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.
Stability in complete /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
Stability and support in complete dentures/ dentistry dental implantsIndian dental academy
The document discusses factors that contribute to the stability of complete dentures, including retention, stability, and support. Stability specifically refers to the denture's ability to withstand horizontal forces and resist displacement. Key factors that affect stability include the quality and height of the residual ridge, accuracy of the impression, orientation of the occlusal plane, arrangement of teeth, and contour of the polished surfaces. An optimal outcome relies on incorporating retentive, stabilizing, and supportive features into the prosthesis.
This document discusses factors that influence the stability of complete dentures. It defines stability as the quality of a removable prosthesis to resist displacement from functional stresses. The three main factors discussed are:
1) The relationship of the denture base to underlying tissues - Proper adaptation of the denture base to the residual ridges and surrounding tissues improves stability.
2) The relationship of the denture borders to surrounding muscles - Contouring the denture to allow free function of muscles like the buccinator and allowing muscles to help seat the denture enhances stability.
3) The relationship of opposing occlusal surfaces - Proper occlusal harmony contributes to resisting forces that could displace the dentures.
Principles of support stability and retention in complete denturesStephen Kinose
This document discusses principles of retention, support and stability in complete dentures. It defines retention as the ability of a denture to resist displacement when removed from the mouth. Primary retention involves physical forces like adhesion, cohesion, surface tension and atmospheric pressure between the denture, saliva and mucosa. Mechanical retention adds modifications to the denture like undercuts or attachments. Stability is the ability to resist horizontal or rotational forces, influenced by factors like ridge size and quality. Support is resistance to vertical displacement, provided by areas like the hard palate, tuberosities and residual ridges.
Stability in complete denture / dental implant 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.for more details please visit
www.indiandentalacademy.com
Stability /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
1. Stability in complete dentures is influenced by factors like residual ridge anatomy, quality of soft tissues, impression quality, occlusal planes, tooth arrangement, and contour of the polished surface.
2. Various muscles like the buccinator, orbicularis oris, and mentalis can impact denture stability if the denture borders and contours do not allow for proper function.
3. Establishing balanced occlusion is important for stability, as imbalanced forces can displace the denture during jaw movement.
This document provides an overview of factors affecting the stability of complete dentures. It defines stability and discusses several key factors, including:
- Residual ridge anatomy (height, shape, arch form)
- Denture base adaptation to underlying tissues
- Relationship of denture bases to muscles like the buccinator and mylohyoid
- Opposing occlusal surfaces
- Contours and extensions of denture borders
Stability results from a balance of forces from muscles that can displace dentures and those that resist displacement. Proper consideration of these anatomic and muscular factors during denture fabrication can enhance stability.
Stability in complete /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
Stability and support in complete dentures/ dentistry dental implantsIndian dental academy
The document discusses factors that contribute to the stability of complete dentures, including retention, stability, and support. Stability specifically refers to the denture's ability to withstand horizontal forces and resist displacement. Key factors that affect stability include the quality and height of the residual ridge, accuracy of the impression, orientation of the occlusal plane, arrangement of teeth, and contour of the polished surfaces. An optimal outcome relies on incorporating retentive, stabilizing, and supportive features into the prosthesis.
This document discusses factors that influence the stability of complete dentures. It defines stability as the quality of a removable prosthesis to resist displacement from functional stresses. The three main factors discussed are:
1) The relationship of the denture base to underlying tissues - Proper adaptation of the denture base to the residual ridges and surrounding tissues improves stability.
2) The relationship of the denture borders to surrounding muscles - Contouring the denture to allow free function of muscles like the buccinator and allowing muscles to help seat the denture enhances stability.
3) The relationship of opposing occlusal surfaces - Proper occlusal harmony contributes to resisting forces that could displace the dentures.
Principles of support stability and retention in complete denturesStephen Kinose
This document discusses principles of retention, support and stability in complete dentures. It defines retention as the ability of a denture to resist displacement when removed from the mouth. Primary retention involves physical forces like adhesion, cohesion, surface tension and atmospheric pressure between the denture, saliva and mucosa. Mechanical retention adds modifications to the denture like undercuts or attachments. Stability is the ability to resist horizontal or rotational forces, influenced by factors like ridge size and quality. Support is resistance to vertical displacement, provided by areas like the hard palate, tuberosities and residual ridges.
Stability in complete denture / dental implant 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.for more details please visit
www.indiandentalacademy.com
Stability /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
1. Stability in complete dentures is influenced by factors like residual ridge anatomy, quality of soft tissues, impression quality, occlusal planes, tooth arrangement, and contour of the polished surface.
2. Various muscles like the buccinator, orbicularis oris, and mentalis can impact denture stability if the denture borders and contours do not allow for proper function.
3. Establishing balanced occlusion is important for stability, as imbalanced forces can displace the denture during jaw movement.
This document provides an overview of factors affecting the stability of complete dentures. It defines stability and discusses several key factors, including:
- Residual ridge anatomy (height, shape, arch form)
- Denture base adaptation to underlying tissues
- Relationship of denture bases to muscles like the buccinator and mylohyoid
- Opposing occlusal surfaces
- Contours and extensions of denture borders
Stability results from a balance of forces from muscles that can displace dentures and those that resist displacement. Proper consideration of these anatomic and muscular factors during denture fabrication can enhance stability.
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.
This document discusses the definition and factors affecting the stability of dentures. It defines stability as the ability to resist displacement from functional stresses. The main factors that influence stability are: quality of impression, height of residual ridge, palatal vault shape, arch form, soft tissue quality, lingual flange, occlusal plane, tooth arrangement, polished surface contour, and oral musculature. An accurate impression is important for stability, as is sufficient residual ridge height. Stability is assessed by applying pressure to check for denture tilting.
Support in complete denture /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.for more details please visit
www.indiandentalacademy.com
Support in complete dentures /certified fixed orthodontic courses by Indian d...Indian dental academy
The document discusses support for complete dentures. It defines support as resistance to vertical forces from mastication and occlusion. Support is achieved initially through impression procedures that displace resilient tissues and record tissues in their loaded shape, and long term by directing forces toward tissues resistant to remodeling. The maxillary hard palate and mandibular buccal shelf provide primary support, while relief is needed for thin mucosa. Impression techniques aim to equalize pressure and minimize localized forces that could cause resorption.
Retention,stability& support in dentures / dental implant courses by Indian d...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
This document discusses factors that affect stability in complete dentures. It defines stability as resistance to horizontal or rotational forces, as opposed to vertical forces which relate to retention. Key factors discussed include denture base adaptation, coverage of supporting tissues, flange design and muscle function. The concepts of neutral zone and modiolus are also introduced as relating to stability by balancing forces from surrounding muscles.
The document discusses factors that influence retention of complete dentures. It defines retention as the resistance of a denture to dislodging forces. Retention is provided by physical factors like adhesion, cohesion, and surface tension; physiological factors like muscle control and saliva; and mechanical factors like undercuts, occlusion, and denture adhesives. Proper design of denture surfaces and incorporation of these retention factors is necessary for optimal denture function and patient satisfaction.
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 balanced occlusion in complete dentures. It begins by defining key terms like balance, occlusion, articulation and maximum intercuspal position. It describes the different types of occlusion including centric, eccentric, functional and non-functional. The requirements and theories of complete denture occlusion are explained. The concepts of balanced, monoplane and lingualized occlusion are introduced. Steps for achieving balanced occlusion include teeth arrangement, selective grinding and avoiding errors. Balanced occlusion aims to improve stability, reduce resorption and improve comfort through simultaneous bilateral contacts.
