillary arch or malposed tooth causes premature contact in CR leading to
deviation into CO
2. In opening
• Due to anterior disc derangement that result in mandibular deviation when the condyle
translate from hinge to translation movement
• Eagle mouth syndrome (long styloid process)
C. Muscular
Mohammed Almuzian Page 7
8. 1. Torticollis
2. Decreased muscle tone after CVA or cerebral palsy
3. Massetric hypertrophy
D. Local dental factors
(Holmes 1989)
1. Number of teeth:
• Premature loss of primary teeth like C or D but not the E
• Traumatic loss of permenant teeth
• Hypodontia
• Supernumerary teeth
2. Size of teeth
• Macrodontia
• Microdontia
3. Position of teeth
• Ectopic eruption of teeth causing asymmetric crowding
• Localization of crowding
4. Habit like digit sucking habit
5. Pathology like caries and loss of tooth contact
6. Iatrogenic due to uncontrolled space closure in orthodontic treatment
Mohammed Almuzian Page 8
9. The local factors of asymmetry can also be divided into
(Lunstrom, 1961)
1. Qualitative – different size teeth/location in the arch/position of arch in head
2. Quantitative – differences in no. of teeth/presence of CLP
Diagnosis
i. History (trauma, family history, syndrome, previous radiation therapy)
ii. Clinical examination
A. Extraoral examination
• Profile
• Frontal
• Transverse
B. Intraoral features
• Vertical
• Transverse
• Anteroposterior
• Intraarch feature
• Functional assessment
iii. Supplemental records
1. Lateral Ceph
2. OPG
Mohammed Almuzian Page 9
10. 3. PA Ceph
• Anatomic approach,
• Bisection approach
• Triangulation approach
4. Technesium isotope scan
5. SPECT (single photo emission computer tomography)
6. Medical CT Scan
7. CBCT
8. MRI Scans
9. Study models
10. Facebow record
11. Photograph
12. Sterophotogrammetry
13. Laser scanning
14. Combinations
In details
I. History (trauma, family history, syndrome, previous radiation therapy)
II. Clinical examination
1. Extraoral examination
Profile assessment
• Class III skeletal pattern which is the first sign of Hemimandibualr hypertrophy problem
Mohammed Almuzian Page 10
11. • Class II skeletal pattern indicates Hemimandibualr atrophy
Frontal assessment
To assess the symmetry of the face a midline need to be constructed
I. Dropping a perpendicular line from glabella
• to supraorbital bridge
• to interpupilliary line
• to inter-auricular line
II. Dropping a line pass through nasion and philitrum and tip of the nose
III. By using the rule of fifths
Bird and worm view
Transverse assessment
• Chin cant
• Occlusal cant
2. Intraoral features
a) Vertical occlusal evaluation
• Canted occlusal plane (tongue blade/interpupillary line).
b) Transverse
A. X-bites (skeletal, dental or functional), may need to de-programme with occlusal splint for
definitive diagnosis.
B. Evaluation of dental midlines, when the mouth
• Open,
Mohammed Almuzian Page 11
12. • Initial contact
• CR,
• CO
c) Anteroposterior occlusal evaluations
• Molar and canine relationship in both sides
• Overjet
• Overbite
d) Intraarch feature
• Local dental factors (early loss etc.)
• Overall arch shape (max/mand). Lundstrom, 1961 used the maxillary raphe as a reference
line.
e) Functional assessment
• Displacements.
3. Supplemental records
1) Lateral Ceph
Sometime a rough idea can be extracted when the right and left sides are superimposed
2) OPG
• Useful to survey dental and bony structures of the maxilla and mandible.
• Shape of condyles and ramus
But geometric distortions exist due to focal tough, positional problem, magnification problem.
Mohammed Almuzian Page 12
13. 3) PA Ceph
• Valuable to compare right and left sides as located at relatively equal distances form the
film and X-ray source.
• It provides qualitative and quantitative evaluation.
• Taken in occlusion and mouth open.
• Bishara 1993 describe the methods of using PA radiograph
a) Anatomic approach, by Harvold 1964
• Horizontal line through ZF suture
• Vertical line perpendicular to this from crista galli.
