Maxillary major connectors are an important component of removable partial dentures that join the denture bases on each side of the dental arch. There are several types of maxillary major connectors including single palatal straps, combination anterior and posterior palatal straps, palatal plates, U-shaped connectors, single palatal bars, and anterior-posterior palatal bars. The ideal major connector is rigid, protects soft tissues, provides indirect retention, promotes patient comfort, and is self-cleansing. Proper design of the major connector involves outlining the denture base areas, non-bearing tissues, and connector areas on the diagnostic cast.
This document provides definitions and classifications of direct retainers used in removable partial dentures. It discusses the basic parts of a clasp assembly including the rest, body, shoulder, retentive arm, and terminal. It covers principles of clasp design including retention, support, stability, encirclement and passivity. Factors affecting retention such as clasp type, flexibility, length, diameter, taper, curvature and material are explained. The location of the retentive terminal in the undercut is also an important factor for retention.
This document discusses principles of removable partial denture design. It covers different types of partial denture support, including tooth-supported and tooth/tissue-supported designs. Key factors in partial denture design include distributing forces, controlling movement, selecting appropriate components, and considering the individual patient's anatomy and needs. Design elements like survey lines, clasps, connectors, and occlusal rests are discussed in terms of their effects on support and stress distribution. The document contrasts the biomechanical considerations between total tooth-supported versus distal extension partial dentures.
Rests are rigid extensions of a partial denture that are placed in specially prepared rest seats on teeth. They provide support to the partial denture. There are three main types of rests: occlusal, incisal, and lingual. Occlusal rests contact the chewing surface and are the most common type. Incisal rests are placed on the front surface of teeth. Lingual rests are on the inside surface of teeth. Rests must be properly fitted, strong, not raise the bite, transmit forces down the long axis of the tooth, and secure the clasp in the right position. Well-made rest seats help control stresses on teeth.
A RPD derives support from two main sources periodontally sound natural teeth & residual alveolar processes and associated soft tissues.
A RPD that is supported by healthy natural teeth possesses adequate stability and retention to resist functional displacement.
However, a RPD that is not entirely bounded by natural teeth will move when a load is applied.
Designing for kennedy class i and class iiDrLeenaTomer
This document discusses principles and considerations for designing removable partial dentures for Class I and Class II cases. It covers the history of RPD design, philosophies like stress equalization and physiologic basing, biomechanical factors, and essential design elements. Key points discussed include using minimum direct retention from clasps, distributing forces through indirect retention and broad bases, and controlling stresses on abutment teeth through clasp position, design, and splinting of abutments.
MAJOR CONNECTORS AND MINOR CONNECTORS IN RPD - Dr Prathibha PrasadDr Prathibha Prasad
The document discusses different types of major and minor connectors used in removable partial dentures. Major connectors discussed include palatal bar, strap, U-shaped, and plate connectors for maxillary arches and lingual bar, linguoplate, sublingual bar, and double lingual bar connectors for mandibular arches. Key factors in choosing a major connector are the number of teeth being replaced, available space, and need for rigidity or support. Minor connectors help stabilize and retain components on one side of the dental arch to the other.
The patient who requires a single denture opposing a natural or restored dentition challenges the clinician even more than the completely edentulous patient does. This is due to the biomechanical differences in the supporting tissues of the opposing arches. So a proper evaluation, correction of the existing factors and proper sequence of denture construction is necessary to give a more stable prosthesis.
This document discusses maxillary major connectors for removable partial dentures. It defines a major connector as the unit that connects parts of the prosthesis on both sides of the arch. The chief functions are unification, force distribution, and minimizing torque to teeth. Common materials used are gold alloys, nickel-chromium, cobalt-chromium, and titanium alloys. Types of maxillary major connectors include palatal strap, palatal bar, U-shaped, anterior/posterior bars or straps, and palatal plate. Design considerations aim to avoid impingement of tissues and provide adequate support and rigidity. Non-rigid connectors allow independent movement but can increase ridge resorption. Studies have examined the rigidity of different
This document provides definitions and classifications of direct retainers used in removable partial dentures. It discusses the basic parts of a clasp assembly including the rest, body, shoulder, retentive arm, and terminal. It covers principles of clasp design including retention, support, stability, encirclement and passivity. Factors affecting retention such as clasp type, flexibility, length, diameter, taper, curvature and material are explained. The location of the retentive terminal in the undercut is also an important factor for retention.
This document discusses principles of removable partial denture design. It covers different types of partial denture support, including tooth-supported and tooth/tissue-supported designs. Key factors in partial denture design include distributing forces, controlling movement, selecting appropriate components, and considering the individual patient's anatomy and needs. Design elements like survey lines, clasps, connectors, and occlusal rests are discussed in terms of their effects on support and stress distribution. The document contrasts the biomechanical considerations between total tooth-supported versus distal extension partial dentures.
Rests are rigid extensions of a partial denture that are placed in specially prepared rest seats on teeth. They provide support to the partial denture. There are three main types of rests: occlusal, incisal, and lingual. Occlusal rests contact the chewing surface and are the most common type. Incisal rests are placed on the front surface of teeth. Lingual rests are on the inside surface of teeth. Rests must be properly fitted, strong, not raise the bite, transmit forces down the long axis of the tooth, and secure the clasp in the right position. Well-made rest seats help control stresses on teeth.
A RPD derives support from two main sources periodontally sound natural teeth & residual alveolar processes and associated soft tissues.
A RPD that is supported by healthy natural teeth possesses adequate stability and retention to resist functional displacement.
