Description :
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
The document discusses growth and development of the maxilla from prenatal to postnatal periods. It describes how the maxilla develops from maxillary processes in the embryo. During prenatal growth, the maxilla is displaced downward and forward as the cranial base grows. Postnatally, the maxilla grows through bone deposition, remodeling at sutures, and expansion of the maxillary sinus. The primary palate develops early from the median palatine process, while the secondary palate forms from the palatine shelves fusing in the midline.
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 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
00919248678078
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
The document discusses several theories of craniofacial growth including remodeling theory, genetic theory, sutural theory, nasal septum theory, and the functional matrix hypothesis. It provides details on the key concepts and inconsistencies of each theory. The remodeling theory proposed that growth occurs through bone deposition and resorption at surfaces. The sutural theory emphasized the role of sutures and cartilage in driving growth. The nasal septum theory proposed the nasal septum cartilage pushes the midface forward during growth. The functional matrix hypothesis views the skull as comprising functional units that drive skeletal growth.
The document discusses extraoral headgear appliances used in orthodontic treatment. Headgears apply forces from the neck or head to influence maxillary and mandibular growth. They consist of a force delivery unit (facebow or J-hook), force generating unit (elastic bands), and anchor unit (neck or head). Facebows can control vertical, sagittal, and transverse dental and skeletal movements. Unilateral facebows provide asymmetrical distal force. Proper selection of headgear type and anchorage location is important to achieve desired orthodontic effects.
The document discusses growth and development of the cranium. It covers bone growth mechanisms including endochondral and intramembranous ossification. It describes synchondroses and sutures, which allow growth of the cranial bones. Prenatal growth results in a cartilaginous cranium at birth that has several fontanels. Postnatal growth involves expansion of the cranial base and brain case. Several theories of cranial growth are reviewed, including the functional matrix theory proposing that soft tissue growth guides bone formation.
This document provides an overview of postnatal growth of the facial structures, including the nasomaxillary complex and mandible. It describes how growth occurs at sutures and through bone deposition and resorption at various surfaces. For the nasomaxillary complex, this leads to increases in height, width, and anteroposterior length. Mandibular growth is driven by cartilage at the condyle and remodeling of bone, resulting in downward and forward displacement over time as the gonial angle decreases. Both areas demonstrate the principle of bone modeling according to directions of force.
The document discusses growth and development of the maxilla from prenatal to postnatal periods. It describes how the maxilla develops from maxillary processes in the embryo. During prenatal growth, the maxilla is displaced downward and forward as the cranial base grows. Postnatally, the maxilla grows through bone deposition, remodeling at sutures, and expansion of the maxillary sinus. The primary palate develops early from the median palatine process, while the secondary palate forms from the palatine shelves fusing in the midline.
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 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
00919248678078
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
The document discusses several theories of craniofacial growth including remodeling theory, genetic theory, sutural theory, nasal septum theory, and the functional matrix hypothesis. It provides details on the key concepts and inconsistencies of each theory. The remodeling theory proposed that growth occurs through bone deposition and resorption at surfaces. The sutural theory emphasized the role of sutures and cartilage in driving growth. The nasal septum theory proposed the nasal septum cartilage pushes the midface forward during growth. The functional matrix hypothesis views the skull as comprising functional units that drive skeletal growth.
The document discusses extraoral headgear appliances used in orthodontic treatment. Headgears apply forces from the neck or head to influence maxillary and mandibular growth. They consist of a force delivery unit (facebow or J-hook), force generating unit (elastic bands), and anchor unit (neck or head). Facebows can control vertical, sagittal, and transverse dental and skeletal movements. Unilateral facebows provide asymmetrical distal force. Proper selection of headgear type and anchorage location is important to achieve desired orthodontic effects.
The document discusses growth and development of the cranium. It covers bone growth mechanisms including endochondral and intramembranous ossification. It describes synchondroses and sutures, which allow growth of the cranial bones. Prenatal growth results in a cartilaginous cranium at birth that has several fontanels. Postnatal growth involves expansion of the cranial base and brain case. Several theories of cranial growth are reviewed, including the functional matrix theory proposing that soft tissue growth guides bone formation.
This document provides an overview of postnatal growth of the facial structures, including the nasomaxillary complex and mandible. It describes how growth occurs at sutures and through bone deposition and resorption at various surfaces. For the nasomaxillary complex, this leads to increases in height, width, and anteroposterior length. Mandibular growth is driven by cartilage at the condyle and remodeling of bone, resulting in downward and forward displacement over time as the gonial angle decreases. Both areas demonstrate the principle of bone modeling according to directions of force.
The document discusses various concepts related to mandibular growth rotations proposed by different orthodontic researchers over time. It begins by introducing Arne Bjork who first described growth rotations in 1955. It then covers Enlow's concept of remodeling and displacement rotations. Bjork's 1969 classification of forward and backward mandibular rotations is described, including his identification of three types of forward and two types of backward rotations based on their center of rotation. The document also discusses concepts by Bjork and Skieller on total, matrix, and intramatrix rotations. Fred Schudy's concept relating rotation to the disharmony between vertical, anteroposterior and horizontal growth is summarized. Finally, Dibbets' re
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
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
Growth & development of maxilla and mandiblePiyush Verma
The document summarizes the growth and development of the maxilla and mandible. It discusses the prenatal growth of the maxilla, including how the maxillary process develops from the first branchial arch and fuses with other structures to form the primitive palate. It also describes the development of the primary and secondary palate, with the palatal shelves growing horizontally to fuse and form the completed palate. The prenatal growth of the mandible is also discussed briefly.