• Nasion and ANS tend to fall on or very near ~ 90% of the time
b) Bisection approach
• Bilateral landmarks are located and bisected
• Reference line through as many of their midpoints as possible
c) Triangulation approach
• Vig and Hewitt,1979
• Identification of bilateral structures and midline
• Triangles are constructed that divide the face into various components
• Right and left triangles compared for symmetry
4) Technesium isotope scan, Proffit 2005
• Bone seeking Tc99m can be used to distinguish an active growing condyle
Mohammed Almuzian Page 13
14. • It is injected and then it can be detected in the body by medical equipment (gamma
cameras).
• False +ve is very common.
• Dose equivalent = 20 chest X-rays.
5) SPECT (single photo emission computer tomography) is a nuclear medicine
tomographic[1] imaging technique using gamma rays
6) Medical CT Scan
Accurate but high radiation
7) CBCT
8) MRI Scans
Useful for soft tissue asymmetries.
9) Study models
Demonstrate arch asymmetries
10) Facebow record
Using study casts, demonstrates the relationship of the jaws in all three planes
11) Photograph
12) Sterophotogrammetry Hajeer et al 2004
13) Laser scanning of the face by Toma 2011, Alqattan 2013
14) Combinations
Mohammed Almuzian Page 14
15. Class II and Class III Subdivisions
The subdivision always refers to the Class II side for Class II subdivisions and the Class III side
for Class III subdivisions. It is true dental asymmetry not related to localised crowding
Types of Class II Subdivisions
Janson et al 2003 described two basic types
1. A Type 1 Class II subdivision malocclusion demonstrates coincidence of the maxillary dental
midline with the facial midline and deviation of the mandibular midline.
• Any treatment in these Type 1 cases should therefore be aimed at the mandibular arch. This also
maintains symmetry in the maxillary arch, where it is most visible to the patient.
A. For cases with moderate to severe crowding, incisor protrusion, and/or the absence of a passive
lip seal, an extraction approach is ideal. But should three or four premolars be extracted? To
answer this question, Janson 2003 retrospectively evaluated 51 patients with Class II subdivision
malocclusions. Twenty-eight of the patients had four symmetric premolars removed, while the
remaining 23 patients had three premolars removed, two in the maxillary arch and one in the
mandibular arch on the Class I side. The results showed no real difference for most of the
variables assessed. However, the three premolar extraction group had a greater improvement of
the initial interdental midline deviation.
B. Cases with mild crowding are treated with single unit extraction in the lower arch or molar
distalisation
2. A Type 2 Class II subdivision malocclusion has the opposite characteristics, demonstrating
coincidence of the mandibular dental midline with the facial midline and deviation of the
maxillary midline.
• If extraction is indicated in these cases, then one maxillary premolar may be removed
• Care must be taken to avoid tilting the teeth, skewing the arch, or overcorrecting the midline of
the highly visible maxillary anterior dentition.
Mohammed Almuzian Page 15
16. • The amount of crowding and midline discrepancy also influence the decision to extract a first or
second premolar.
3. Combination Class II subdivision treatment: The remaining 20% of cases show traits of both
Type 1 and Type 2 Class II subdivision malocclusion, with some discrepancy present in both
arches. The goal is therefore to aim correction at both arches, so interarch mechanics such as
elastics or a spring Class II corrector seem most appropriate
Early intervention
• Some asymmetries may develop because of the early loss of teeth, and this could simply involve
space maintenance therapy to regain space or symmetry followed by space maintenance.
• Another possible cause is a single-or multiple-tooth crossbite, which results in a slide shift upon
occluding. Treatment entails correction of the cross-bite to remove the occlusal interference that
causes the slide shift upon closure
Types of Class III Subdivisions
• Although studies similar to those for Class II subdivisions have not been conducted in dental
Class III subdivision cases, Janson 2009 has suggested that an analogous rationale in diagnosis
and treatment planning can be applied in these patients.