However, a RPD that is not entirely bounded by natural teeth will move when a load is applied.
Designing for kennedy class i and class iiDrLeenaTomer
This document discusses principles and considerations for designing removable partial dentures for Class I and Class II cases. It covers the history of RPD design, philosophies like stress equalization and physiologic basing, biomechanical factors, and essential design elements. Key points discussed include using minimum direct retention from clasps, distributing forces through indirect retention and broad bases, and controlling stresses on abutment teeth through clasp position, design, and splinting of abutments.
MAJOR CONNECTORS AND MINOR CONNECTORS IN RPD - Dr Prathibha PrasadDr Prathibha Prasad
The document discusses different types of major and minor connectors used in removable partial dentures. Major connectors discussed include palatal bar, strap, U-shaped, and plate connectors for maxillary arches and lingual bar, linguoplate, sublingual bar, and double lingual bar connectors for mandibular arches. Key factors in choosing a major connector are the number of teeth being replaced, available space, and need for rigidity or support. Minor connectors help stabilize and retain components on one side of the dental arch to the other.
The patient who requires a single denture opposing a natural or restored dentition challenges the clinician even more than the completely edentulous patient does. This is due to the biomechanical differences in the supporting tissues of the opposing arches. So a proper evaluation, correction of the existing factors and proper sequence of denture construction is necessary to give a more stable prosthesis.
This document discusses maxillary major connectors for removable partial dentures. It defines a major connector as the unit that connects parts of the prosthesis on both sides of the arch. The chief functions are unification, force distribution, and minimizing torque to teeth. Common materials used are gold alloys, nickel-chromium, cobalt-chromium, and titanium alloys. Types of maxillary major connectors include palatal strap, palatal bar, U-shaped, anterior/posterior bars or straps, and palatal plate. Design considerations aim to avoid impingement of tissues and provide adequate support and rigidity. Non-rigid connectors allow independent movement but can increase ridge resorption. Studies have examined the rigidity of different
Other forms of removable partial denture Amal Kaddah
This document discusses various types of removable partial dentures (RPDs), including unilateral RPDs, swing-lock RPDs, overlay partial dentures, implant-supported RPDs, and attachments for RPDs. It provides details on the design, indications, advantages and disadvantages of each type. Key types discussed include overlay partial dentures, which are constructed over remaining natural teeth for additional support and retention, and attachments for RPDs, which can improve retention and are either precision attachments that are prefabricated, or semi-precision attachments that are fabricated in the dental laboratory.
This document presents classification systems for complete edentulism, partial edentulism, and completely dentate patients. For complete edentulism, it describes 4 classes based on factors like residual bone height, ridge morphology, muscle attachments, and occlusal relationships. Partial edentulism classes are determined by location/extent of edentulous areas, abutment conditions, occlusion, and residual ridges. Completely dentate classes consider tooth condition and occlusal scheme, with higher classes requiring more extensive pre-prosthetic therapy.
This document discusses clinical and laboratory remounting in complete dentures. It begins by introducing complete dentures and the importance of proper occlusion. Errors can occur during the fabrication process that affect occlusion. Remounting procedures, including laboratory and clinical remounting, are recommended to identify and correct occlusal errors. Laboratory remounting involves using a split-cast mounting technique to remount the dentures on an articulator after processing. Clinical remounting takes new interocclusal records in the patient's mouth and mounts the dentures on an articulator to correct errors made during the initial records. Selective grinding is then used to refine the occlusion based on the remount records.
Major and minor connectors are important component parts of partial dentures. Major connectors join the components on opposite sides of the dental arch and must provide rigidity while avoiding pressure on soft tissues. Minor connectors join the major connector to other parts like clasps, rests, and the denture base. Both major and minor connectors work together to distribute forces and provide retention, stability, and support for the partial denture.
1) Surveying involves marking the height of contour and infrabulge on teeth to determine the path of insertion and areas for retention. Guide planes are then prepared parallel to this path to restrict movement.
2) Analysis determines if the initial survey line provides sufficient retention and whether tilting the cast is needed.
3) The final survey line is marked, selecting retentive undercuts opposing the path of displacement. Guide planes are prepared to further limit movement to a single path.
The document discusses various aspects of clasp design for removable partial dentures. It begins by defining what a clasp is and describing different clasp classifications such as occlusally approaching and gingivally approaching clasps. It then examines specific clasp designs like circumferential, bar/Roach type, and combination clasps. The document outlines the functional requirements of clasps, including retention, support, stability, and reciprocation. It also reviews several statements about clasp design, discussing whether prosthodontic experts agree or disagree with them based on clinical factors.
Prosthodontics seminar 3rd stage University of Anbar College Of Dentistry
Created By Mohammed Amer Hekma
Supervised by: Dr Osama Abdul Rasool Hammoodi
References
• FUNDAMENTALS OF REMOVABLE PARTIAL PROSTHODONTIC DESIGN by Kenneth R. McHenry, D.D.S., M.S and Terrence McLean, D.D.S.
• Stewart's Clinical Removable Partial Prosthodontics, Fourth Edition by Rodney D Phoenix, D.D.S, M.S, David R Cagna, D.M.D, M.S and Charles F DeFreest, D.D.S
• McCRACKEN’S REMOVABLE PARTIAL PROSTHODONTICS, TWELFTH EDITION BY Alan B. Carr, D.M.D, M.S, and David T. Brown, DDS, MS
An impression is required to fabricate a fixed dental prosthesis. It must include the prepared teeth as well as surrounding structures. Various impression materials and techniques have been developed over time. Today, alginate, polyether, addition silicone and polyvinyl siloxane are commonly used. Proper tray selection and customization is important to obtain an accurate impression. Impression making requires isolation, tissue retraction and meticulous technique to ensure detail and avoid imperfections.