The document discusses theories of mandibular growth and the construction bite technique used in orthodontic appliances. It describes several theories of condylar growth including the genetic control theory, functional matrix hypothesis, and lateral pterygoid hyperactivity hypothesis. It also discusses the growth relativity hypothesis. The construction bite is critical for functional appliances to work properly and involves analyzing study models, function, and cephalometrics to determine the proper vertical and horizontal positioning of the mandible. The magnitude of correction depends on factors like the type of malocclusion and developmental state.
The document discusses the development of the maxilla from prenatal to postnatal stages. Prenatally, the maxilla develops through intramembranous ossification beginning around the 8th week. The palate forms from the fusion of two palatal shelves. Postnatally, the maxilla grows through translation (displacement) and transposition (remodeling of surfaces), with various theories proposed to explain its downward and forward growth. The midpalatal suture mediates widening of the palate between 1-2 years of age through growth.
Growth and development of maxilla and mandible/endodontic coursesIndian 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.for more details please visit
www.indiandentalacademy.com
Nasoalveolar moulding /certified fixed orthodontic courses by Indian dental a...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 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
The document discusses Bjork's concept of jaw rotation during growth. It summarizes Bjork's landmark longitudinal study from 1951-1969 that used metal implants to track sites of growth and resorption in the mandible. Bjork observed that the mandible undergoes a downward and backward rotation during growth, with greater growth occurring posteriorly than anteriorly. He classified mandibular rotation patterns into forward and backward types based on the center of rotation. The study provided insights into mandibular growth mechanisms and implications for orthodontic treatment planning.
1. The document discusses prenatal facial growth, which can be divided into three periods: the period of the ovum, embryo, and fetus.
2. During the period of the embryo (1-7 weeks), the major development of the facial and cranial regions occurs, including the formation of the branchial arches which give rise to structures of the face, neck, and throat.
3. In the period of the fetus, accelerated growth of craniofacial structures occurs resulting in increased size and changes in proportions, and the prenatal growth of structures such as the cranial base, maxilla, mandible, palate, and mandible are described.
Growth of maxilla /certified fixed orthodontic courses by Indian dental acad...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
00919248678078
Basic mechanism of craniofacial growth /certified fixed orthodontic courses b...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
Classification of malocclusion in orthodontics /certified fixed orthodontic ...Indian dental academy
Welcome to 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 has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
This document discusses growth rotations of the maxilla and mandible. It defines various types of rotations that can occur, including forward and backward rotations. Forward rotation of the mandible is classified into three types (A, B, C) based on the center of rotation. Implant radiography techniques are used to measure and classify rotations by observing changes in implant positioning over time. Rotations influence tooth eruption and the ultimate positioning of teeth, which impacts orthodontic treatment planning.
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
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
Concepts of dental occlusion and importance of six keys of occlusion in orth...Dr.Maulik patel
This document provides an overview of concepts of occlusion. It begins with introducing the importance of understanding occlusion in dentistry and orthodontics. It then discusses the development of occlusion concepts from fictional, hypothetical to factual periods. Key figures like Angle, Case and their contributions are explained.
Normal, ideal and traumatic occlusions are defined. Factors determining tooth position like forces from muscles and contacts are covered. Concepts like curves of Spee, Wilson and Monson are explained. Classifications of occlusion based on mandibular position and relationships to first molars are summarized. Finally, occlusion patterns like canine guidance and cusp-fossa are briefly described.
Growth and Development of Craniofacial Complex IIAU Dent
This document summarizes a lecture on craniofacial growth and development. It discusses how the cranium and face grow, defining growth and development. Growth occurs through intramembranous bone formation or endochondral bone formation at sutures and synchondroses. Factors like bone growth, soft tissues, occlusion forces, and skeletal patterns influence occlusion development. The cranial vault completes growth by age 8 while the cranial base continues growing into the 20s. The face grows rapidly in depth initially and its growth is mostly complete by ages 16-18 for the upper face and 20-25 for the mandible.
The document provides information about the Twin Block appliance, including its history, design, and use. It was first used in 1977 by Dr. William Clark to treat a young patient with a Class II malocclusion and 9mm overjet. The appliance uses inclined planes and bite blocks to posture the mandible forward, applying forces to correct the malocclusion. It can be worn full-time and provides rapid correction through functional forces on the dentition and underlying bone. The document discusses the philosophy, advantages, disadvantages, variations, and selection criteria for the Twin Block appliance.
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
Description :
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
The document discusses various concepts related to mandibular growth rotations proposed by different orthodontic researchers over time. It begins by introducing Arne Bjork who first described growth rotations in 1955. It then covers Enlow's concept of remodeling and displacement rotations. Bjork's 1969 classification of forward and backward mandibular rotations is described, including his identification of three types of forward and two types of backward rotations based on their center of rotation. The document also discusses concepts by Bjork and Skieller on total, matrix, and intramatrix rotations. Fred Schudy's concept relating rotation to the disharmony between vertical, anteroposterior and horizontal growth is summarized. Finally, Dibbets' re
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
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
Growth & development of maxilla and mandiblePiyush Verma
The document summarizes the growth and development of the maxilla and mandible. It discusses the prenatal growth of the maxilla, including how the maxillary process develops from the first branchial arch and fuses with other structures to form the primitive palate. It also describes the development of the primary and secondary palate, with the palatal shelves growing horizontally to fuse and form the completed palate. The prenatal growth of the mandible is also discussed briefly.