Presentation1 support for complete denturePratik Hodar
1. The document discusses support in complete denture prosthesis, including definitions, types, importance, anatomical considerations of supporting tissues, and factors affecting support.
2. Key anatomical considerations for support include the oral mucosa, denture supporting areas in the maxilla and mandible, and bone. Primary stress bearing areas in the maxilla are the hard palate and tuberosities while in the mandible they are the buccal shelf and retromolar pad.
3. Factors affecting denture support include the health of the oral tissues, forces from occlusion and musculature, ridge resorption, and the quality of the impression and denture fit. Support can be improved by techniques that distribute forces
The document discusses concepts of complete denture occlusion including the differences between natural dentition and dentures, goals of denture occlusion, types of occlusion including bilateral balance and monoplane, factors affecting occlusion balance, and considerations for posterior tooth forms including anatomic versus lingualized teeth. Bilateral balance aims to limit denture tipping during parafunctional movements and can be achieved with anatomic or non-anatomic posterior teeth using techniques like balancing ramps.
The neutral zone concept aims to position artificial teeth in the edentulous mouth in an area where the forces exerted by muscles will stabilize the denture rather than dislodge it.
This document discusses the monoplane occlusion scheme with balancing ramps for complete dentures. It begins by explaining that monoplane occlusion attempts to minimize tipping forces by reducing inclined plane contacts between the maxillary and mandibular teeth. Balancing ramps are added to counteract forces from Christiansen's phenomenon. The document then provides step-by-step instructions for setting up the anterior and posterior teeth in the maxilla and mandible to achieve the monoplane scheme, including positioning the balancing ramp.
This document provides an overview of balanced occlusion and its importance in complete denture fabrication. It defines key terms like balanced occlusion, centric occlusion, eccentric occlusion, and discusses various theories of occlusion. It describes the requirements and goals of balanced occlusion in complete dentures. Various concepts of balanced occlusion are outlined, including those proposed by Gysi, Sears, French, Pleasure, Frush, Hanau and others. The document discusses the advantages of bilateral balanced occlusion and factors that affect achieving balanced occlusion in complete dentures.
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 the concept of the neutral zone in dentistry. It defines the neutral zone as the area in the mouth where forces of the tongue pressing outward are balanced by forces of the cheeks and lips pressing inward during function. It describes how the neutral zone determines the stable position of teeth and affects factors like denture stability, function, and longevity. The muscles of the cheeks, lips, and tongue shape the neutral zone and influence dental restoration outcomes. Finding the neutral zone is important for optimal function and aesthetics.
This document discusses occlusion and its study. It begins by defining occlusion and centric relation. It describes studying occlusion by examining dental arch formation, compensatory curves, tooth angulations, functional tooth form, and tooth relationships in centric occlusion. Key points include the first permanent molars acting as the "key of occlusion," compensatory curves guiding mandibular movement, and Angle's classification of malocclusions. Studying occlusion is important for treating malocclusions and TMJ issues as well as constructing dental restorations.
The document discusses different concepts of complete denture occlusion including:
1. Bilateral balanced occlusion aims to limit tipping of dentures during parafunctional movements by having simultaneous contact on both sides in centric relation.
2. Other types discussed are monoplane (neutrocentric) occlusion and lingualized occlusion, which may centralize forces and minimize tipping.
3. Factors like condylar inclination, incisal guidance, cuspal inclination, and compensating curve affect occlusal balance, though investigators have not proven one type of occlusion superior.
this ppt will give you complete in depth information about how establish occlusion removable partial dentures. we have got residentila courses for prosthodontics where in complete training will be provided on patient
This document discusses the evolution of occlusion concepts in dentistry. It begins with definitions of key occlusion terms and reviews various occlusion schemes that have been proposed over time, including lingualized occlusion, linear occlusion, and concepts put forth by Bonwill, Von Spee, Monson, and others. Requirements for artificial occlusion are outlined. The document emphasizes the differences between natural occlusion and artificial occlusion for complete dentures. Posterior tooth forms and concepts of occlusion are also examined.
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.
This document discusses the definition and factors affecting the stability of dentures. It defines stability as the ability to resist displacement from functional stresses. The main factors that influence stability are: quality of impression, height of residual ridge, palatal vault shape, arch form, soft tissue quality, lingual flange, occlusal plane, tooth arrangement, polished surface contour, and oral musculature. An accurate impression is important for stability, as is sufficient residual ridge height. Stability is assessed by applying pressure to check for denture tilting.
Support in complete denture /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.for more details please visit
www.indiandentalacademy.com
Support in complete dentures /certified fixed orthodontic courses by Indian d...Indian dental academy
The document discusses support for complete dentures. It defines support as resistance to vertical forces from mastication and occlusion. Support is achieved initially through impression procedures that displace resilient tissues and record tissues in their loaded shape, and long term by directing forces toward tissues resistant to remodeling. The maxillary hard palate and mandibular buccal shelf provide primary support, while relief is needed for thin mucosa. Impression techniques aim to equalize pressure and minimize localized forces that could cause resorption.
Retention,stability& support in dentures / dental implant courses by Indian d...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
This document discusses factors that affect stability in complete dentures. It defines stability as resistance to horizontal or rotational forces, as opposed to vertical forces which relate to retention. Key factors discussed include denture base adaptation, coverage of supporting tissues, flange design and muscle function. The concepts of neutral zone and modiolus are also introduced as relating to stability by balancing forces from surrounding muscles.
The document discusses factors that influence retention of complete dentures. It defines retention as the resistance of a denture to dislodging forces. Retention is provided by physical factors like adhesion, cohesion, and surface tension; physiological factors like muscle control and saliva; and mechanical factors like undercuts, occlusion, and denture adhesives. Proper design of denture surfaces and incorporation of these retention factors is necessary for optimal denture function and patient satisfaction.
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 balanced occlusion in complete dentures. It begins by defining key terms like balance, occlusion, articulation and maximum intercuspal position. It describes the different types of occlusion including centric, eccentric, functional and non-functional. The requirements and theories of complete denture occlusion are explained. The concepts of balanced, monoplane and lingualized occlusion are introduced. Steps for achieving balanced occlusion include teeth arrangement, selective grinding and avoiding errors. Balanced occlusion aims to improve stability, reduce resorption and improve comfort through simultaneous bilateral contacts.
Presentation1 support for complete denturePratik Hodar
1. The document discusses support in complete denture prosthesis, including definitions, types, importance, anatomical considerations of supporting tissues, and factors affecting support.
2. Key anatomical considerations for support include the oral mucosa, denture supporting areas in the maxilla and mandible, and bone. Primary stress bearing areas in the maxilla are the hard palate and tuberosities while in the mandible they are the buccal shelf and retromolar pad.
3. Factors affecting denture support include the health of the oral tissues, forces from occlusion and musculature, ridge resorption, and the quality of the impression and denture fit. Support can be improved by techniques that distribute forces
The document discusses concepts of complete denture occlusion including the differences between natural dentition and dentures, goals of denture occlusion, types of occlusion including bilateral balance and monoplane, factors affecting occlusion balance, and considerations for posterior tooth forms including anatomic versus lingualized teeth. Bilateral balance aims to limit denture tipping during parafunctional movements and can be achieved with anatomic or non-anatomic posterior teeth using techniques like balancing ramps.
The neutral zone concept aims to position artificial teeth in the edentulous mouth in an area where the forces exerted by muscles will stabilize the denture rather than dislodge it.