• Another option that could be considered in Class III subdivision cases is the extraction of a
mandibular incisor
Treatment of asymmetry
Treatment depends on:
1. Age
Mohammed Almuzian Page 16
17. 2. Growth remains
3. Patient concern
4. Compliance
5. Severity
6. Aetiology (skeletal, dental, st, functionl),
7. Location
8. Progressivity.
9. Is there a cant to the maxillary plane
Treatment of asymmetry
A. Treatment of dental asymmetries
1. Stop habits and eliminate mandibular displacements (early in Tx)
2. Space management to correct asymmetry
3. Asymmetric differential mechanics
• Extraoral mechanics
• Inter-arch mechanics
• Intra-arch mechanics
B. Functional asymmetry
C. Skeletal asymmetry
1. Preventive treatment
2. Treatment of asymmetry
Mohammed Almuzian Page 17
18. i. Mild cases
ii. Moderate to severe
• Camouflage treatment
• Orthopaedic management
• Orthognathic surgery, Early intervention or Late intervention
D. Soft tissue asymmetry
In details
Treatment of dental asymmetries
Treatment is often orthodontically.
I. Stop habits and eliminate mandibular displacements (early in Tx)
II. Space management to correct asymmetry (space maintainer or balanced extraction)
1. Asymmetric and or Unilateral extraction (Rebellato, 1998)
2. Unilateral distalization by (URA with finger spring on one side supported by HG, asymmetric
HG, non-compliance molar distalizer like Jone Jigs or pendulum appliance, sliding jigs supported
by HG)
3. Space opening in one side and composite build ups of the microdontic teeth.
4. IPS of the macrodontic teeth.
III. Asymmetric differential mechanics
Holmes 1989 divided them into:
1. Extraoral mechanics
Mohammed Almuzian Page 18
19. • J hook (either on J hook or even two J hook cab be applied to the U and L simultaneously to
correct ML deviation in opposite direction).
• Asymmetric HG with Class III elastic to correct U & L ML that deviated to one side.
2. Inter-arch mechanics
• Differential II/III elastics,
• Oblique or diagonal elastic anteriorly (if too long can cant the occlusal plane).
3. Intra-arch mechanics
1) Bracket set up: Reverse the lower canine brackets on one side (the side at which the LML shifted)
or using tip edge bracket on one side allowing less tipping to correct the ML.
2) Alignment stage
• Unilateral LB,
• Unilateral cinch back
3) Anchorage
• Differential anchorage or increasing the number of anchor teeth
• TADs
4) Space closure stage:
• Push-pull mechanics
• Asymmetric torque that allow the space closure of the side with less torque of the posterior teeth
to happen thus aims in correcting the ML.
• Unilateral thinning of the AW
• Differential force during space closure
Mohammed Almuzian Page 19
20. • Unilateral closing loop,
• Elastomeric modules to increase the friction at one side to allow asymmetric space closure
Treatment mechanics
I. Upper incorrect to facial midline.
• asymmetric extraction
• lace-back canine or cinch back on non-shift side only
• open coil spring on shift side
II. Lower incorrect, without mandibular shift and without skeletal asymmetry.
• apply measures described above
• class III elastics to the non-shift side early in treatment, supported by upper headgear
III. Lower incorrect, without mandibular shift but with skeletal asymmetry.
• in mild cases, apply measures described above
• unilateral extraction in moderate cases where dento-alveolar compensation is to be maximised
• orthognathic surgery in severe cases, or acceptance of the condition
IV. Lower incorrect, with mandibular shift.
Where the centreline shift is due entirely to a mandibular displacement, the discrepancy will
correct once the displacement has been eliminated. Where other causes are also present, apply the
measures described above for types 1 and 2
V. Bimaxillary to the same side.
• The choice of extractions is most important. Removal of first premolars on the non-shift side and
second premolars on the shift side gives the most favourable anchorage balance for correction,
provided extractions are warranted.
• In uncrowded (skeletal asymmetry) cases, unilateral extractions may be considered if dentition is
generally protrusive, or accept the condition.
Mohammed Almuzian Page 20
21. VI. Bimaxillary to opposite sides
• Early in treatment, apply measures described as for type 1.