This document discusses resin bonded fixed partial dentures (RBFPDs). It defines RBFPDs as prostheses that are luted to tooth structure using composite resin. Various types are described, including cantilever, fixed-fixed, and hybrid bridges. Advantages include reduced cost and minimal tooth preparation. Indications are for replacing single missing teeth with caries-free abutments. A case example describes using an RBFPD to replace a missing mandibular incisor and splint mobile abutment teeth.
This document discusses post-insertion complaints with complete dentures. It begins by classifying common and uncommon complaints, such as sore spots, loose fit, speech issues, and more. It then discusses the management of these complaints, including examining denture faults, occlusal discrepancies, retention issues, and other potential causes. The document provides an overview of evaluating and addressing patients' post-insertion complaints to improve the function and comfort of their complete dentures.
This seminar is of postgraduate level, which will be helpful for students. The presenter has added the information from various sources and the references are quoted in the last few slides of the seminar to gather more information about the seminar.
Post insertion problems in complete dentures Rohan Bhoil
Post insertion problems in complete dentures can arise from inaccuracies during the denture construction process. Common complaints include loose dentures, discomfort, poor appearance, and speech problems. Loose dentures may be caused by decreased retention forces or increased displacing forces, and can be addressed by relining or remaking the dentures to improve the fit. Discomfort issues like pain can stem from occlusal errors or poor border extensions, and may be resolved through adjustments like selective grinding. Appearance complaints regarding tooth visibility or lip creasing could require remaking the dentures to correct.
This document discusses the design of removable partial dentures (RPDs). It defines the differences between Class I/II and Class III RPDs, and describes the design sequence including placing rests, major connectors, minor connectors, and direct and indirect retainers. Color codes for design elements are also explained. The objective of RPD design is to control denture movement while preserving oral tissues. Proper design follows diagnostic information and mechanical principles.
Principles of tooth preparation in Fixed Partial DenturesVinay Kadavakolanu
The document discusses principles of tooth preparation for dental restorations. It summarizes that the all-ceramic crown preparation design requires the highest percentage of tooth structure reduction at 65.26%, while ceramic veneers require the lowest at 30.28%. Proper tooth preparation aims to preserve tooth structure, provide retention and resistance, maintain structural durability and marginal integrity, and preserve the periodontium. The amount and location of tooth reduction impacts these factors.
The document summarizes laboratory procedures for fabricating a metal partial denture framework. It discusses preparing the master cast, duplicating the cast, wax pattern and spruing, investing and burnout, casting the framework, and finishing. Key steps include:
1) Preparing the master cast by beading the major connector, spraying with sealant, blocking out undercuts, and providing relief.
2) Duplicating the master cast using reversible hydrocolloid in a flask.
3) Creating the wax pattern by adapting pre-made plastic patterns to the refractory cast and joining them with wax, then spruing the pattern.
4) Investing involves using gypsum, phosphate, or sil
secondary impression / final impression in complete denture.
#prosthodontics
#prostho
BDS 4th year
Nischala Chaulagain
Nobel Medical College , Biratnagar
The document discusses the try-in process for complete denture patients. It defines try-in and trial dentures as preliminary fittings used to evaluate aesthetics, fit, and jaw relationships. The try-in involves extraoral and intraoral examinations to check the denture bases, teeth arrangement, occlusion, retention, stability, and other factors. Adjustments are made to optimize aesthetics, function, and patient comfort before the final dentures are fabricated.
The document discusses the benefits of meditation for reducing stress and anxiety. Regular meditation practice can help calm the mind and body by lowering heart rate and blood pressure. Studies have shown that meditating for just 10-20 minutes per day can have significant positive impacts on both mental and physical health over time.
Temporary removable partial dentures are used for a limited period of time until a more definitive prosthesis can be provided. They serve several objectives like reestablishing esthetics, maintaining space, improving patient tolerance, and conditioning tissues. Some common types of temporary RPDs include interim, transitional, treatment, and immediate RPDs. Acrylic partial dentures are lightweight alternatives to metal partial dentures that are less expensive and easier to construct but also weaker and less hygienic. Their design incorporates acrylic resin, acrylic teeth, and wire clasps.
Major connector removable partial dentureNITIKBAISOYA
The major connectors connect the parts of a partial denture on one side of the arch to the other. They must be rigid to avoid bone and tissue damage. For a maxillary connector, the borders should be at least 6mm from the gingiva and cross the palate at a right angle. Common types of maxillary connectors include the single posterior palatal bar, palatal strap, and anterior-posterior palatal bar. The lingual bar is generally the preferred mandibular connector if space allows, requiring at least 8mm from the gingiva to the floor of the mouth. Relief is needed between mandibular connectors and tissues.
A major connector joins the components on one side of the arch with those on the opposite side. Therefore, all components are attached to the associated major connector either directly or indirectly.
Other forms of removable partial denture Amal Kaddah
This document discusses various types of removable partial dentures (RPDs), including unilateral RPDs, swing-lock RPDs, overlay partial dentures, implant-supported RPDs, and attachments for RPDs. It provides details on the design, indications, advantages and disadvantages of each type. Key types discussed include overlay partial dentures, which are constructed over remaining natural teeth for additional support and retention, and attachments for RPDs, which can improve retention and are either precision attachments that are prefabricated, or semi-precision attachments that are fabricated in the dental laboratory.