This document discusses the monoplane occlusion scheme with balancing ramps for complete dentures. It begins by explaining that monoplane occlusion attempts to minimize tipping forces by reducing inclined plane contacts between the maxillary and mandibular teeth. Balancing ramps are added to counteract forces from Christiansen's phenomenon. The document then provides step-by-step instructions for setting up the anterior and posterior teeth in the maxilla and mandible to achieve the monoplane scheme, including positioning the balancing ramp.
This document provides an overview of balanced occlusion and its importance in complete denture fabrication. It defines key terms like balanced occlusion, centric occlusion, eccentric occlusion, and discusses various theories of occlusion. It describes the requirements and goals of balanced occlusion in complete dentures. Various concepts of balanced occlusion are outlined, including those proposed by Gysi, Sears, French, Pleasure, Frush, Hanau and others. The document discusses the advantages of bilateral balanced occlusion and factors that affect achieving balanced occlusion in complete dentures.
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 the concept of the neutral zone in dentistry. It defines the neutral zone as the area in the mouth where forces of the tongue pressing outward are balanced by forces of the cheeks and lips pressing inward during function. It describes how the neutral zone determines the stable position of teeth and affects factors like denture stability, function, and longevity. The muscles of the cheeks, lips, and tongue shape the neutral zone and influence dental restoration outcomes. Finding the neutral zone is important for optimal function and aesthetics.
This document discusses occlusion and its study. It begins by defining occlusion and centric relation. It describes studying occlusion by examining dental arch formation, compensatory curves, tooth angulations, functional tooth form, and tooth relationships in centric occlusion. Key points include the first permanent molars acting as the "key of occlusion," compensatory curves guiding mandibular movement, and Angle's classification of malocclusions. Studying occlusion is important for treating malocclusions and TMJ issues as well as constructing dental restorations.
The document discusses different concepts of complete denture occlusion including:
1. Bilateral balanced occlusion aims to limit tipping of dentures during parafunctional movements by having simultaneous contact on both sides in centric relation.
2. Other types discussed are monoplane (neutrocentric) occlusion and lingualized occlusion, which may centralize forces and minimize tipping.
3. Factors like condylar inclination, incisal guidance, cuspal inclination, and compensating curve affect occlusal balance, though investigators have not proven one type of occlusion superior.
this ppt will give you complete in depth information about how establish occlusion removable partial dentures. we have got residentila courses for prosthodontics where in complete training will be provided on patient
This document discusses the evolution of occlusion concepts in dentistry. It begins with definitions of key occlusion terms and reviews various occlusion schemes that have been proposed over time, including lingualized occlusion, linear occlusion, and concepts put forth by Bonwill, Von Spee, Monson, and others. Requirements for artificial occlusion are outlined. The document emphasizes the differences between natural occlusion and artificial occlusion for complete dentures. Posterior tooth forms and concepts of occlusion are also examined.
Methods to improve com[lete denture foundation 2Anish Amin
The document discusses various methods to improve the denture foundation for complete dentures. It describes how edentulism can alter the maxillomandibular relationship and residual ridge resorption. Various classification systems for residual alveolar ridges are provided. Both non-surgical and surgical preprosthetic procedures are discussed in detail, including ridge augmentation techniques and implant procedures. The goal of preprosthetic treatment is to modify the oral environment to support dentures and restore form and function.
Bone & Its Importance to ProsthodontistSelf employed
Bone is a hard connective tissue that forms the skeleton. It has an inorganic mineral component made up of calcium salts and an organic collagen matrix. Bone comes in two types - dense cortical bone forming the hard outer shell and spongy cancellous bone on the inside. Bone is constantly remodeled through the actions of bone-forming osteoblasts and bone-resorbing osteoclasts. Diseases like osteoporosis weaken the bones through decreased bone density while Paget's disease involves abnormal bone deposition and resorption.
The document discusses the neutrocentric concept for arranging teeth in complete dentures. The neutrocentric concept proposes using flat teeth without any inclines in any direction to minimize forces that could cause denture instability. The key aspects are using a single flat plane of occlusion parallel to the residual ridges and eliminating cusps and inclines on posterior teeth to direct forces towards the supporting tissues. This concept aims to preserve residual ridge integrity by preventing destructive forces.
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.
Temporomandibular joint anatomy and its prosthodontic implicationsFALAKNAZ121
Temporomandibular joint described in detail along with prosthodontic implications under the headings INTRODUCTION
DEFINITION
PECULIARITY OF TMJ
DEVELOPMENT
ANATOMIC COMPONENTS
VASCULAR SUPPLY
INNERVATIONS
MOVEMEN
BIOMECHANICS
PROSTHODONTIC IMPLICATIONS
REFERENCES
This document discusses residual ridge resorption (RRR), which is the ongoing loss of jawbone that occurs after tooth extraction. It begins with definitions and an overview of the extraction healing process. It then covers the basic bone structure, cells involved in bone remodeling, and the mechanisms of bone resorption. The pathology, pathophysiology, and pathogenesis of RRR are explained. Changes to the maxilla and mandible due to RRR are described. The document lists anatomical, metabolic, functional, and prosthetic factors that contribute to RRR and discusses its epidemiology and etiology.
The temporomandibular joint (TMJ) is a bilateral joint that connects the mandible to the temporal bone. It has several unique characteristics, including being the only joint with a rigid endpoint of closure. The TMJ has bony, fibrous, and muscular components that allow for hinge, protrusive, and lateral movements. Prosthodontic treatments must consider the anatomy and biomechanics of the TMJ.
Tongue is a muscular structure that has the organs of taste reception. The organs for sense of taste are the taste buds. Tongue is located inside the mouth and is an important muscle. It does not have any bones. It is reddish-pink in color. The main function of tongue is taste, help in chewing food, in swallowing food and speech.
The document discusses residual ridge resorption (RRR), which is the progressive loss of jaw bone after tooth extraction. It defines RRR and provides classifications. RRR is considered a pathological process due to its variability between individuals. The document covers the epidemiology, etiology, and risk factors of RRR, including anatomical, mechanical, metabolic and prosthetic factors. Treatment aims to prevent or reduce RRR through denture design and patient education.
Bone is a mineralized connective tissue that forms the endoskeleton of vertebrates. It has both compact and spongy structures and develops through either membranous or endochondral ossification. Bone is made up of osteoprogenitor cells, osteoblasts, osteocytes, and osteoclasts. Osteoblasts form new bone tissue while osteoclasts resorb old or damaged bone. The intricate blood supply through nutrient arteries is essential for bone growth and healing. Fractures heal through the formation of a hematoma, fibrocartilaginous callus, bony callus, and remodeling into secondary bone.
This document discusses important anatomical landmarks for complete dentures in the maxilla and mandible. It describes 14 maxillary landmarks including the labial and buccal frenums, vestibules, alveolar ridge, tuberosity, hamular notch, hard palate features, and rugae. It also describes 9 mandibular landmarks like the labial and lingual frenums and vestibules, buccal shelf area, retromolar pad, and pear shaped pad. Understanding these landmarks is essential for proper denture fit and function as well as preservation of underlying tissues.
This document provides an overview of bone physiology. It begins with definitions of bone and its functions, including supporting the body, protecting organs, and allowing movement. It then covers the classification, anatomy, histology, composition, growth and remodeling of bone. Key points include that bone is made up of inorganic minerals and organic collagen matrix, and is in a constant state of breakdown and formation through the actions of osteoclasts and osteoblasts, maintaining homeostasis. The document provides details on intramembranous and endochondral ossification, as well as the structure of alveolar bone and its importance for dentistry.
The document discusses various concepts related to complete denture occlusion including:
- The history of dental occlusion in mammals and its development.