• Later in treatment, diagonal anterior elastic will provide the ideal vector without any demand on
anchorage.
• Class II & class III elastics also gives reciprocal anchorage.
• for resistant shifts in the later stages, "J" hook headgear applied to the canines in the non-shift
sides (eg upper left and lower right quadrants)
Functional asymmetry
1. Habit breaker if the functional displacement is due to cross bite caused by habit.
2. Mild deviations due to functional shifts can be done with minor occlusal adjustments (grinding
C’s, or extraction).
3. Occlusal splints may be needed for deprogramming
4. Expansion of the constricted arch (RME, Q helix, URA, AW or SARPE)
Skeletal asymmetry
Preventive treatment
Fortunately, most jaw fractures in preadolescent children can be treated with little or no surgical
manipulation of the segments and little immobilization of the jaws because the bony segments are
self-retentive and the healing process is rapid. Treatment should involve
• Open reduction of the fracture should be avoided.
• Short fixation times (usually maintained with intraoral intermaxillary elastics) and rapid
return to function.
• A functional appliance during the post-injury period can be used to minimize any growth
restriction. The appliance is a conventional activator or bionator-type appliance that
symmetrically advances the mandible to nearly an edge-to-edge incisor position. Using this
Mohammed Almuzian Page 21
22. appliance, the patient is forced to translate the mandible, and any remodelling can occur with the
mandible in the unloaded and forward position.
Treatment of skeletal asymmetry
A. Mild cases, accept or orthodontic camouflage after monitoring the progressivity of the
case.
B. Moderate to severe: after monitoring the progressivity of the case
1. Camouflage treatment by orthodontic alone
2. Orthopaedic management of occlusal canting in growing patients using hybrid functional by Vig
and Vig 1986. It consists of acrylic block at the side of overgrowth and no block at the
undergrowth site to allow eruption of the teeth at the underdeveloped site. There is a buccal
shield same like the one use in Frankle appliance to allow arch expansion.
Construction bite
• Bring Md forward towards vertical & transverse symmetry
• -Wax soft on unaffected side & hard on affected side to torque the ramus downward on
the shorter side.
Design
• Impede tooth eruption on the unaffected side.
• Bite block on the normal side impede further vertical development, eruption
• Lingual pad to posture md to normal side
• On the affected side buccal (expansion) and lingual shields to prevent the tongue getting
in between the teeth where vertical development is desired.
Mohammed Almuzian Page 22
23. 3. Orthognathic surgery
A. Early intervention
It is better to avoid early maxillary surgery to avoid scar interference with maxillary growth.
Sometime high condylar shaving or condylotomy is prescribed.
Indication
I. Ankylosis: treated by growth centre transplant using costrocondal rib in sever class II
II. HFM usually treated early 5 years by inverted L osteotomies or distraction (Davis and
Sandy1998)
III. Sever class III or class II with social impact
Advantages
I. To avoid consequence of disturbed or secondary unfavourable growth in the craniofacial
structure
II. Psychological benefit.
III. Breathing
B. Late intervention
The surgeries might be:
1. Lefort I osteotomy to reposition the maxilla
2. Sometime, mandibular asymmetry can cause some secondary maxillary asymmetry which might
be treated by:
• Maxillary segmental surgery,
• Surgically assisted RME.
Mohammed Almuzian Page 23
24. 3. Sagittal split osteotomies of the mandibular ramus to advance or shorten one side more than the
other
4. Other mandibular surgery are:
• Genioplasty
• VSS
• Inverted L
• Condylar excision,
• Condylar shave
• Lower mandibular border plasty (e.g Hemimandibualr hypertrophy)
• Distraction osteogenesis appears to offer the possibility of augmenting the amount of both bone
and soft tissue in the mandibular anterior area.