This document presents classification systems for complete edentulism, partial edentulism, and completely dentate patients. For complete edentulism, it describes 4 classes based on factors like residual bone height, ridge morphology, muscle attachments, and occlusal relationships. Partial edentulism classes are determined by location/extent of edentulous areas, abutment conditions, occlusion, and residual ridges. Completely dentate classes consider tooth condition and occlusal scheme, with higher classes requiring more extensive pre-prosthetic therapy.
This document discusses clinical and laboratory remounting in complete dentures. It begins by introducing complete dentures and the importance of proper occlusion. Errors can occur during the fabrication process that affect occlusion. Remounting procedures, including laboratory and clinical remounting, are recommended to identify and correct occlusal errors. Laboratory remounting involves using a split-cast mounting technique to remount the dentures on an articulator after processing. Clinical remounting takes new interocclusal records in the patient's mouth and mounts the dentures on an articulator to correct errors made during the initial records. Selective grinding is then used to refine the occlusion based on the remount records.
Major and minor connectors are important component parts of partial dentures. Major connectors join the components on opposite sides of the dental arch and must provide rigidity while avoiding pressure on soft tissues. Minor connectors join the major connector to other parts like clasps, rests, and the denture base. Both major and minor connectors work together to distribute forces and provide retention, stability, and support for the partial denture.
1) Surveying involves marking the height of contour and infrabulge on teeth to determine the path of insertion and areas for retention. Guide planes are then prepared parallel to this path to restrict movement.
2) Analysis determines if the initial survey line provides sufficient retention and whether tilting the cast is needed.
3) The final survey line is marked, selecting retentive undercuts opposing the path of displacement. Guide planes are prepared to further limit movement to a single path.
The document discusses various aspects of clasp design for removable partial dentures. It begins by defining what a clasp is and describing different clasp classifications such as occlusally approaching and gingivally approaching clasps. It then examines specific clasp designs like circumferential, bar/Roach type, and combination clasps. The document outlines the functional requirements of clasps, including retention, support, stability, and reciprocation. It also reviews several statements about clasp design, discussing whether prosthodontic experts agree or disagree with them based on clinical factors.
Prosthodontics seminar 3rd stage University of Anbar College Of Dentistry
Created By Mohammed Amer Hekma
Supervised by: Dr Osama Abdul Rasool Hammoodi
References
• FUNDAMENTALS OF REMOVABLE PARTIAL PROSTHODONTIC DESIGN by Kenneth R. McHenry, D.D.S., M.S and Terrence McLean, D.D.S.
• Stewart's Clinical Removable Partial Prosthodontics, Fourth Edition by Rodney D Phoenix, D.D.S, M.S, David R Cagna, D.M.D, M.S and Charles F DeFreest, D.D.S
• McCRACKEN’S REMOVABLE PARTIAL PROSTHODONTICS, TWELFTH EDITION BY Alan B. Carr, D.M.D, M.S, and David T. Brown, DDS, MS
An impression is required to fabricate a fixed dental prosthesis. It must include the prepared teeth as well as surrounding structures. Various impression materials and techniques have been developed over time. Today, alginate, polyether, addition silicone and polyvinyl siloxane are commonly used. Proper tray selection and customization is important to obtain an accurate impression. Impression making requires isolation, tissue retraction and meticulous technique to ensure detail and avoid imperfections.
This document discusses resin bonded fixed partial dentures (RBFPDs). It defines RBFPDs as prostheses that are luted to tooth structure using composite resin. Various types are described, including cantilever, fixed-fixed, and hybrid bridges. Advantages include reduced cost and minimal tooth preparation. Indications are for replacing single missing teeth with caries-free abutments. A case example describes using an RBFPD to replace a missing mandibular incisor and splint mobile abutment teeth.
This document discusses post-insertion complaints with complete dentures. It begins by classifying common and uncommon complaints, such as sore spots, loose fit, speech issues, and more. It then discusses the management of these complaints, including examining denture faults, occlusal discrepancies, retention issues, and other potential causes. The document provides an overview of evaluating and addressing patients' post-insertion complaints to improve the function and comfort of their complete dentures.
This seminar is of postgraduate level, which will be helpful for students. The presenter has added the information from various sources and the references are quoted in the last few slides of the seminar to gather more information about the seminar.
Post insertion problems in complete dentures Rohan Bhoil
Post insertion problems in complete dentures can arise from inaccuracies during the denture construction process. Common complaints include loose dentures, discomfort, poor appearance, and speech problems. Loose dentures may be caused by decreased retention forces or increased displacing forces, and can be addressed by relining or remaking the dentures to improve the fit. Discomfort issues like pain can stem from occlusal errors or poor border extensions, and may be resolved through adjustments like selective grinding. Appearance complaints regarding tooth visibility or lip creasing could require remaking the dentures to correct.
This document discusses the design of removable partial dentures (RPDs). It defines the differences between Class I/II and Class III RPDs, and describes the design sequence including placing rests, major connectors, minor connectors, and direct and indirect retainers. Color codes for design elements are also explained. The objective of RPD design is to control denture movement while preserving oral tissues. Proper design follows diagnostic information and mechanical principles.