- Andrews' six keys to normal occlusion which are seen in natural dentition.
- Differences between natural tooth occlusion and artificial denture occlusion.
- Various occlusal schemes for complete dentures including balanced, lingualized, and monoplane occlusion.
- Requirements for incisive, working, and balancing units in occlusal schemes.
This document discusses factors that affect the stability of complete dentures. It defines stability as the ability of a denture to resist horizontal or rotational forces. The key factors discussed are:
1) The relationship of the denture base to the underlying tissues, including accurate impressions, border extension, ridge anatomy and orientation.
2) The relationship of the denture's external surface and periphery to surrounding muscles, including allowing for muscle function and using muscles to enhance stability.
3) The relationship of opposing occlusal surfaces, including occlusal schemes, tooth position, and ridge relationships.
Balanced occlusion / dental implant courses by Indian dental academy Indian dental academy
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
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.
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
Principles of design.ppt1.ppt2 /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.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
Gypsum (calcium sulphate dihydrate) is a naturally occurring mineral used in dentistry to fabricate models (Figure 12.1a), casts and dies (Figure 12.1b). Calcination is the process of heating the gypsum to dehydrate it (partially or completely) to form calcium sulphate hemihydrate. Plaster and stone are products of the dehydration process. It is the calcination process that determines the strength of the gypsum material. The differences in the types of gypsum are related to the amount of water removed, resulting in varying densities and particle sizes of the material.
Gypsum materials are combined with water and spatulated to create a slurried mixture that is poured into a dental impression (negative reproduction of the teeth and surrounding tissues). It is allowed to set, after which the gypsum and impression are separated, resulting in the positive reproduction of the patient’s tooth/teeth, arch and surrounding tissues. Many dental appliances and restorations are constructed extra-orally using models, dies (one tooth) and casts (replicas of the patients tooth/teeth and surrounding tissues).
It is desirable that all gypsum products are strong, compatible with impression materials and waxes and fluid at the time of pouring into the impression; they should also have good dimensional stability.
impression techniques of complete dentureakanksha arya
The document discusses impression techniques for complete dentures. It defines key terms like impression, complete denture impression, and preliminary impression. It explains the objectives of impression making including retention, stability, support, esthetics, and preservation of remaining structures. It also covers different classification systems for impressions based on theories, materials used, technique, purpose, and tray type. Specific impression techniques like open mouth, closed mouth, and selective pressure are described.
vertical jaw relationships / dental implant 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.for more details please visit
www.indiandentalacademy.com
This document discusses balanced occlusion in complete dentures. It defines balanced occlusion and describes its importance for denture stability. The document outlines various concepts that have been proposed to achieve balanced occlusion, including those by Gysi, French, Sears, Pleasure, Frush, and Hanau. It discusses factors like condylar guidance, incisal guidance, cusp height, and compensating curves that influence balanced occlusion. The document emphasizes that balanced occlusion allows for even distribution of forces across the dental arch during various jaw movements.
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.
Conservative prosthodontic procedures to improve mandibular denture stability...Aswati Soman
This document discusses factors that affect stability in mandibular dentures for patients with resorbed mandibular ridges. It outlines several key factors including retention, diagnosis of tongue position, functions of the mouth, denture base outline, occlusal plane, arch arrangement, and patient education. It also describes various techniques to improve stability, such as overdentures, using the neutral zone concept, dynamic impression methods, metal denture bases, neutrocentric and linear occlusal schemes, single-stage border molding, and dental implants. The conclusion states that understanding all factors involved and creating a denture that fully covers the supporting ridge in harmony with muscles can significantly improve stability.
This document discusses balanced occlusion for complete dentures. It begins with an introduction that defines occlusion and the goal of reducing trauma to supporting tissues. It then defines various occlusion terms like centric occlusion, eccentric occlusion, functional occlusion, and balanced occlusion. The document discusses theories of complete denture occlusion and various concepts like balanced, monoplane, and lingualized occlusion. It outlines the objectives, characteristics, types, advantages, and factors influencing balanced occlusion. The factors discussed are condylar guidance, incisal guidance, plane of occlusion, cuspal angulation, and compensating curve. The document provides details on each of these factors and their significance in achieving balanced occlusion.
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
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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
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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,
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Use of modified tooth forms in complete denture occlusion / dental implant...Indian dental academy
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.
Similar to Stability/ dentistry dental implants (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.
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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.
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Dear Doctor,
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--
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
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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
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Properties of Denture base materials /rotary 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
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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
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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
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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
Dentalcasting alloys/certified fixed orthodontic courses by Indian dental aca...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
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Philippine Edukasyong Pantahanan at Pangkabuhayan (EPP) CurriculumMJDuyan
(𝐓𝐋𝐄 𝟏𝟎𝟎) (𝐋𝐞𝐬𝐬𝐨𝐧 𝟏)-𝐏𝐫𝐞𝐥𝐢𝐦𝐬
𝐃𝐢𝐬𝐜𝐮𝐬𝐬 𝐭𝐡𝐞 𝐄𝐏𝐏 𝐂𝐮𝐫𝐫𝐢𝐜𝐮𝐥𝐮𝐦 𝐢𝐧 𝐭𝐡𝐞 𝐏𝐡𝐢𝐥𝐢𝐩𝐩𝐢𝐧𝐞𝐬:
- Understand the goals and objectives of the Edukasyong Pantahanan at Pangkabuhayan (EPP) curriculum, recognizing its importance in fostering practical life skills and values among students. Students will also be able to identify the key components and subjects covered, such as agriculture, home economics, industrial arts, and information and communication technology.
𝐄𝐱𝐩𝐥𝐚𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐮𝐫𝐞 𝐚𝐧𝐝 𝐒𝐜𝐨𝐩𝐞 𝐨𝐟 𝐚𝐧 𝐄𝐧𝐭𝐫𝐞𝐩𝐫𝐞𝐧𝐞𝐮𝐫:
-Define entrepreneurship, distinguishing it from general business activities by emphasizing its focus on innovation, risk-taking, and value creation. Students will describe the characteristics and traits of successful entrepreneurs, including their roles and responsibilities, and discuss the broader economic and social impacts of entrepreneurial activities on both local and global scales.
Elevate Your Nonprofit's Online Presence_ A Guide to Effective SEO Strategies...TechSoup
Whether you're new to SEO or looking to refine your existing strategies, this webinar will provide you with actionable insights and practical tips to elevate your nonprofit's online presence.
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.
THE SACRIFICE HOW PRO-PALESTINE PROTESTS STUDENTS ARE SACRIFICING TO CHANGE T...indexPub
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.
Andreas Schleicher presents PISA 2022 Volume III - Creative Thinking - 18 Jun...EduSkills OECD
Andreas Schleicher, Director of Education and Skills at the OECD presents at the launch of PISA 2022 Volume III - Creative Minds, Creative Schools on 18 June 2024.
How Barcodes Can Be Leveraged Within Odoo 17Celine George
In this presentation, we will explore how barcodes can be leveraged within Odoo 17 to streamline our manufacturing processes. We will cover the configuration steps, how to utilize barcodes in different manufacturing scenarios, and the overall benefits of implementing this technology.
Temple of Asclepius in Thrace. Excavation resultsKrassimira Luka
The temple and the sanctuary around were dedicated to Asklepios Zmidrenus. This name has been known since 1875 when an inscription dedicated to him was discovered in Rome. The inscription is dated in 227 AD and was left by soldiers originating from the city of Philippopolis (modern Plovdiv).
3. CONTENTS
• INTRODUCTION.
