This document discusses resin bonded fixed partial dentures (FPDs). It begins by defining resin bonded FPDs and describing their history. It then covers indications and contraindications, advantages and disadvantages, classifications based on retention type, and fabrication process including tooth preparation, impressions, provisionals, and bonding. Resin bonded FPDs are adhesive bridges that replace missing teeth using thin metal retainers bonded to abutment teeth with resin cement. They conserve tooth structure and have advantages over traditional FPDs like reduced cost and chairtime.
The document discusses various concepts of occlusion for fixed partial dentures, including bilaterally balanced occlusion, unilaterally balanced occlusion, and mutually protected occlusion. Bilaterally balanced occlusion aims for simultaneous contact on both sides but is difficult to achieve, while unilaterally balanced occlusion distributes forces to multiple teeth on the working side only. Mutually protected occlusion relies on anterior guidance to prevent posterior contact during excursive movements. The concepts vary in their distribution of forces and indications depending on a patient's needs.
One of the best seminar of the author. Covered in detail regarding the increasing vertical dimension, centric relation, methods to record centric relation, philosophies of occlusion and in detail everything about full mouth rehabilitation.
This document discusses different types of retainers used for fixed partial dentures (FPDs). It describes various retainer options including full coverage crowns, partial coverage crowns, and conservative retainers. Full coverage crowns provide maximum retention but require extensive tooth preparation. Partial coverage crowns are more conservative but less retentive. Conservative retainers like resin-bonded FPDs require minimal preparation but do not accept heavy loads. The document outlines the characteristics, advantages, disadvantages, and indications for different retainer options.
Charles J. Goodacre presents on provisional restorations in fixed prosthodontics. He discusses the functions and requirements of provisional restorations including protection, mastication, esthetics, positional stability, and providing diagnostic information. He describes various provisional restoration resins and their properties. Goodacre also outlines different types of provisional restorations including prefabricated, custom-fabricated, direct and indirect techniques. He demonstrates techniques for direct provisional restorations using templates and indirect restorations fabricated by a laboratory.
This document discusses resin-bonded fixed partial dentures (FPDs). It introduces resin-bonded FPDs as a way to minimize destruction of sound tooth structure compared to conventional FPDs. Resin-bonded FPDs have a metal framework that is bonded to abutment teeth with resin cement after minimal tooth preparation. Several types of resin-bonded FPD designs are described, including Rochette, Maryland, cast mesh, and Virginia bridges. The techniques, advantages, disadvantages, indications, and contraindications of resin-bonded FPDs are outlined. Tooth preparation for resin-bonded FPDs involves minimal axial reduction and guide planes on proximal surfaces.
This document discusses different types of connectors used in fixed partial dentures (FPDs). It describes rigid connectors that do not allow movement, including cast, soldered, loop, and rigidly-joined multi-unit FPD connectors. It also describes non-rigid connectors that allow limited movement, such as tenon-mortise, split pontic, and cross-pin/wing connectors, which are indicated for situations requiring some flexibility like pier abutments. Special considerations for pier abutments, cantilever FPDs, and replacing canines are also covered.
The document discusses various concepts of occlusion for fixed partial dentures, including bilaterally balanced occlusion, unilaterally balanced occlusion, and mutually protected occlusion. Bilaterally balanced occlusion aims for simultaneous contact on both sides but is difficult to achieve, while unilaterally balanced occlusion distributes forces to multiple teeth on the working side only. Mutually protected occlusion relies on anterior guidance to prevent posterior contact during excursive movements. The concepts vary in their distribution of forces and indications depending on a patient's needs.
One of the best seminar of the author. Covered in detail regarding the increasing vertical dimension, centric relation, methods to record centric relation, philosophies of occlusion and in detail everything about full mouth rehabilitation.
This document discusses different types of retainers used for fixed partial dentures (FPDs). It describes various retainer options including full coverage crowns, partial coverage crowns, and conservative retainers. Full coverage crowns provide maximum retention but require extensive tooth preparation. Partial coverage crowns are more conservative but less retentive. Conservative retainers like resin-bonded FPDs require minimal preparation but do not accept heavy loads. The document outlines the characteristics, advantages, disadvantages, and indications for different retainer options.
Charles J. Goodacre presents on provisional restorations in fixed prosthodontics. He discusses the functions and requirements of provisional restorations including protection, mastication, esthetics, positional stability, and providing diagnostic information. He describes various provisional restoration resins and their properties. Goodacre also outlines different types of provisional restorations including prefabricated, custom-fabricated, direct and indirect techniques. He demonstrates techniques for direct provisional restorations using templates and indirect restorations fabricated by a laboratory.