• Then consider – externalisation of the nerve and a lower border shave or build up of the
unaffected side with implants to improve the ST bulk or Coleman fat
•
Stability after orthognathic surgery
Proffit and Severt 1997 found that
1. Genioplasty to correct asymmetry was stable
2. Maxillary surgery to correct cant was stable
3. Ramus surgery 1/3 of the result is lost
4. Bimax is more stable than mandibular surgery alone
Mohammed Almuzian Page 24
25. Soft tissue asymmetry
It can be treated either by:
• Augmentations include the use of bone grafts, collagen filler, Botox and implants to
recontour the desired areas of the face
• Soft tissue reduction surgery.
Hemimandibualr elongation
1. Mechanism not understood,
2. Appears early teens (most frequent in girls)
3. Transverse displacement of the chin point
4. Lower dental ML deviation in relation to UML but correct to midpoint of the chin
5. ID canal NOT bowed on affected side,
6. Normal height of ramus of mandible
7. Obtuse angle of mandibular at side effected
8. Long mandibular body at side effected
9. No open bite or occlusal cant
10. Cross bite at the non-affected side and scissor bite on the contralateral.
11. There is no cant to the rima oris, but the lower lip
Mohammed Almuzian Page 25
27. Hemimandibualr hypertrophy
1. Mechanism not understood
2. Appears late teens (may be earlier, most frequent in girls)
3. Three dimensional enlargement of one side of the mandible including condyle, condylar neck,
ramus and body of the mandible
4. Big condyle
5. ID canal bowed on affected side,
6. Body of mandible bows downwards on affected side,
7. Angle of mandible rounded
8. Increase mandibular ramus height
9. Cant of occlusion at effected side
10. Lower dental ML deviation in relation to midpoint of the chin in order to compensate by increase
in the incisor angulation.
11. Treatment involves ramus osteotomy, condylectomy or condylar shave.
12. There may be a lateral open bite on the affected side depending on whether the extent of
maxillary dentoalveolar compensation on the affected side has kept up with the increased vertical
ramal growth, and whether or not the tongue has found a resting position between the posterior
dental occlusion.
13. The unilateral increase in lower face height gives rise to a sloping rima oris, the oral commissure
on the affected side is displaced inferiorly but not laterally
Mohammed Almuzian Page 27
29. Hemifacial Hypertrophy
• Rare
• Overgrowth of ST and HT on one side of the face
• Cause – asymmetric distribution of the NCC
• Problem: You cannot simply debulk the whole mandible due to ID nerve, can place implant on
unaffected side to even things out
Condylar hypoplasia
Similar to hemimandibualr hyperatrophy but with significant antigonial notch
Condylar ankylosis
True condylar ankylosis
• I caused by pathology or trauma or infection
• X ray reveals pure bony union
• Very sever restricted mouth opening
• The best treatment of condylar fracture is early mobilization to avoid ankylosis
False condylar ankylosis
• Transient Limited mouth opening (Trismus)
• Due to extra-articular abnormality, the result is limited mouth opening
Limited mouth opening (Trismus)
There are many causes of limited mouth opening which may be classified as follows.
1. Intra-articular (intracapsular)
Mohammed Almuzian Page 29
30. • Functional: Anterior displacement of the meniscus without reduction.
• Trauma: Osseous or fibro-osseous ankylosis, secondary to trauma
• Inflammatory: Ankylosing spondylitis, juvenile rheumatoid arthritis.
• Infection in the joint.
• Tumour of the joint structures.
2. Extra-articular (extracapsular)
• Muscle trismus.
• Disuse muscle atrophy, contractures secondary to intra-articular ankylosis or psychogenic
trismus.
• Post-radiotherapy and thermal scarring.
• Post-traumatic scarring.
• Oral submucous fibrosis.
• Infection or inflammation of the masticatory muscle
• Anatomical like Eagle syndrome.
Presentation of Ankylosis
If developed at early age:
• Ankylosis in children produces impaired mandibular growth with bilateral deformity in all
dimensions.
• This deformity is asymmetrical in unilateral cases with a straight small hemi-mandible on the
ankylosed side, and a marked contralateral bowing deformity.
Mohammed Almuzian Page 30
31. • Retrognathia and retrogenia become more apparent with age.
• This produces an occlusal cant down to the normal side.
• In rare bilateral cases the mandible is short but symmetrical.