• DEFINITION.
• FACTORS CONTRIBUTING
STABILITY:
I. The relationship of the denture
base to the underlying tissues.
II. The relationship of the external
surface and border to the
surrounding orofacial
musculature.
III. The relationship of the opposing
oclusal surfaces
IV. other
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8. • Retention resistance to vertical dislodgement
Stability resistance to horizontal forces
• Retention psychological comfort
Stability physiologic comfort
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9. Retention is the most spectacular yet probably
the least important of the three denture
properties
Stability is the most important of these
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11. Definition (GPT-8)
• STABILITY:-
• 1)That quality of maintaining a constant
character or position in the presence of forces
that threaten to disturb it; the quality of being
stable; to stand or endure.
• 2)The quality of a removable prosthesis to be
firm, steady or constant to resist
displacement by functional horizontal or
rotational stresses.
• 3) Resistance to horizontal displacement of
prosthesis.
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12. • Denture stability:-
• The resistance of a denture to movement on
its tissue foundation, especially to lateral
(horizontal) forces as opposed to vertical
displacement (termed denture retention).
• A quality of a denture that permits it to
maintain a state of equilibrium in relation to its
tissue foundation and/ or abutment teeth.
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13. Factors contributing to stability
• Ridge height.
• Base adaptation
• Residual ridge relationships
• Occlusal harmony
• Neuromuscular control
• Retention
• Proper form and contour of polished surface
• Patient education
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15. • FISH (1948) described three denture
surfaces.
• Tissue surface.
• Polished surface.
• Occlusal surface.
• All the three surfaces helps in
determining stability of the complete
denture.
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16. • The relationship of the denture base to
the underlying tissues.
• The relationship of the external surface
and border to the surrounding orofacial
musculature.
• The relationship of opposing occlusal
surfaces.
• Others.
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17. The relationship of the
denture base to the
underlying tissues.
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18. Residual ridge anatomy
• Retention is available to all patients
regardless of the condition of the
ridge……..
• But stability gets limited.
• A poor ridge simply indicates that its
inability to exert an equal and opposite
pressure against a functional force
tending to dislodge the denture.
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19. • Large, square, broad ridges offers a greater
resistance to lateral forces than do small,
narrowed tapered ridges.
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20. • Stability is mainly obtained by
incorporating the surfaces of the
maxillary and mandibular ridges which
are right angle to the occlusal plane.
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21. • The contacting of the labial and buccal flanges
with labial and buccal slopes is one of the
critical factors contributing stability.
• Small and rounded irregularities present on the
vertical walls of the ridges also contribute. So
alveoloplasty should be limited.
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22. • The arch form – square or tapered arches tends to
resist rotation of the prosthesis better than the ovoid
arches.
• Shape of palatal vault – stability is limited by the
length and angulations of the palatal ridge slopes.
• A steep or high arched palate enhances the stability
by providing greater area of contact and long inclines
approaching at right angle to the direction of force.
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24. Denture base adaptation
• The relationship of the tissue surface of the denture
base to the underlying tissues is dependent on the
impression procedures of the clinician.
• Maximum coverage without undue displacement of
tissue, the development of a good border seal, and
close adaptation helps in improving stability.
• Maximum buccal extension of the mandibular
denture in the buccinator attachment zone,
retromylohyoid region, sublingual cresent area are
desirable
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26. Mandibular lingual flange
• Most desirable feature of lingual slopes approaches
900
to the occlusal plane.
• Effectively resist horizontal forces.
• Although the posterior fibres of the mylohyoid
muscle attach more superiorly than anterior, they
descend nearly vertically to attach hyoid bone
• So the posterior lingual flange can be extended
more inferiorly.www.indiandentalacademy.com
28. • Musculature of the floor of the mouth may also
influence the degree of intimate contact allowed.
• Any flange extension below the mylohyoid ridge
must incline medially away from the mandible to
allow for the mylohyoid muscle contraction.
• Presence of a thin mucosa overlying the bony
ridge slopes that may require relief make the close
contact impossible.
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29. Sublingual crescent area.
• The crescent shaped area on the anterior
floor of the mouth formed by the lingual wall
of the mandible and the adjacent sublingual
fold. It the area of the anterior alveolingual
sulcus.(GPT-8)
• Extension of the denture over the resting
tissues of the sublingual crescent area
completes the border seal.
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30. • Its coverage by denture results in
• 1)Increased stability by allowing the
tongue to aid in holding the denture in
place.
• 2) Increased retention of the denture.
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31. • Making the impressions with minimal
pressure on the floor of the mouth while
tongue is at rest position allows greater
mobility of the underlying muscles
without denture dislodgement and
without occlusion of the sublingual
gland duct.
•JPD1992;67:205-
210
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33. Relationship of the external
surface and periphery to
surrounding orofacial musculature
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34. • Both stability and retention depend upon the
relationship of polished surface and
surrounding orofacial musculature.
• Also normal functioning of certain muscle
groups enhance the stability.
• Alteration in external denture base contour
can lead to dynamic seating and stabilizing
action directed towards the prosthesis.
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35. • Action of certain muscle groups must be permitted to
occur without interference by the denture base so
that they will not dislodge the denture, - they
compromise the stability.
• The action of the levator anguli oris, depressor anguli
oris (triangularis), mentalis, mylohyoid and
genioglossus muscles can dislodge the denture if the
denture base does not provide freedom for these
muscle action.
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36. • The basic geometric
design of denture
bases should be
triangular.
• In the frontal cross
section, the maxillary
and mandibular
dentures should appear
as two triangles whose
apexes correspond to
the occlusal surface.
•JPD1983;49:165-174
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37. • The buccal and labial flanges of the maxillary and
mandibular dentures should be concave to permit
positive seating by the cheeks and the lips.
• The primary muscles of cheeks and lips are
orbicularis oris and buccinator.
• These muscles are active in mastication,
deglutition and speech.
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38. • The proper contour of the denture flanges
permits the horizontally directed forces,
that occur during contraction of these
muscles, to be transmitted as vertical
forces tending to seat prosthesis.
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40. • To direct a seating action on the mandibular
denture, the tongue should rest against a
lingual flange inclined medially away from
the mandible and somewhat concave. The
degree of inclination depends on the
balance of the muscular forces of the
tongue as opposed to the mylohyoid and
superior constrictor muscle.
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41. • Inclination of the lingual flange must be
designed to guide the tongue to rest
over the flange and permit any
horizontal forces generated against the
denture base to be transmitted as
seating forces.
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42. Modiolus
• The musculi cruculi modioli or modiolus
and their associated musculatures has
various actions on the denture.
• The modiolus or tendinous node is an
anatomical landmark near the corner of
the mouth that is formed by the
intersection of several muscles of the
cheeks and lips.
www.indiandentalacademy.com
45. • Because none of these muscles
contains fibres that have more than one
bony attachment, they depend on
fixation of the modiolus to allow
isometric contraction.
• E.g.-contraction of the triangularis,
caninus, and zygomaticus muscles
fixes the modiolus, allowing the
buccinator muscle to contract
isometrically.www.indiandentalacademy.com
46. • Isotonic contraction of the buccinator
muscle in the absence of modiolus
fixation would pull the corner of the
mouth posteriorly.
• The same is the situation of orbicularis
oris and other muscles.
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47. • The denture base must be contoured to
permit the modiolus to function freely.
• In the premolar region the mandibular
denture should exhibit both a shortened
and narrowed flange to permit the
action that draws the vestibule
superiorly and the modiolus medially
against the dentures.
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48. • The buccinator muscle may be divided in to
superior, middle, and inferior divisions.