The document discusses theories of mandibular growth and the construction bite technique used in orthodontic appliances. It describes several theories of condylar growth including the genetic control theory, functional matrix hypothesis, and lateral pterygoid hyperactivity hypothesis. It also discusses the growth relativity hypothesis. The construction bite is critical for functional appliances to work properly and involves analyzing study models, function, and cephalometrics to determine the proper vertical and horizontal positioning of the mandible. The magnitude of correction depends on factors like the type of malocclusion and developmental state.
The document discusses the development of the maxilla from prenatal to postnatal stages. Prenatally, the maxilla develops through intramembranous ossification beginning around the 8th week. The palate forms from the fusion of two palatal shelves. Postnatally, the maxilla grows through translation (displacement) and transposition (remodeling of surfaces), with various theories proposed to explain its downward and forward growth. The midpalatal suture mediates widening of the palate between 1-2 years of age through growth.
Growth and development of maxilla and mandible/endodontic coursesIndian 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.for more details please visit
www.indiandentalacademy.com
Nasoalveolar moulding /certified fixed orthodontic courses by Indian dental a...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 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
The document discusses Bjork's concept of jaw rotation during growth. It summarizes Bjork's landmark longitudinal study from 1951-1969 that used metal implants to track sites of growth and resorption in the mandible. Bjork observed that the mandible undergoes a downward and backward rotation during growth, with greater growth occurring posteriorly than anteriorly. He classified mandibular rotation patterns into forward and backward types based on the center of rotation. The study provided insights into mandibular growth mechanisms and implications for orthodontic treatment planning.
1. The document discusses prenatal facial growth, which can be divided into three periods: the period of the ovum, embryo, and fetus.
2. During the period of the embryo (1-7 weeks), the major development of the facial and cranial regions occurs, including the formation of the branchial arches which give rise to structures of the face, neck, and throat.
3. In the period of the fetus, accelerated growth of craniofacial structures occurs resulting in increased size and changes in proportions, and the prenatal growth of structures such as the cranial base, maxilla, mandible, palate, and mandible are described.
Growth of maxilla /certified fixed orthodontic courses by Indian dental acad...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
00919248678078
Basic mechanism of craniofacial growth /certified fixed orthodontic courses b...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
Classification of malocclusion in orthodontics /certified fixed orthodontic ...Indian dental academy
Welcome to 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 has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
This document discusses growth rotations of the maxilla and mandible. It defines various types of rotations that can occur, including forward and backward rotations. Forward rotation of the mandible is classified into three types (A, B, C) based on the center of rotation. Implant radiography techniques are used to measure and classify rotations by observing changes in implant positioning over time. Rotations influence tooth eruption and the ultimate positioning of teeth, which impacts orthodontic treatment planning.
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
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
Concepts of dental occlusion and importance of six keys of occlusion in orth...Dr.Maulik patel
This document provides an overview of concepts of occlusion. It begins with introducing the importance of understanding occlusion in dentistry and orthodontics. It then discusses the development of occlusion concepts from fictional, hypothetical to factual periods. Key figures like Angle, Case and their contributions are explained.
Normal, ideal and traumatic occlusions are defined. Factors determining tooth position like forces from muscles and contacts are covered. Concepts like curves of Spee, Wilson and Monson are explained. Classifications of occlusion based on mandibular position and relationships to first molars are summarized. Finally, occlusion patterns like canine guidance and cusp-fossa are briefly described.
Growth and Development of Craniofacial Complex IIAU Dent
This document summarizes a lecture on craniofacial growth and development. It discusses how the cranium and face grow, defining growth and development. Growth occurs through intramembranous bone formation or endochondral bone formation at sutures and synchondroses. Factors like bone growth, soft tissues, occlusion forces, and skeletal patterns influence occlusion development. The cranial vault completes growth by age 8 while the cranial base continues growing into the 20s. The face grows rapidly in depth initially and its growth is mostly complete by ages 16-18 for the upper face and 20-25 for the mandible.
The document provides information about the Twin Block appliance, including its history, design, and use. It was first used in 1977 by Dr. William Clark to treat a young patient with a Class II malocclusion and 9mm overjet. The appliance uses inclined planes and bite blocks to posture the mandible forward, applying forces to correct the malocclusion. It can be worn full-time and provides rapid correction through functional forces on the dentition and underlying bone. The document discusses the philosophy, advantages, disadvantages, variations, and selection criteria for the Twin Block appliance.
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
Description :
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
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
Growth and development /certified fixed orthodontic courses by Indian dental ...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
Growth and development /certified fixed orthodontic courses by Indian dental ...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 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
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
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
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
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
00919248678078
C r growth ash /certified fixed orthodontic courses by Indian dental academy 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 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
Post natal growth and development of cranio facial complexKarishma Sirimulla
This seminar includes various types of growth patterns includies the theories of growth and development including counter principles from basics to various affecting factors of growth and development
The document discusses several theories of craniofacial growth including:
1. Sutural dominance theory which posits that sutures are the primary drivers of growth. However, evidence shows sutures are growth sites not centers and respond to external stimuli.