Principles of tooth preparation in Fixed Partial DenturesVinay Kadavakolanu
The document discusses principles of tooth preparation for dental restorations. It summarizes that the all-ceramic crown preparation design requires the highest percentage of tooth structure reduction at 65.26%, while ceramic veneers require the lowest at 30.28%. Proper tooth preparation aims to preserve tooth structure, provide retention and resistance, maintain structural durability and marginal integrity, and preserve the periodontium. The amount and location of tooth reduction impacts these factors.
The document summarizes laboratory procedures for fabricating a metal partial denture framework. It discusses preparing the master cast, duplicating the cast, wax pattern and spruing, investing and burnout, casting the framework, and finishing. Key steps include:
1) Preparing the master cast by beading the major connector, spraying with sealant, blocking out undercuts, and providing relief.
2) Duplicating the master cast using reversible hydrocolloid in a flask.
3) Creating the wax pattern by adapting pre-made plastic patterns to the refractory cast and joining them with wax, then spruing the pattern.
4) Investing involves using gypsum, phosphate, or sil
secondary impression / final impression in complete denture.
#prosthodontics
#prostho
BDS 4th year
Nischala Chaulagain
Nobel Medical College , Biratnagar
The document discusses the try-in process for complete denture patients. It defines try-in and trial dentures as preliminary fittings used to evaluate aesthetics, fit, and jaw relationships. The try-in involves extraoral and intraoral examinations to check the denture bases, teeth arrangement, occlusion, retention, stability, and other factors. Adjustments are made to optimize aesthetics, function, and patient comfort before the final dentures are fabricated.
The document discusses the benefits of meditation for reducing stress and anxiety. Regular meditation practice can help calm the mind and body by lowering heart rate and blood pressure. Studies have shown that meditating for just 10-20 minutes per day can have significant positive impacts on both mental and physical health over time.
Temporary removable partial dentures are used for a limited period of time until a more definitive prosthesis can be provided. They serve several objectives like reestablishing esthetics, maintaining space, improving patient tolerance, and conditioning tissues. Some common types of temporary RPDs include interim, transitional, treatment, and immediate RPDs. Acrylic partial dentures are lightweight alternatives to metal partial dentures that are less expensive and easier to construct but also weaker and less hygienic. Their design incorporates acrylic resin, acrylic teeth, and wire clasps.
Major connector removable partial dentureNITIKBAISOYA
The major connectors connect the parts of a partial denture on one side of the arch to the other. They must be rigid to avoid bone and tissue damage. For a maxillary connector, the borders should be at least 6mm from the gingiva and cross the palate at a right angle. Common types of maxillary connectors include the single posterior palatal bar, palatal strap, and anterior-posterior palatal bar. The lingual bar is generally the preferred mandibular connector if space allows, requiring at least 8mm from the gingiva to the floor of the mouth. Relief is needed between mandibular connectors and tissues.
A major connector joins the components on one side of the arch with those on the opposite side. Therefore, all components are attached to the associated major connector either directly or indirectly.
1. Major connectors join the component parts of a removable partial denture together and contribute to its support, bracing, retention, and stabilization functions.
2. The most common types of major connectors include palatal straps and plates. Palatal straps are preferred as they are thinner, cover less tissue, and interfere less with speech and comfort.
3. The design of a major connector depends on factors like the locations of edentulous areas, the need for rigidity and indirect retention, and patient comfort. A middle palatal strap is often the most versatile option.
This document discusses the components and types of major connectors used in removable partial dentures. It describes the requirements and design specifications of maxillary and mandibular major connectors. For maxillary major connectors, it covers palatal bars, straps, plates and their indications. For mandibular major connectors, it discusses lingual bars, sublingual bars, double lingual bars and lingual plates. The major connectors are an important part of partial dentures as they connect all other parts and transmit forces during chewing.
A precise and summarized presentation on Mandibular Major Connector's with vivid pictures and sketches.
This includes various contents like what different types of connectors are explained precisely with their characteristics and location, blocking and relief & how they look like on casts.
Hope this presentation helps you understand the concept
by Dr. Ishaan Adhaulia
IMPORTANCE OF CONTACT POINT IN RESTORATION_104437.pptxFoysalSirazee1
This document discusses the importance of contact points in dental restorations. It defines a contact point as the part of the proximal surface of a tooth that touches the adjacent tooth mesially or distally. Proper reproduction of contact points is important for maintaining stability of the dental arch and preventing problems like food impaction. The document outlines anatomy of contact points, problems with faulty contacts, and how to achieve proper contacts using matrix systems, bands, retainers, wedges and instruments. Sectional matrix systems are highlighted as allowing creation of anatomically correct elliptical contacts.
This document discusses the components and types of major connectors used in removable partial dentures. It describes the requirements and design specifications of maxillary and mandibular major connectors. For maxillary major connectors, it covers palatal bars, straps, plates and the indications and advantages/disadvantages of each. For mandibular major connectors, it discusses lingual bars, sublingual bars, double lingual bars, lingual plates and labial bars.
This document discusses different types of major connectors that can be used in removable partial dentures. It describes the palatal strap, L-bar, horseshoe connector, and complete palatal plate. The palatal strap provides rigidity with minimal metal and enhances retention. The L-bar offers maximum rigidity with minimal bulk. The horseshoe connector is an alternative for patients with palatal tori who want to avoid complete palatal coverage. The complete palatal plate provides the best rigidity and support but can cause soft tissue reactions. The document also notes indications, advantages, and disadvantages for each type of major connector.
This document discusses various types of mandibular major connectors used in removable partial dentures. It defines a major connector as the part that joins components on one side of the dental arch to the other. Six main types are described: lingual bar, sublingual bar, cingulum bar, lingual bar with cingulum bar, linguoplate, and labial bar. Each type has specific indications, contraindications, structural details, advantages and disadvantages. Proper design of mandibular major connectors considers factors like supporting tissues, tooth angulation, interarch space, and patient comfort.