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49. • According to Fish,
• Superior fibers acts to seat the maxillary
denture.
• Middle fibres controls the bolus of food.
• The inferior fibres contributes to
mandibular denture stability.
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50. • While the middle fibres contract,
controlling the bolus, the inferior fibres
relax to form a pouch capable of storing
food until needed to form another bolus.
• Extension of a concave denture base
into this pouch allows the cheek to lie
over the flange.
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51. Action of some other muscles.
Dislocating
muscles
Fixing
muscles
vestibular Masseter
Mentalis
Depressor labii
inferioris
Buccinator
Orbicularis oris
lingual Internal pterigoid
Palatoglossus
Styloglossus
mylohyoid
Genioglossus
Intrinsic
muscles of
tongue
JPD1965;15:401-417
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52. • Masseter muscle- if an impression is
made while masseter is relaxed, the
denture tends to be displaced when this
muscle contracts.
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53. • Mentalis muscle:- the
origin of the mentalis
muscle is located closer
to the crest of the
residual ridge than the
mucosal reflection in
the alveolabial sulcus.
• Consequently the
bottom of the sulcus is
lifted when the mentalis
muscle contracts; and
thereby, the depth and
space of the oral
vestibule can be
decreased
considerably.
www.indiandentalacademy.com
54. • Depressor labii inferioris originates from
very near the crest of the residual ridge
and extends down and beneath the
alveololabial sulcus.
• So during contraction, the denture
space reduces .
www.indiandentalacademy.com
55. • Internal pterygoid muscle- it determines the
extension of the denture in the lower,
posterior and lingual part.
• Palatoglossus muscle during deglutition, it
reduces the lumen of the isthmus faucium.
The mucosa covering the lower part of the
muscle is lifted superiorly, anteriorly and
medially. The terminating part of
alveololingual sulcus is affected by it’s
contraction
• Styloglossus
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56. • Pterygomandibular raphe:- when mouth
is opened widely, the
pterygomandibular raphe stretches. So
a denture that has been extended onto
this structure may be dislodged during
an energetic opening movement of the
mandible.
www.indiandentalacademy.com
57. • Tendon of the genioglossus muscle:-
when the apex of the tongue is lifted,
the tendaneous origin of the
genioglossus muscle as well as the
lingual frenum will be passively
streched and lifted, thus easily being
capable of dislodging the lower denture
www.indiandentalacademy.com
58. Tongue
• As the patient becomes edentulous, the
continuous destruction of residual ridges
occurs.
• Because of these changes the tongue will
expand in the space formerly occupied by the
teeth.
• This occurs partly due to a growth of tongue
and has been named Proptosis lingualis.
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59. • A small, narrow tongue contributes to
the ease of impression making but
jeopardizes the lingual seal for
mandibular denture.
• An extremely large tongue
(macroglossia) poses additional
problems during impression making and
impairs denture stability.
www.indiandentalacademy.com
60. Normal tongue.
• A normal tongue fills the floor of the
mouth.
• The apex rests on the lingual surface of
the mandibular anterior teeth and the
sides rest against the lingual surfaces
of the posterior teeth and extend slightly
over their occlusal surfaces.
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62. • When mouth is opened, the tongue can
rest on the mandibular teeth and
stabilizes a mandibular denture.
• During mastication, the sides of the
tongue press food outward over the
posterior teeth in opposition to inward
pressure of the middle fibres of the
buccinator muscle.
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64. The retracted tongue position is sometimes
referred to as an awkward tongue position,
and has the following characteristics:
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66. (1) The tongue is pulled back into mouth and the
floor of the mouth is exposed.
(2) The lateral borders are either inside or posterior
to the ridge.
(3) The tip of the apex of the tongue sometimes lies
in the posterior part of the floor of the mouth or
may be withdrawn into the body of the tongue.
www.indiandentalacademy.com
67. The neutral zoneThe neutral zone
• Definition: (GPT-8)
• The potential space between the lips
and cheeks on one side and tongue on
the other; that area or position where
the forces between the tongue and
cheeks or lips are equal.
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68. • The basic concept is to establish
harmony between the polished surface
of denture and the associated
musculature.
• The musculature should functionally
mold not only the borders but also the
entire polished surface.
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69. • The teeth are placed within the “neutral
zone” where facial and lingual forces
generated by the musculature of the
lips, tongue and cheeks are balanced.
• This functional rather than anatomic
arrangement of teeth is believed to
further enhance the stability of the
dentures by minimizing active forces.
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72. • Harmony developed between the
opposing occlusal surfaces also
contributes stability.
• The dentures must be free of
interferences within the functional range
of movements of the patient.
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73. • During both functional and
parafunctional movements movements
the occlusal surfaces should not strike
prematurely in localized areas.
• Such contacts cause uneven stresses
to be transmitted to the denture during
function resulting in lateral and torquing
forces that destabilize the denture.
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74. • Geometric classification of occlusion.
[J.P.Frush –1966]
1) One-dimensional (linear) occlusion.
2) Two-dimensional (flat plane) occlusion.
3) Three-dimensional (cusped) occlusion
This is based on the dimensional contacts
between occluding posterior teeth.
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75. Anatomic occlusal scheme.
• Maximum
intercuspation.
• Surface contact
between posterior
anatomic teeth
consists of
multidirectional but
equalized, vectors.
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76. • The directional
forces change in
eccentric position,
and there is a
significant lateral
force component
exerted on the
denture bases.
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77. Balanced occlusion
• The bilateral, simultaneous, anterior
and posterior occlusal contact of teeth
in centric and eccentric positions.
(GPT-8)
• The bilateral balance is more important
during activities such as swallowing
saliva, closing to reseat the dentures,
and the bruxing of the teeth.
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78. • Patients with balanced occlusion do not
upset the normal static, stable and
retentive position.
• Absence of occlusal balance will result
in leverage of the denture during
mandibular movement, compromising
stability.
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79. Zero degree teeth.
• They can be arranged in a single plane
(monoplane/ flat plane).
• If they are set in a curve, balancing can be
achieved. But this results in additional planes.
• These inclined planes can cause skidding of
the denture bases and induce excessive
friction.
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80. • A monoplane
scheme reduces the
horizontal force
components
because of direction
of forces between
zero degree teeth in
centric and eccentric
position is
essentially vertical.
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81. • However in eccentric positions there is an
inequity in the opposing surface area contact
between working and non-working side and
there is a shift in the location of the forces
between the occluding surfaces.
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82. Linear occlusion.
• William H. Goddard.
• The basic parameters.
1)Zero degree (flat plane) teeth are
opposed by bladed (line contact) teeth
in which the blade is in a precisely
straight line over the crest of ridge.
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84. 2) Maxillary teeth are set to a flat
(monoplane) occlusal plane.
3) There is no anterior tooth interference
to protrusive or lateral movement.
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86. • The size of the requiring the greatest
stability may determine the arch
receiving the bladed teeth.
• The occluding forces between a zero
degree and a bladed tooth are vertical
in centric and eccentric positions.
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87. • Force of vectors are vertical and equalized in
both centric and eccentric positions.
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88. • The blade line contact with the zero degree
(flat plane) reduces the width component of
the force seen in other zero degree denture
occlusion and increases the force per unit
area of contact.
• Noninterceptive occlusion provides a
consistent vertical seating force in both
centric and eccentric movement; transverse
force vectors are essentially eliminated.
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89. ESTHETICS?
• If non-anatomic or linear occlusal
scheme is followed, esthetics gets
compromised, especially in the
maxillary premolar region.