2. Cartilaginous theory which argues growth centers are cartilages like the nasal septum and condylar cartilage. Removal of cranial base synchondroses arrests cranial base growth.
3. Functional matrix theory suggests soft tissues play a role through their response to functional forces during development. No single theory alone can fully explain craniofacial growth.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Growth modulation /certified fixed orthodontic courses by Indian dental academyIndian 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
Theroies of growth /certified fixed orthodontic courses by Indian dental acad...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
Growth & development /certified fixed orthodontic courses by Indian dental a...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
00919248678078
Growth theories /certified fixed orthodontic courses by Indian dental academy 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
00919248678078
Similar to Copy of growth and development of the mandible1/certified fixed orthodontic courses by Indian dental academy (20)
Opportunity for Dentists (BDS/MDS )to relocate to United kingdom -Register as a DENTAL HYGIENIST/ DENTAL THERAPIST without Board exams and after approval you can register in GDC as a DH/DT and start working as a DH/DT Immediately and get paid.
You can complete the whole process in 3-4 months.Salary range for DH/DT is around 2500-3500 Pounds per month.
Eligibility / requirements-
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at the appropriate level.(Within 2 yrs of application date )
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1ST, 2ND AND 3RD ORDER BENDS IN STANDARD EDGEWISE APPLIANCE SYSTEM /Fixed ort...Indian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals
who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry,
Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
I –Aligners are made with FDA approved transparent thermoplastic materials using 3D scanning, 3D Printing and finally Trays with Pressure vacuum formers.
Dear Doctor,
Indian Dental Academy Now offers comprehensive online Orthodontics course.
Course includes:
1.whiteboard lecture presentations
2.Case Discussions
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For Demo please visit :www.idalectures.com/preview/
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Thanks & Regards
Indian Dental Academy
--
Indian Dental Academy
Leader in continuing dental education
www.indiandentalacademy.com
skype:indiandentalacademy
+919248678078
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
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
Cytotoxicity of silicone materials used in maxillofacial prosthesis / dental ...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.for more details please visit
www.indiandentalacademy.com
Diagnosis and treatment planning in completely endntulous arches/dental coursesIndian 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.for more details please visit
www.indiandentalacademy.com
Properties of Denture base materials /rotary endodontic coursesIndian dental academy
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offering a wide range of dental certified courses in different formats.for more details please visit
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This document discusses dental occlusion concepts and philosophies for complete dentures. It introduces key terms like physiologic occlusion and defines different occlusion schemes like balanced articulation and monoplane articulation. The document discusses advantages and disadvantages of using anatomic versus non-anatomic teeth for complete dentures. It also outlines requirements for maintaining denture stability, such as balanced occlusal contacts and control of horizontal forces. The goal of occlusion for complete dentures is to re-establish the homeostasis of the masticatory system disrupted by edentulism.
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
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 dental casting investment materials. It describes the three main types of investments - gypsum bonded, phosphate bonded, and ethyl silicate bonded investments. For gypsum bonded investments specifically, it details their classification, composition including the roles of gypsum, silica, and modifiers, setting time, normal and hygroscopic setting expansion, and thermal expansion. It provides information on how the properties of gypsum bonded investments are affected by their composition. The document serves as a comprehensive overview of dental casting investment materials.
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
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
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
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
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
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxEduSkills OECD
Iván Bornacelly, Policy Analyst at the OECD Centre for Skills, OECD, presents at the webinar 'Tackling job market gaps with a skills-first approach' on 12 June 2024
This document provides an overview of wound healing, its functions, stages, mechanisms, factors affecting it, and complications.
A wound is a break in the integrity of the skin or tissues, which may be associated with disruption of the structure and function.
Healing is the body’s response to injury in an attempt to restore normal structure and functions.
Healing can occur in two ways: Regeneration and Repair
There are 4 phases of wound healing: hemostasis, inflammation, proliferation, and remodeling. This document also describes the mechanism of wound healing. Factors that affect healing include infection, uncontrolled diabetes, poor nutrition, age, anemia, the presence of foreign bodies, etc.
Complications of wound healing like infection, hyperpigmentation of scar, contractures, and keloid formation.
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The recent surge in pro-Palestine student activism has prompted significant responses from universities, ranging from negotiations and divestment commitments to increased transparency about investments in companies supporting the war on Gaza. This activism has led to the cessation of student encampments but also highlighted the substantial sacrifices made by students, including academic disruptions and personal risks. The primary drivers of these protests are poor university administration, lack of transparency, and inadequate communication between officials and students. This study examines the profound emotional, psychological, and professional impacts on students engaged in pro-Palestine protests, focusing on Generation Z's (Gen-Z) activism dynamics. This paper explores the significant sacrifices made by these students and even the professors supporting the pro-Palestine movement, with a focus on recent global movements. Through an in-depth analysis of printed and electronic media, the study examines the impacts of these sacrifices on the academic and personal lives of those involved. The paper highlights examples from various universities, demonstrating student activism's long-term and short-term effects, including disciplinary actions, social backlash, and career implications. The researchers also explore the broader implications of student sacrifices. The findings reveal that these sacrifices are driven by a profound commitment to justice and human rights, and are influenced by the increasing availability of information, peer interactions, and personal convictions. The study also discusses the broader implications of this activism, comparing it to historical precedents and assessing its potential to influence policy and public opinion. The emotional and psychological toll on student activists is significant, but their sense of purpose and community support mitigates some of these challenges. However, the researchers call for acknowledging the broader Impact of these sacrifices on the future global movement of FreePalestine.