This document discusses major connectors, which connect the components on one side of a dental arch to the other side. It describes the different types of major connectors for the maxilla, including palatal bars, straps, double palatal bars, horseshoe connectors, closed horseshoe connectors, and complete palates. The functions, advantages, disadvantages, and indications for use of each type are explained in detail.
This document discusses the requirements and types of major connectors used in removable partial dentures (RPDs). Major connectors must provide rigidity and strength while avoiding interference with oral structures. Types of maxillary major connectors include U-shaped palatal connectors, posterior palatal straps, single palatal bars, and palatal plates. Mandibular connectors include lingual bars, sublingual bars, linguoplates, continuous bars, and labial/cingulum bars. The appropriate type of major connector depends on factors like the location and extent of missing teeth, the patient's anatomy and preferences, and the need for indirect retention or tooth stabilization.
This document discusses various factors to consider in the design of removable partial dentures (RPDs). It covers 10 key factors: 1) biomechanical considerations and forces acting on RPDs, 2) controlling stress through design, 3) direct and indirect retention methods, 4) clasp design, 5) splinting, 6) the denture base, 7) major and minor connectors, 8) rests, 9) stress equalization techniques, and 10) philosophies of RPD design including broad stress distribution. The goal of proper RPD design is to preserve remaining teeth and restore function while minimizing stress on abutment teeth and soft tissues.
PPT (FINAL)The principles of RPD design & its components (Year 3) .pptxChu Boon
The document provides information on designing removable partial dentures (RPDs) using a simple 5-step routine. It discusses determining the teeth to be replaced, outlining the saddles, planning support, path of insertion, and use of direct and indirect retainers. Major connectors like palatal bars, straps, and plates are described. Minor connectors connect other parts to the major connector. Direct retainers like circumferential clasps and indirect retainers help prevent displacement. Factors like undercut location and clasp design are considered.
2- b. Basic principles for designing Kennedy class II, III and IV Removable P...AmalKaddah1
1-a. Basic principles for designing the removable partial denture (class I partial denture design)
Introduction.
Objectives and Functions of RPD.
Factors that affect RPD design.
Basic principles for designing Kennedy class I partial denture.
2- b. Basic principles for designing Kennedy class II, III and IV Removable Partial Denture(RPD)
2- b. Basic principles for designing Kennedy class II, III and IV RPD - Copy....AmalKaddah1
The document discusses principles of removable partial denture design. It covers factors that influence design like forces in the mouth and conditions of the ridges and abutment teeth. It also discusses biomechanical principles like support, retention, bracing and stabilization. Specific principles for Kennedy class designs are outlined, including the importance of tissue coverage, indirect retention, and stress equalizing components to minimize strain. Modifications for longer edentulous spans are also noted.
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
Major Minor Rest Direct Indirect Retainers.pptxAmmar Al-Kazan
Major connectors unite the major parts of the denture framework and provide cross-arch stability. Minor connectors connect the major connector to other framework components to transfer stresses. Rests and rest seats provide vertical support on tooth surfaces. Direct retainers resist movement away from teeth, while indirect retainers provide retention for distal extension bases when dislodged from their seats. Key considerations in design include rigidity, contour, avoidance of impingement, and ensuring proper cleansing access.
The document discusses contact areas and contours of teeth. It defines fundamental curvatures, proximal contact areas, and labial and buccal contours. Ideal contacts and contours are important for periodontal health, food impaction prevention, and restoration longevity. Proper reproduction of contacts and contours is important to avoid issues. Matrices and wedges are used to establish contours during restorative procedures. Different matrix types like Tofflemire, automatrix, and S-shaped matrices are described.
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2. Major Connectors
“The part of a removable partial denture that joins the components on one side of the
arch to those on the opposite side” (GPT 9th Edition)
Ideal Requirements:-
1. Be Rigid
2. Protect the associated soft tissues
3. Provide a means for obtaining indirect retention where indicated
4. Provide a means for placement of one or more denture bases
5. Promote patient comfort
6. It should be self cleansing and should not allow food accumulation.
3. Types of Maxillary Major Connectors
1. Single Palatal Strap
2. Combination anterior and posterior palatal strap–type connector
3. Palatal plate-type connector
4. U-shaped palatal connector
5. Single palatal bar
6. Anterior-posterior palatal bars
4. Maxillary major connectors: A, Single palatal strap. B, Anterior-posterior palatal
strap. C, Palatal plate. D, U-shaped. E, Single palatal bar. F, Anterior-posterior
palatal bars.
5. Design of Maxillary Major Connectors
Blatterfein in 1953, described a systematic approach to designing maxillary major
connectors. His method involves five basic steps. When using a diagnostic cast and
knowledge of the relative displaceability of the palatal tissue, including that
covering the median palatal raphe, he recommends following steps,
Step 1: Outline of primary bearing areas. The primary bearing areas are those
that will be covered by the denture base(s)
Step 2: Outline of nonbearing areas. The nonbearing areas are the lingual
gingival tissue within 5 to 6 mm of the remaining teeth, hard areas of the medial
palatal raphe (including tori), and palatal tissue posterior to the vibrating line
6. Step 3: Outline of connector areas. Steps 1 and 2, when completed, provide an
outline or designate areas that are available to place components of major
connectors
Step 4: Selection of connector type. Selection of the type of connector(s) is
based on four factors: mouth comfort, rigidity, location of denture bases, and
indirect retention
Step 5: Unification. After selection of the type of major connector based on
considerations in Step 4, the denture base areas and connectors are joined.