• Occlusal scheme with advantages of a
linear occlusal scheme yet providing
good esthetics……….
Gysi (1927); Payne (1941)
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91. LINGUALIZED OCCLUSION.
• Principles of lingualized occlusion.
• Anatomic posterior (30/330
) teeth are used for
the maxillary denture. Tooth form with
prominent lingual cusps are helpful.
• Nonanatomic or semianatomic teeth are used
for the mandibular denture. Either a shallow
or flat cusp form is used. A narrow occlusal
form is preferred.
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92. • Modification of the mandibular posterior teeth
by selective grinding of central fossae of the
mandibular teeth, lower marginal ridges and
to form slight buccal and lingual inclines.
• Maxillary lingual cusps should contact
mandibular teeth BUT the mandibular
buccal cusps should not contact the upper
teeth in centric occlusion.
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94. • Balancing and working contacts should
occur only on the maxillary lingual
cusps.
• Protrusive balancing contacts should
occur only between the maxillary lingual
cusps and the lower teeth.
• Since in lingualized occlusion, vertical
forces are centralized on the
mandibular teeth, it is proposed to aid in
stability.
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95. Tooth position and occlusal
plane.
• Anterior and posterior teeth should be
arranged as close as possible to the
position once occupied by the natural
teeth, with only slight modifications
made to improve leverages and
esthetics.
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96. • When forces act on a body in such a
way that no motion results, there is a
balance or equilibrium.
• This should be the primary
consideration with the forces that act on
the teeth and the denture bases with
their resultant effect on the movement
of the base.
• A stable base is the ultimate goal.
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97. • Total stability is not possible because of
the yielding nature of the supporting
structures.
• ‘Lever balance’ is the basis of balanced
occlusion.
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98. Some rules in teeth arrangement.
• The wider and larger the ridge and
closer the teeth are to the ridge, greater
is the lever balance.
• Wider the ridge, narrower teeth bucco-
lingually greater the balance and vice-
versa.
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99. • More lingual the teeth placed in relation
to the ridge crest, greater the balance,
more buccal the placement of teeth,
poorer the balance.
• More centered the forces of occlusion
antero-posteriorly greater the stability of
the base.
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100. Maxillary anterior tooth
position:
• The arch curvature should correspond
to curvature of alveolar ridge, facial
contour and maxillary lip position.
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101. • Arranging teeth in to
a square arch form
on a tapering or
ovoid residual
alveolar ridge
causes canines to
be labial to crest of
the maxillary ridge
than central incisors.
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102. • This results in bicuspids being more buccal to
the ridge than they should be.
• Working side occlusal pressure produces a
displacing tendency, the ridge crest acting as
a fulcrum.
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103. • The labial axial inclination of the natural
anterior tooth places the incisal edge labial to
the center of rotation of the tooth, if prosthetic
tooth is placed exactly in the same position
as the natural crown it will be labial to the
ridge support.
• Incisal pressure causes a displacing torque.
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104. Mandibular anterior tooth position.
• It should be in harmony with the
maxillary anterior tooth position.
• Errors in maxillary tooth position will be
transferred to the mandibular arch.
• For maximum stability, overbite should
be as minimum as possible.
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105. Maxillary posterior tooth position.
• Natural posterior maxillary teeth have a
buccal axial inclination and the mandibular
teeth have a normal lingual axial
inclination.
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107. • The normal residual alveolar ridge resorption
pattern leads to increased cross bite
relationship.
• Tendency to avoid crossbite arrangement
results in placing maxillary teeth in buccal
position or mandibular teeth in lingual to
desired position.
• Both leads to impaired stability.
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108. • In such cases, the working side
occlusal pressure causes a displacing
tendency because the line of force is
buccal to the fulcrum.
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109. Mandibular posterior teeth.
• The buccal cusps and fossae of the
posterior mandibular teeth should be
directly over the crest of the ridge.
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110. •If placed more buccally, working side occlusal
pressure causes a displacing tendency because
the line of force is buccal to the fulcrum.
•If placed more lingually, tongue will displace the
denture
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111. OCCLUSAL PLANE
• The superior-inferior position of the
occlusal plane also a recognized factor
influencing stability.
• A mandibular occlusal plane that is too
high can result in reduced stability.
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112. 1]Lateral tilting forces directed against the teeth
are magnified as the plane is raised.
2]The mandibular denture needs to be
controlled by the musculature of the tongue,
lips, and cheeks.
An elevated occlusal table prevents the tongue
from reaching over the food table into the
buccal vestibule.
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113. • A raised mandibular occlusal plane is
usually present when the vertical
dimension of occlusion is increased
excessively.
• Bisecting the interridge distance
distance improves the mechanical
advantage of the mandibular denture.
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114. • The best stability is obtained when the
occlusal plane is parallel to and evenly
divided between the ridges.
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115. • If the occlusal plane is is tipped, there will be
shunting effect and a loss of stability.
• If the occlusal plane is lower in molar area,
there will be a tendency for upper denture to
be displaced posteriorly and lower denture
anteriorly.
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116. Patient education
Eating
• Patients must be advised that chewing is not
random but an intentional and selective activity.
The eating skills must be slowly developed and
refined. Initially patient should limit themselves to
soft foods and avoid tough fibrous foods that will
overtax the capacity of their residual ridges.
•
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117. • What to eat depends on effective patient
guidance .
• How to eat with dentures is a skill that has to
be learned
• Basically chewing with dentures is more
methodical than with natural teeth. Patients
must be instructed to divide the normal
spoonful of food into half and place each half
posteriorly and bilaterally
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119. • In order to determine whether the patient has
normal tongue position or an abnormal retracted
tongue position, ask the patient to open just
wide enough to accept food and observe the
dorsal surface of tongue and occlusal surfaces
of the teeth.
• The tongue is in contact with lingual surface
of denture and floor of mouth is at normal level.
The mandibular denture should be stable and
able to resist a gentle push on mandibular
incisors. If not, the denture will be unstable and
easily dislodged.
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120. • Thus the patient should be aware of importance
of tongue position, demonstrate proper tongue
positions and subsequent increase in denture
retention and stability.
• The patient must practice opening and closing
while tongue assumes normal position.
• Some patients with Parkinson’s disease
stroke will have difficultly in coordinating tongue
movements. These patients have difficultly in
speaking and require help of speech therapist.
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121. Checking stability of the patient
• Pressure is applied with the ball of the
finger in the premolar-molar regions of
each side alternatively.this pressure
must be at right angle to the occlusal
surface. If pressure on one side causes
the denture to tilt and raise on the other
side, it indicates that the teeth on the
side on which the pressure was applied
are outside the ridge.
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122. • Checking stability in centric closure- patient is
asked to close in centric relation, if forceful
closure causes skidding of the denture,
dentures are said to be unstable.
• If balanced occlusion is provided to the
patient,patient is asked to do all the eccentric
movements, the denture should remain firm
and steady.
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123. • Stability can be evaluated by grasping
the denture and attempting to rotate it
or displace it laterally. The amount of
movement must be considered relative
to shape and character of the
supporting structures (e.g. resiliency of
the underlying tissue).
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124. Maximizing stability.
• Maximum coverage of denture bearing
area within physiologic limit.
• Giving due respect to muscle actions.
• Use of neutral zone impression
technique.
• Proper positioning of teeth.
• Proper positioning of occlusal plane.
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125. • Occlusal scheme selection best suited
for individual patient.
• Non interceptive occlusion.
• Proper patient education regarding
tongue position, diet habit etc.
• Denture modifications.
• Use of denture adhesives.