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Copy of growth and development of the mandible1/certified fixed orthodontic courses by Indian dental academy
1. GROWTH AND DEVELOPMENT
OF MAXILLA & MANDIBLE
INDIAN DENTAL ACADEMY
Leader in continuing Dental Education
www.indiandentalacademy.com
2. CONTENTS
Introduction
Definitions
Importance of growth and development
Mechanism of bone formation
Theories of growth
Prenatal and postnatal growth of maxilla
Age changes in maxilla
Prenatal and postnatal growth of mandible
Age changes in mandible
Developmental disturbances of jaws
Prosthodontic considerations
Conclusion
biblography www.indiandentalacademy.com
3. INTRODUCTION
A thorough background in craniofacial growth and
development is necessary for every dentist. It is
difficult to comprehend conditions observed in adults
without understanding the developmental processes
that produced these problems.
It is also important to distinguish normal variation
from the effects of abnormal or pathologic process.
Since dentists are involved in the treatment of not
just the dentition but also the entire dentofacial
complex, a through understanding of not only the
pattern of normal growth but also of the mechanisms
that underlie it is very essential.
www.indiandentalacademy.com
4. DEFINITIONS OF GROWTH
“Growth refers to increase in size” - Todd.
“Growth usually refers to an increase in size
and number” – Proffit.
“Change in any morphological parameter which is
measurable”- Moss
“Self multiplication of living substance”-
J.S.Huxley.
www.indiandentalacademy.com
5. DEFINITIONS OF DEVELOPMENT
Development is a progress towards maturity”
– Todd
“Development refers to all naturally occurring
progressive, unidirectional, sequential changes in
the life of an individual from it’s existence as a
single cell to it’s elaboration as a multifunctional
unit terminating in death” – Moyers
www.indiandentalacademy.com
6. Importance of growth and
development :
To determine the growth deviation of particular individual, we
study normal health variations.
In order to make accurate description of growth observations,
corresponding precise information about the normal state
must be available.
www.indiandentalacademy.com
7. Changes in the pattern of growth that occur over a
period of time within representative samples of
population are valuable indicators of changes in
general health and nutritional status of the
populations.
It would not be possible to design and conduct
investigation regarding control mechanism of growth,
if no precise data were available describing the
resultant somatic effect.
www.indiandentalacademy.com
8. MECHANISMS OF BONE
GROWTH
Cortical drift : It is the
growth movement (relocation
or shifting) of an enlarging
portion of a bone by the
remodeling action of its
osteogenic tissues towards
the depository surface.
www.indiandentalacademy.com
9. Displacement : It is the movement of the whole
bone as a unit. Displacement can be of two types.
Primary displacement : If a bone gets displaced
as a result of its own growth, it is called primary
displacement.
Secondary displacement : If the bone gets
displaced as a result and growth and enlargement of
an adjacent bone, it is called secondary displacement
www.indiandentalacademy.com
12. INTRAMEMBRANEOUS
OSSIFICATION
At site of bone formation mesenchymal cells become
aggregated
Mesenchymal cells lay down bundles of collagen
fibres
At initial site of ossification mesenchymal cells
differentiate into osteoblasts
Osteoblasts deposit osteoid
By deposition of calcium salts osteoid converts into
bony lamella(primary trabecular bone)
www.indiandentalacademy.com
14. ENDOCHONDRAL OSSIFICATION
Formed by transformation of cartilage “bone models.”
Mesenchymal condensation –some differentiated
cells become chondroblasts and lays down
cartilage,cells on surface of cartilage form
perichondrium.
Intercellular substance surrounding cartilage calcify ,
nutrition cut off , cells die ,PRIMARY AREOLAE.
www.indiandentalacademy.com
15. Periosteal bud eats away the
calcified matrix- large cavities –
SECONDARY AREOLAE.
Osteogenic cells become
osteoblasts , lay down osteoid.
Bone deposited– lamellar bone
– primary ossification centre.
www.indiandentalacademy.com
17. THEORIES OF GROWTH
Genetic theory :Brodie in 1941 This theory states
that all growth is controlled by genetic influence and is
pre-planned. This is one of the earliest theories put
forward.
www.indiandentalacademy.com
18. Scott’s Hypothesis of nasal septum :
(Cartilaginous theory) (Scott in 1948)
According to scott, intrinsic growth controlling
factors are present in cartilage and periosteum with
sutures being only secondary. He viewed the
cartilaginous sites throughout the skull as primary
centres of growth.
Ex : Growth of the maxilla is attributed to the nasal
septal cartilage. According to scott, the nasal septal
cartilage is the pacemaker for growth of the entire
naso – maxillary complex.
www.indiandentalacademy.com
19. Moss Hypothesis of functional matrix :
(Melvin Moss in 1960)
Moss felt that bone and cartilage lack growth
determination and growth in response to intrinsic
growth of the associated tissues, noting that the
genetic coding for craniofacial skeletal growth is
outside the bony skeleton. He terms the associated
tissues “functional matrices”
Moss argues the skeletal tissues grow only in
response to soft tissue growth. The effect is a
passive translation of skeletal components in
space.
www.indiandentalacademy.com
20. Sicher’s hyposthesis of sutural dominance :
(Sicher in 1947) Sicher deduced from the many
studies using vital dyes that the sutures were causing
most of the growth. The primary event in sutural
growth is the proliferation of the connective tissue
between the two bones.