7. A, Diagnostic cast of partially edentulous maxillary arch. B, The palatal extent of the denture base areas are located 2 mm from the palatal surface
of the posterior teeth. C, Nonbearing areas outlined in black, which include lingual soft tissue within 5 to 6 mm of teeth, an unyielding median
palatal raphe area, and the soft palate. The space bounded by bearing and nonbearing area outlines is available for placement of the major
connector. D, The major connector selected will be rigid and noninterfering with the tongue and will cover a minimum of the palate.
8. Beading of the Maxillary Cast
Beading is a term used to denote the scribing of a shallow groove on the maxillary master cast
outlining the palatal major connector exclusive of rugae areas.
Framework design on master cast before preparation for duplication in refractory investment. A
shallow groove (0.5 mm) has been scribed on the outline of anterior and posterior borders of the major
connector. The anterior outline follows the valleys of rugae. Beading is readily accomplished with a
cleoid carver. A slightly rounded groove is preferred to a V-shaped groove
9. A, Refractory cast. Note the definitive outline of the major
connector indicated by beading lines that were transferred in
duplicating the master cast. B, The wax pattern for the major
connector is accurately executed by following the beading
lines. The major connector is confined to previously scribed
beading.
The purpose of beading is as
follows:-
1. To transfer the major
connector design to the
investment cast
2. To provide a visible finishing
line for the casting
3. To ensure intimate tissue
contact of the major
connector with selected
palatal tissue
10. ῼ Cast and framework showing metal margin produced by the 0.5-mm beading line scribed
on the cast. Such a margin is easily finished in the lab and provides intimate tissue contact,
preventing food from easily dislodging the prosthesis. Care should be exercised in adapting
such a beaded margin to noncompressible tissue, such as the median palatal raphe.
11. ῼ A, Tissue side of casting. Note slightly elevated ridges outlining
anterior, posterior, and midpalatal opening regions of this anterior-
posterior palatal strap major connector. B, Casting finished to a
demarcated outline and seated on the master cast showing intimate
adaptation.
12. Single Palatal Strap
A major connector of a maxillary removable
partial denture having an anterioposterior
dimension not less than 8 mm that directly or
obliquely traverses the palate; it is generally
located in the area of the second premolar and first
molar. (GPT 9th Edition)
A, This single palatal strap–type major connector is better suited
for the restoration of short-span tooth-supported bilateral
edentulous areas. It may also be used in tooth-supported unilateral
edentulous situations with provision for cross arch attachment by
extracoronal retainers or internal attachments. Width of the palatal
strap should be confined within the boundaries of supporting rests.
B, Sagittal section. Midportion of the major connector
demonstrates slight elevation to provide rigidity. Such thickness of
the major connector does not appreciably alter palatal contours.
13. Indications:-
1. Unilateral distal extension partial dentures (class II)
2. Tooth-supported short-span bilateral edentulous areas (class III)
Advantages:-
1. Offers great resistance to bending and twisting forces because it is located in
three planes (horizontal – palatal vault; vertical – lateral slopes of palate; sagittal
– anterior slope of palate)
2. Produces greater rigidity with less bulk of metal.
3. It can be kept thin, increasing patient comfort.
4. Retention through adhesion and cohesion is enhanced by intimate contact.
5. Also contributes some indirect retention.
14. Disadvantages
1. Patient may complain of excessive palatal coverage – borders should
be properly placed to avoid this.
2. Strap must avoid crossing a torus or a prominent midpalatine suture.
3. Can cause papillary hyperplasia
15. Combination anterior
and posterior palatal
strap–type connector
Anterior-posterior palatal strap–type major
connector. The anterior component is a flat
strap located as far posteriorly as possible to
avoid rugae coverage and tongue interference.
The anterior border of this strap should be
located just posterior to a rugae crest or in the
valley between two crests. The posterior strap
is thin, a minimum of 8 mm wide, and located
as far posteriorly as possible, yet entirely on
the hard palate. It should be located at right
angles to midline rather than diagonally.
16. Combination anterior and posterior palatal strap–type
connector
• Structurally, this is a rigid palatal major connector. The anterior and posterior
palatal strap combination may be used in almost any maxillary partial denture
design.
• Each strap should be at least 8 mm in width and relatively thin in cross section.
Borders of the major connector should be kept 6 mm from the free gingival
margins or should extend onto the lingual surfaces of the remaining teeth.
Palatal borders should exhibit smooth, gentle curves.
• Also sometimes referred to as Closed Horseshoe Major Connector.
17. Indications:-
1.When numerous teeth are to be replaced and torus is present.
2. Kennedy’s class I and II with anterior tooth replacement
Advantages:-
1. Rigid with less thickness.
2. Good palatal support.
3. Strong, L-beam effect.
Disadvantages
Interference with phonetics and
patient comfort in some cases
18. Palatal Plate–type Connector
Palatal major connector covering two thirds of the palate. The
anterior border follows valleys between rugae and does not extend
anteriorly to indirect retainers on the first premolars. The posterior
border is located at the junction of the hard and soft palates but
does not extend onto the soft palate. In the bilateral distal
extension situation illustrated, indirect retainers are a must to aid
in resisting horizontal rotation of the restoration. Note that
provisions have been made for a butt-type joint joining the denture
bases and framework as the denture base on each side passes
through the pterygomaxillary notch.