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126. Improving patient’s denture foundation
and ridge relations.
Non surgical methods- providing rest for
denture supporting tissues, good
nutrition and conditioning of patient’s
musculature.
Surgical methods- they are more
popularly known as pre-prosthetic
surgeries.
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127. • Surgeries for ridge correction-
Frenectomies, excision of hyperplastic
tissues,correction of bone deformities.
• Surgeries for ridge extension:-
Vestibuloplasty, ridge augmentation
procedures.
• Placement of tooth root analogues.
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128. Overdentures
• Dentures get more ridge support, this
enhances the retention of the denture and
ultimately stability gets improved.
• Rate of resorption of residual ridge
decreases.
• Preservation of periodontal membrane-
preservation of proprioceptive impulses-
retains myofacial nervous complex- improved
neuromuscular control – improved
manipulation of denture in mouth.
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129. • Improving borders and peripheral
extensions by using soft relining
materials.
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130. • Using composite impression technique
for recording flabby ridges.
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131. Myloc system
The surface of a lower denture facing the
tongue is fitted with small bars shaped like
wings. These wings lay underneath the
tongue providing a purchase point to help
stabilize the denture.
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132. MYLOFLEX DENTURESMYLOFLEX DENTURES
• . It incorporates a positional memory
insert and an extended flange that takes
advantage of the undercut available in the
submandibular fossa.
• When placed in the mouth, the myloflex
denture captures the lower mandible with
it's bilateral spring action. The tension is
slight, but significant enough to aid in
stabilization and retention of the denture
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135. Influence of functional design on the
stability of complete maxillary dentures.
F.Floystrand , J.Orstavik
Journal of dental research 1982 vol.61
Reprinted abstract – JPD 1983;49(1):4
A clinical study - stability of complete maxillary
denture was measured as resistance against
dislodgment provoked by unilateral occlusal
loading of denture in premolar region
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136. • The results confirmed the beliefs that
lingualized occlusal contact, functionally
determined filling in of the vestibulum by
the denture borders and full palatal
coverage to the vibrating line all
contribute toward improved stability of
complete dentures.
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137. The maxillary denture: its palatal
relief and posterior palatal seal.
Laney WR,Gonzalez JB
JADA 1967;75:1182-1187.
V- shaped maxillary ridge with essentially
no hard palate; not conducive to
development of good complete denture
stability and retention.
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138. • U-shaped maxillary ridge with horizontal
hard palate; favorable for support and
retention.
• Palates with torus complicate retention
and stability as they are covered by thin
mucoperiosteum.
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139. • The influence of the retromylohyoid extension on
mandibular complete denture stability.
C.H.Jooste, C.J. Thomas
IJP1992;5:34-38
The contribution of retromylohyoid extension in
complete mandibular impression was tested in six
individuals by means of cineradiography and
placement of metal marker.
It was concluded that the retromylohyoid extension
has a stabilizing effect on mandibular complete
denture.
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140. Prospective clinical evaluation of
mandubular implant overdentures part-I
retension stability and tissue responses,
DR Burns et al
JPD1995;73
• The study shown superior statistics of
implants as an treatment alternatative to
increase stability than ridge augmentation or
vestibular extension procedures.
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141. A comparison of different treatment
strategies in patients eith atrophic
mandibles- a clinical evaluation.
W. Kalk et al. IJP 1992;5.
• In this 6.5 years clinical follow up study, the
stability was assessed in three groups:
1)those patients who needed pre-prosthetic
surgery but which was contraindicated , had
received new dentures.
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142. 2) same as group 1 but were treated with
vestibuloplasty and lowering of the floor of
the mouth before denture fabrication.
3)Control groups without residual ridge
problems who were treated with new
complete dentures
• The least displacement of the mandibular
denture occurred in group2 and group3,
with group 1 being the greatest.
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143. CONCLUSION.
• Stability prevents anterioposterior shunting of
the denture base .
• It has been cited as the most significant
property in providing physiology comfort to
the patient.
• Denture instability adversely affect retention
& support & results in deleterious forces on
the edentulous ridge during function &
parafunction.
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144. • It is important to know factors affecting
stability.
• Though to fabricate the perfectly stable
denture may not be truly possible , we
should still try to achieve the maximum
possible.
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145. REFERANCES.
• Boucher’s Prosthodontic treatment for
edentulous patients.
• Sheldon Winkler: Essentials of
complete denture prosthodontics.
• John J. Sharry: complete denture
prosthodontics.
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146. • David J. Lamb: problem and solutionas in
complete denture prosthodontics.
• William R. laney: Diagnosis and treatment in
prosthodontics.
• Evaluation of the factors necessary to
develop stability in complete dentures.
Corwin R. Wright
JPD 1966;16:414-30. reprint
JPD2004;92:509-18
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147. • A contemporary review of the factors involved
in complete dentures part II: stability
T.E.Jacobson JPD1983;49:165-172.
• The dynamic nature of the lower denture
space. N. brill , Dr.Odont. JPDmay-june
1965;15:401-417
• The influence of the retro mylohyoid
extension on mandibular complete denture
stability. C.H.Jooste IJP 1992;5:34-38.
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148. • The sublingual cresent extension and its
relation to the stability and retention of
mandibular complete dentures M K A Azzam
JPD 1992;67:205-210.
• Maximizing mandibular prosthesis stability
utilizing linear occlusion, occlusal plane
selection and centric recording. Richadr A.
Williamson. J. Prosthodont 2004 ;13:55-61.
• Lingualized occlusion for removable
prosthodontics. Curtis M. Becker et al.
JPD1977;38:601-607.
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149. • Lineal occlusal concept for complete
dentures. Donald G.Gronas
JPD1974;32:122-129
• Tooth position in relation to the denture base
foundation. Lawrence A Weinberg
JPD 1958;8:398-405.
• Complete denture occlusion Brien R. Lang
DCNA 2004;48:641-665
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Latin word –hub of a wheel
Meating pt. Of eight muscles-distinct conical prominance at the corner of the mouth.
If the thumb is placed inside the corner of the mouth and the fingre outside on the prominance and then the lip and cheek are contracted, the modiolus feel like a a knot
It can be fixed more anteriorly as when the word “Hoe” is pronounced or posteriorly as in case of “He”.
This pouch is called Anthropoidal pouch Coz its more prominent in monkeys they use it to store food
1)coz the tissues covering the massetor be displaced anteriorly.
Although everyone has a normal tongue at birth, some looses it and as a result acquire retracted tongue position
The functional renge refers to the positions through which the lower jaw moves horizontally during normal speech, swollowing and mastication.
The frictional resistance between the wide occlusal table of the zero degree teeth may contribute horizontal forces to the denture bases. Thus both the anatomic and flat plane bith tyoes if teeth leads to in stabilty of lower denture.
In the eccentric positions also the forces will act in same position over the residual ridge as that of centric position.
Is it possible?
But this position is essential for esthetics and function, so balanced occlusion is necessary.
This leads to slight crossbie relation when teeth are extracted, which may goes un detected.
But since the maxillry dentures are more retentivr which in turns aid in stability, we tends to abuse it thiss results in rapid latral resorption of alveolar ridge.
This compramises stability and makes control of the food bolus and denture more difficult.
Various anatomical landmarks such as Stensons duct and retromalar pad should be taken in to consideration while planning for occlusal plane
They can be soft tissue and hard tissue sugeries ------ bony deformities- exostisis tori , and genial tubercle
Dramitic change in stability of denture can be obsereved bu long term clinical follow up studies are not reported.
In one clinical study it is reported to be 8 times less than conventional dentures