If the sutural connective tissue proliferates, it creates
the space for oppositional growth at the borders of
the two bones. Replacement of the proliferating
connective tissue was necessary for functional
maintenance of the bones.
www.indiandentalacademy.com
21. Van Limborgh’s Theory (1970) : A multi-
factorial theory was put forward by van limborgh he
explains the process of growth and development in
a review that combines all the 3 existing theories,
the functional matrix theory of moss, sichers theory
and Genetic theory.
www.indiandentalacademy.com
22. Wolff’s law of transformation of bone.
“ the architecture of bone is such that
it can best resist the forces which are
brought to bear upon it with the use of
as little tissue as possible.”
www.indiandentalacademy.com
23. GROWTH SPURTS
GROWTH DOES NOT TAKE PLACE UNIFORMLY
AT ALL TIMES.THERE SEEMS TO BE PERIODS
WHEN A SUDDEN ACCLERATION OF GROWTH
OCCUARS.THIS SUDDEN INCREASE IN GROWTH
IS TERMED AS GROWTH SPURTS
THE PHYSIOLOGICAL ALTERATION IN
HARMONAL SECRETIONIS THE CAUSE FOR
ACCENTUATED GROWTH
www.indiandentalacademy.com
24. TIMINGS OF GROWTH SPURTS
JUST BEFORE BIRTH
ONE YEAR AFTER BIRTH
MIXED DENTITION GROWTH SPURT
BOYS: 8-11 YEARS
GIRLS: 7-9 YEARS
PRE PUBERTAL GROWTH SPURT
BOYS: 14-16 YEARS
GIRLS: 11-13 YEARS
www.indiandentalacademy.com
25. SCAMMONS CURVE OF GROWTH
DIFFERENT ORGANS GROW AT DIFFERENT
RATES TO A DIFFERENT AMOUNT AND AT
DIFFERENT RATES
LYMPHOID TISSUE:PROLIFERATES RAPIDLY IN
LATE CHILDHOOD AND REACHES ALMOST 200 %
OF ADULT SIZE
NEURAL TISSUE:GROWS VERY RAPIDLY AND
ALMOST REACHES ADULT SIZE BY 6-7 YEARS
www.indiandentalacademy.com
27. GENITAL TISSUE:THEY SHOW NEGLIGIBLE
GROWTH UNTILL PUBERTY. THEY GROW
RAPIDLY AT PUBERTY REACHING ADULT SIZE
AFTER WHICH GROWTH CEASES
VISCERAL TISSUE:EXHIBIT AN “S” SHAPE CURVE
RAPID GROWTH UPTO 2-3 YEARS
SLOW PHASE OF GROWTH 3-10 YEARS
RAPID PHASE OF GROWTH TERMINATING BY 18-
20 YEARS
www.indiandentalacademy.com
28. PRENATAL GROWTH OF
MAXILLA
Around the 4th
week of
intrauterine life a shallow
depression corresponds to
future mouth appears –
stomodeum.
Five branchial arches form in
region of future head and neck.
1st
branchial arch is called the
mandibular arch and place an
important role in development
of naso-maxillary region.
Stomodeum is overlapped
superiorly by frontonasal
process.
www.indiandentalacademy.com
29. The mandibular arches of both sides form lateral
walls of stomodium.
Mandibular arch gives off a bud from its dorsal end
called maxillary process.
Maxillary process grows ventro-medio-cranial to
mandibular arch to form mandibular process.
The mandibular process grow medially and fuse to
form the lower lip and lower jaw.
www.indiandentalacademy.com
30. DEVELOPMENT OF PALATE
Palate is formed by
contribution of –
1. Maxillary process.
2. Palatal shelves given off
by maxillary process.
3. Frontonasal process
www.indiandentalacademy.com
31. POSTNATAL GROWTH OF
MAXILLA
Post – natal growth of maxilla :
the growth of the naso-maxillary complex is
produced by the following mechanisms
Displacement
Growth at sutures
Surface remodeling
www.indiandentalacademy.com
32. Primary displacement
A primary type of
displacement is seen in a
forward direction by growth of
the maxillary tuberosity in a
posterior direction. This results
in the whole maxilla being
carried anteriorly. The amount
of this forward displacement
equals the amount of posterior
lengthening. This is a primary
type of displacement as the
bone is displaced by its own
enlargement.www.indiandentalacademy.com
33. A passive or secondary
displacement of the naso-
maxillary complex occurs in a
downward and forward direction
as the cranial base grows. The
nasomaxillary complex is simply
moved anteriorly as the middle
cranial fossa grows in that
direction.
www.indiandentalacademy.com
34. GROWTH AT SUTURES
The maxilla is connected to the cranium
and cranial base by a number sutures which
include
Fronto – nasal suture
Fronto – maxillary suture
Zygomatico – temporal suture
Zygomatico – maxillary suture
Pterygo – palatine suture
www.indiandentalacademy.com
35. These sutures are all oblique and more or less
parallel to each other. This allows the downward and
forward repositioning of the maxilla as growth occurs
at these sutures.