“A major connector of a removable partial denture
that covers a significant portion of the palatal
surface”
(GPT 9th Edition)
The palatal plate may be used in any one of three
ways
1. It may be used as a plate of varying width that
covers the area between two or more edentulous
areas
2. As a complete or partial cast plate that extends
posterior to the junction of the hard and soft
palates.
3. Or in the form of an anterior palatal connector
with a provision for extending an acrylic resin
denture base in a posterior direction
19. Palatal plate major connector for a Class I,
modification 1 removable partial denture. The
posterior border lies on the immovable hard palate
and crosses the midline at a right angle. Total
contact provides excellent support.
Complete coverage palatal major connector. The
posterior border terminates at the junction of the hard and
soft palates. The anterior portion, in the form of the palatal
linguoplate, is supported by positive lingual rest seats on
canines. The location of finishing lines is most important in
this type of major connector. Anteroposteriorly, they should
be parallel to a line along the center of the ridge crest and
located just lingual to an imaginary line contacting the
lingual surfaces of missing natural teeth. Alteration of the
natural palatal contour should be anticipated with its
attendant detrimental effects on speech if these contours are
not followed
20. A, Maxillary major connector in the form of a palatal linguoplate with provisions
for attaching the full-coverage resin denture base. B, Completed removable partial
denture with resin base. The palatal linguoplate is supported by rests occupying
lingual rest seats prepared in cast restorations on canines. This type of removable
partial denture is particularly applicable when (1) residual ridges have undergone
extreme vertical resorption, and (2) terminal abutments have suffered some bone
loss and splinting cannot be accomplished
21. Indications
1. Kennedy’s class I where length of span is long with anterior modification.
2. Kennedy’s class II with anterior and posterior modification spaces.
3. When opposing arch consists of a full complement of mandibular teeth
and patient has well-developed muscles of mastication, complete palate
provides the needed extra support against vertical displacement.
4. Flat, flabby ridges or shallow palatal vault, complete palate provides best
stabilization.
5. Cleft palate patients with narrow, steep palatal vault
22. Advantage
1. Best rigidity, support and strength.
2. If the palatal coverage is made
with acrylic resin instead of metal,
the removable partial denture is a
temporary, transitional or interim
prosthesis, used to get the patient
accustomed to complete palatal
coverage or as surgical stents
when future relining is predicted
Disadvantage
1. Adverse soft tissue reactions
because of extensive coverage
2. Problem with phonetics.
23. U-shaped Palatal Connector
(Horseshoe Connector)
• The horseshoe connector consists of a
thin band of metal running along the
lingual surfaces of the remaining
teeth and extending onto the palatal
tissues for 6 to 8 mm
• The medial borders of this connector
should be placed at the junction of the
horizontal and vertical slopes of the
palate.
• Least desirable maxillary major
Connector
24. Disadvantages
1. Its lack of rigidity (compared with other
designs) can allow lateral flexure under
occlusal forces, which may induce torque
or direct lateral force to abutment teeth.
2. The design fails to provide good support
characteristics and may permit
impingement of underlying tissue when
subjected to occlusal loading.
3. Bulk to enhance rigidity results in increased
thickness in areas that are a hindrance to the
tongue.
A horseshoe major connector
has a tendency to flex or
deform when a load is placed.
Therefore, it is a poor choice
for most maxillary applications.
25. Indications
• U shaped connector should be used only in those situations in which
inoperable tori extend to the posterior limit of the hard palate
Removable partial denture design that uses an objectionable
U-shaped palatal major connector. Such a connector lacks
necessary rigidity, places bulk where it is most
objectionable to the patient, and impinges on gingival tissue
lingual to remaining teeth
26. Single Palatal Bar
A major connector of a maxillary removable partial denture that crosses the palate
and has a characteristic shape that is half-oval anteroposteriorly with its thickest
portion at the center of the bar connector” (GPT 9th Edition)
• Palatal connector component less than 8 mm in width is referred to as a bar
27. Indication-
1. Interim partial denture.
2. Kennedy’s class III limited to replacing one or two teeth on each side of arch.
Disadvantage-
1. Most difficult for patient to get adjusted as
to maintain rigidity it has to be bulky.
2. Narrow anteroposterior width derives little
support from palate; hence, it should be
positively supported by rests on remaining
teeth.
3. Should be placed no further anteriorly
than second premolar position due to
tongue interference.
4. Should never be used in a distal extension
situation or in class IV.
Advantages-
Palatal bar major connectors are used
primarily in interim applications
28. Anterior and Posterior Palatal Bar–type
Connectors
• The anteroposterior palatal bar displays characteristics of palatal bar and palatal
strap major connectors
• It has basically two bars – one placed anteriorly and the other posteriorly,
connected by flat longitudinal elements on each side of lateral slope of palate.
The flat anterior bar is narrower than palatal strap and should be positioned in
the rugae valleys. The posterior bar is similar to palatal bar but less bulky.
29. Indications-
1. Patients with large inoperable tori.
2. Anterior and posterior abutments are widely separated.
3. Patients who want less palatal coverage.
4. Class II and class IV.
Advantage-
1. Rigidity.
2. Limited soft tissue coverage.
3. Strong L-beam effect contributes to
good resistance.
Disadvantage-
1. Less palatal support, hence cannot be
used when periodontal support of
remaining teeth is poor.
2. Not indicated with high narrow
palatal vault as anterior bar interferes
with phonetics.
3. Multiple borders make it
uncomfortable for patient.