• In all cases the inter-incisal opening can be up to 10 mm even with total bony fusion reflecting
the bone elasticity within the masticatory system.
Diagnosis of for ankylosed TMJ
• History and clinical examination
• Imaging techniques including:
1. OPG.
2. True lateral skull.
3. PA
4. CT scan with 3D reconstruction.
5. Standard orthognathic photographic series.
Treatment Choices
Resection of the ankylosis should be carried out as early as possible to enable normal growth and
avoid secondary deformity.
There are many treatment strategies depending on the age of the patient the duration of the
deformity and degree of secondary deformity.
A. Ankylosis presenting in childhood or Ankylosis presenting during or post adolescence
1. Excision of the condyle
Mohammed Almuzian Page 31
32. 2. Insertion of an interpositional temporalis myofascial peninsular flap
3. Bilateral coronoidectomies (coronoidotomies) to free temporalis contractures
4. Costochondral growth centre to restore function and ramus growth with or without Distraction
osteogenesis.
NB: The anteroposterior deficiency and asymmetry in childhood is usually self-corrected with
catch-up growth.
B. Ankylosis presenting after the completion of facial growth.
1. Excision of the condyle
2. Insertion of an interpositional temporalis myofascial peninsular flap
3. Bilateral coronoidectomies (coronoidotomies) to free temporalis contractures
4. Reconstruction of the condyle with or without distraction osteogenesis.
5. In addition to one of these:
• Genioplasty
• BSS or inverted L osteotomy.
• The maxillary procedure can be done to correct secondary problems
C. Very late ankylosis in adults with no interference with facial growth.
Exactly as B but in addition to 7-day pre- and 2-month postoperative course of bisphosphonate,
which is currently alendronic acid 10 mg a day in the morning to avoid the localised
fibrodysplasia ossificans .
Surgical Approach and preparation
The preoperative preparation differs from the standard orthognathic workup in several respects.
Mohammed Almuzian Page 32
33. 1. The anaesthetist must be skilled in fibre optic intubation and tracheostomy or submental
approach.
2. The temporal area must be shaved and cleaned before the patient is taken into theatre.
Complications
1. Scar
2. Damage to the orbital and frontal branches of the facial nerve.
3. Frey’s syndrome
4. Damage to parotid salivary gland
5. Limited opening due to
• Inadequate bone removal
• Failure to do a bilateral coronoidectomies.
• Postoperative fibrodysplasia ossificans
• Fusion of the graft with re-ankylosis
6. Failure of the costochondral graft to grow.
7. Excess growth of the graft
8. Pneumothorax.
Summary of the evidences
• Vig & Hewitt (1975) showed an overall asymmetry present in most of the 36% of
children in their study, with the left side being larger.
Mohammed Almuzian Page 33
34. • 26% of orthognathic cases have facial asymmetry (Proffit, 1996) and 60% of them with
asymmetry in the lower face and 80% of them have chin deviation. The midface (primarily the
nose) also was affected in about 30% of the asymmetric patients
• Another classification from Bishara 1994 et al and Chai et al 2008
• Condylar hyperplasia which is subdivided by Obowegeser and Mekek 1986 into:
• Local dental factors , (Holmes 1989)
• Bishara 1993 describe the methods of using PA radiograph
• Technesium isotope scan, Proffit 2005
• Sterophotogrammetry Hajeer et al 2004
• Laser scanning of the face by Toma 2011
• Treatment of dental asymmetries, Space management to correct asymmetry, Asymmetric
XLA’s (Rebellato, 1998)
• Asymmetric differential mechanics , Holmes 1989
• Stability after orthognathic surgery, Proffit and Severt 1997
• Hemifacial microsomia
1. Prevalence
2. 1/5000 births but varies
3. Autosomal dominant
4. Affect male than female m:f = 3:2
5. A condition that affects aural, oral and mandibular development. It caused by disturbance
in the number, activity and migration of NCC (especially in the lower face area, the NCC migrate
for long distance)
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35. • Second way of treatment distraction osteogenesis (DO).It is a method of increasing bone
length & originally described by Ilizarov (1988).
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