As growth of the surrounding soft tissue occurs,
the maxilla is carried downwards and forwards. This
leads to opening up of space at the sutural
attachments. New bone is formed on either side of
the suture. Thus the overall size of the bones on
either side increases. Hence a tension related bone
formation occurs at the sutures
www.indiandentalacademy.com
36. SURFACE REMODELLING
In addition to the growth occurring at the sutures
massive remodeling by bone deposition and
resorption occurs to bring about
Increase in size
Change in shape of bone
Change in functional relationship
www.indiandentalacademy.com
37. BONE REMODELLING CHANGES SEEN
IN THE NASO MAXILLARY COMPLEX
The floor of the orbit faces
superiorly, laterally and anterioirly .
surface deposition occurs here
resulting in growth in a superior,
lateral and anterior direction.
Bone deposition occurs along the
posterior margin of the maxillary
tuberosity causing lengthening of
the dental arch and enlargement
of the A-P dimension of the entire
maxillary body. This helps in
accommodating the erupting
molar. www.indiandentalacademy.com
38. Bone resorption occurs on the
lateral wall of the nose leading
to an increase in size of the
nasal cavity.
Bone resorption is seen on the
floor of the nasal cavity. To
compensate this, there is bone
deposition on the palatal side.
Thus a net downward shift
occurs leading to increase in
maxillary height
www.indiandentalacademy.com
39. The zygomatic bone
moves in a posterior
direction. This is achieved
by resorption on the
anterior surface and
deposition on the
posterior surface.
The face enlarges in
width by bone formation
on the lateral surface of
the zygomatic arch and
resorption on its medial
surface. www.indiandentalacademy.com
40. As the teeth starts erupting, bone deposition
occurs at the alveolar margins which increases the
maxillary height and the depth of the palate.
The entire wall of the sinus except the mesial wall
undergoes resorption, resulting in increase in size
of the maxillary antrum.
www.indiandentalacademy.com
41. AGE CHANGES IN MAXILLA
At birth
The transverse and sagital maxillary dimension
are greater than the vertical
The frontal process is prominent
The body consists of little more than alveolar
process, its alveoli reaching almost to the orbital
floor
Maxillary sinus is a mere furrow on the lateral
nasal wall.
www.indiandentalacademy.com
42. In Adults : The vertical diameter is greatest owing
to the development of the alveolar process and
enlargement of the sinus
In the old age
If all teeth are lost, the bone reverts to the infantile
shape. Its height diminishes, the alveolar process is
absorbed and lower parts of the bone contracted and
reduced in thickness at the expense of the labial wall
www.indiandentalacademy.com
43. GROWTH AND
DEVELOPMENT OF THE
MANDIBLE
PRE NATAL GROWTH
POST NATAL GROWTH
AGE CHANGES IN MANDIBLE
ANOMALIES OF DEVELOPMENT
PROSTHODONTIC
CONSIDERATIONS
www.indiandentalacademy.com
49. 10 week - condylar cartilage
Appears in the Ramal region
Endochondral bone
(14 week)
www.indiandentalacademy.com
50. Condylar Cartilage
Serves as a growth site
Brings changes in the mandibular position and form
Growth increases during puberty
Peak 12 – 14 years
Ceases by 20 years
www.indiandentalacademy.com
51. 7 th
month IUL
1 or 2 small cartilages appear in the future mental
region
Mental ossicles
Incorporated into the intramembranous bone of
symphsis
www.indiandentalacademy.com
52. Features of neonatal mandible
Ascending Ramus low and wide
Large Coronoid process
Body – open shell containing tooth buds and partially
formed deciduous teeth
Mandibular canal that runs low in the body
www.indiandentalacademy.com
58. Mental Protuberance
Formed by mental ossicles from accessory
cartilage and ventral end of Meckel’s cartilage
Poorly developed in infants
www.indiandentalacademy.com
59. Forms by osseous
deposition during
childhood
Prominence is
accentuated by
bone resorption
above it
www.indiandentalacademy.com
61. Alveolar process
Adds to the height and
thickness of the
mandibular body
Teeth absent
fails to develop
Teeth extracted
resorbs
www.indiandentalacademy.com
62. Condylar cartilage
Secondary cartilage
Important contribution to the overall
length of the mandible
www.indiandentalacademy.com
63. CONDYLE
IMPORTANT GROWTH SITE OF
MANDIBLE
EARLIER BELIEVED GROWTH
OCCUARS BY MEANS OF BONE
DEPOSITION CONDYLE GROWS
TOWARDS CRANIAL BASE
NOW BELIEVED GROWTH OCCUARS
DUE TO CARRYAWAY
PHENOMENON
www.indiandentalacademy.com
64. Lingual Tuberosity
Grows posterior
and medial by
deposition
Resorptive field
below-
Lingual fossa
www.indiandentalacademy.com
65. Coronoid Process
Lingual surface
Follows ‘v’ principle
POSTERIOR
SUPERIOR
MEDIALLY
www.indiandentalacademy.com
66.
‘ v ‘
principle of
Enlow
CORONOID PROCESS
www.indiandentalacademy.com
70. Superior part of
ramus below sigmoid
notch
Lower part of ramus
below the Coronoid
process
BUCCAL -
DEPOSITION
LINGUAL -
RESORPTION
LINGUAL
-DEPOSITION
BUCCAL -
RESORPTION
www.indiandentalacademy.com
72. Posterior border of Ramus
Depository and keeps pace
with condylar growth
Angle of growth
Posterior margin below
condyle --resorptive field
vertical horizontal
www.indiandentalacademy.com
77. Mandibular foramen
Ramus -- posterior and
superior direction
Mandibular foramen
drifts in backward &
upward direction
www.indiandentalacademy.com
78. Ramal growth
Backward transportation of entire ramus –
elongation of mandibular body.
Displacement of body–anterior direction.
Vertical lengthening of ramus as mandible is
displaced.
www.indiandentalacademy.com
79. Role of muscles in
Mandibular growth
CORONOID Temporalis
RAMUS and
GONIAL ANGLE Masseter & Medial
pterygoid
CONDYLE internal pterygoid
MOSS
www.indiandentalacademy.com
80. AGE CHANGES IN
MANDIBLE
AT BIRTH :
The two halves of the mandible are united by a
fibrous symphysis menti.
At this stage the body is a mere shell, enclosing
imperfectly separated sockets of deciduous teeth.
The mandibular canal is near the lower border
The mental foramen opens below the first deciduous
molar and is directed forwards.
The coronoid process projects above the condyle
The angle of the mandible is obtuse (above
140degrees or more) because the head is in line with
the body.
www.indiandentalacademy.com
82. IN ADULTS:
The mental foramen opens midway between the
upper and lower borders
The mandibular canal nearly parallels the mylohyoid
line
The angle of mandible is 110-120 degrees
www.indiandentalacademy.com
83. In OLD AGE :
Bone is reduced in size as teeth are lost and alveolar
region resorbed
The mandibular canal and the mental foramen are
nearer the superior border
The ramus becomes oblique as angle becomes
obtuse (140degrees) and the neck inclined
backwards.
www.indiandentalacademy.com
84. DEVELOPMENTAL
DISTURBANCES
Cleft lip and cleft palate
cleft lip occurs due to failure of fusion of
maxillary process with the medial and lateral nasal
process.
cleft palate is due to failure of fusion between
maxillary process and frontonasal process.
www.indiandentalacademy.com
88. Agnathia : Agnathia is an extremely rare
congenital defect characterized by absence of
the maxilla or mandible. More commonly only a
portion of one jaw is missing.
Micrognathia : It likely means a small jaw.
Many cases of apparent micrognathia are due
not to an abnormally small jaw in terms of
absolute size, but rather to an abnormal
positioning or an abnormal relation of one jaw to
the other or to the skull which produces the
illusion of micrognathia.
www.indiandentalacademy.com
89. Macrognathia : It refers to the condition of
abnormally large jaws. It may be associated with
Pagets disease
Acromegaly
Leontiasis ossea, a form of fibrous dysplasia.
Facial hemihypertrophy :- Here there is a very
mild degree of facial asymmetry. The etiology is
unknown, but it may be due to
Hormonal imbalance
Incomplete twinning
Chromosomal abnormalities
Vascular abnormalities and
Neurogenic abnormalities
www.indiandentalacademy.com
90. Here there is enlargement of one half of the head.
This disproportion may be seen with birth and may be
maintained throughout life.
The dentition of the hypertrophic side, is abnormal in
three respects.
Crown size
Root size and shape
Rate of development
There is no specific treatment except for cosmetic
repair.
www.indiandentalacademy.com
91. Facial hemiatrophy : (Parry-Romberg syndrome;
romberg syndrome; Hemifacial atrophy)
It is a progressive atrophy of some or all of the
tissues on one side of the face, occasionally
extending to other parts of the body. The etiology is
unknown.
As the dental effects the hemiatrophy of the lips
and the tongue is reported, the roots of the teeth may
exhibit deficiency of root development and reduced
growth of the jaws on the affected side. Eruption of
teeth on the affected side may also be retarded.
There is no specific treatment.
www.indiandentalacademy.com
92. PROSTHODONTIC
CONSIDERATIONS
BOUCHER :
During 1st year after extraction, the reduction of
residual ridge height is about 2-3 mm for maxilla and
4-5 mm for mandible. After healing resorption
continues but with decreased intensity. Rate of
reduction in maxilla annually is generally 4 times less
than mandibular (about 0.1-0.2 mm).
www.indiandentalacademy.com
93. One of the dental problem in an aged is excessive
bone resorption. The supporting bony tissue
undergoes resorption to a greater or lesser degree.
The crest of the residual alveolar ridge is usually
found to be concave or flat and can terminate in a
knife edge. In extreme cases the layer of bone
overlying mandibular canal may be resorbed
completely leaving a thin layer of oral epithelium as
the only protection to the exposed canal.
www.indiandentalacademy.com
94. A potential source of discomfort in marked senile
atrophy is compression of nerve ending between
sharp vertical bony projections & thin mucosal
covering by a hard denture base particularly in the
anterior mandibular region. The soft tissue is unable
to distribute forces during mastication.
The presence of denture on an exposed mental
nerve emerging form mental foramen can cause pain
and paresthesia of lower lip and chin. Pressure on
mandibular canal by a prosthesis can also be most
annoying to the patient. Best treatment is careful
relief.
www.indiandentalacademy.com
95. CONCLUSION
“Life is change; for when you are through changing,
you are through” – BRUCE BARTON
As moyers defined growth as the normal
changes in the amount of living substance and
development as the normal sequential events that
encompass between fertilization and death. A
knowledge of growth and development is the
precious key to grasp and the form and direction of
anatomical structures. It is a vital key to the mastery
of the aberrant as well as the normal.
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