This document discusses resin-bonded fixed partial dentures (FPDs). It introduces resin-bonded FPDs as a way to minimize destruction of sound tooth structure compared to conventional FPDs. Resin-bonded FPDs have a metal framework that is bonded to abutment teeth with resin cement after minimal tooth preparation. Several types of resin-bonded FPD designs are described, including Rochette, Maryland, cast mesh, and Virginia bridges. The techniques, advantages, disadvantages, indications, and contraindications of resin-bonded FPDs are outlined. Tooth preparation for resin-bonded FPDs involves minimal axial reduction and guide planes on proximal surfaces.
This document discusses different types of connectors used in fixed partial dentures (FPDs). It describes rigid connectors that do not allow movement, including cast, soldered, loop, and rigidly-joined multi-unit FPD connectors. It also describes non-rigid connectors that allow limited movement, such as tenon-mortise, split pontic, and cross-pin/wing connectors, which are indicated for situations requiring some flexibility like pier abutments. Special considerations for pier abutments, cantilever FPDs, and replacing canines are also covered.
Provisional restorations in crowns and bridgesDR PAAVANA
Provisional restorations are temporary restorations used during dental treatment before final restorations are placed. They provide protection, stabilization, and function during treatment. Provisional restorations can be prefabricated or custom-made and are made from materials like polycarbonate, acrylic resin, or bis-acryl composites. They are fabricated using direct or indirect techniques and help evaluate treatment plans before permanent restorations are made.
The document discusses immediate dentures, which are dentures fabricated and inserted immediately following tooth extraction. It describes the different types of immediate dentures, including conventional/classic immediate dentures, interim immediate dentures, labial flange dentures, partial flange dentures, and flangeless/socketed dentures. The advantages of immediate dentures include maintaining a patient's appearance without teeth, providing a bandage effect to extraction sites, and allowing easier adaptation to dentures during healing. However, immediate dentures also present challenges like reduced retention from undercuts caused by remaining posterior teeth.
Fixed partial dentures transmit forces through the abutments to the periodontium. Failures are due to poor engineering, the use of improper materials, inadequate tooth preparation, and faulty fabrication. Of particular concern to prosthodontist is the selection of teeth for abutments. They must recognize the forces developed by the oral mechanism, and resistance.
Successful selection of abutments for fixed partial dentures requires sensitive diagnostic ability. Thorough knowledge of anatomy, ceramics, the chemistry and physics of dental materials, metallurgy, Periodontics, phonetics, physiology, radiology and the mechanics of oral function is fundamental.
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.
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.
JOURNAL CLUB PRESENTATION IN PROSTHODONTICS on ANDREW'S BRIDGE SYSTEMNAMITHA ANAND
This document summarizes a journal club presentation about the Andrews Bridge System. Key points include:
- The Andrews Bridge System is a fixed-removable partial denture that combines fixed retainers connected by a bar with removable pontics for esthetic rehabilitation of edentulous ridges.
- Advantages include improved esthetics, hygiene, phonetics and stress distribution compared to removable partial dentures.
- A clinical case report describes using the system to restore a patient missing maxillary and mandibular anterior teeth following trauma. Post-treatment, the patient had pleasing esthetics and function.
A single complete denture is a complete denture that occludes against some or all of the natural teeth, a fixed restoration, or a previously constructed removable partial denture or a complete denture.
Opposing natural teeth that are sufficient in number and do not necessitate a fixed or removable partial denture.
Opposing a partially edentulous arch in which the missing teeth have been or will be replaced by a fixed partial denture.
Opposing arch with an existing complete denture.
This document provides an overview of implant supported overdentures, including definitions, history, indications, contraindications, advantages, disadvantages, treatment options, and procedures. Key points discussed include:
- Overdentures are removable prostheses that cover natural tooth roots, implants, or both for support.
- Implant supported overdentures have better outcomes than conventional dentures or overdentures supported only by natural tooth roots.
- Treatment options depend on factors like jaw, bone quality, number of implants, and can involve bar-retained or independent attachments.
- Procedures involve medical evaluation, treatment planning, transitional dentures, surgical placement, attachment connection, and definitive prosthesis fabrication
This document discusses immediate complete dentures. It begins by defining immediate dentures and classifying them as either conventional (placed after all teeth are extracted) or interim (placed immediately but replaced later). It describes the ideal requirements, indications, contraindications, advantages, and disadvantages of immediate dentures. The document provides details on the diagnosis and treatment planning process, including patient examination and molding. It explains the clinical technique of making impressions and setting up the jaw relations records. The document concludes with sections on explaining the treatment to patients and providing post-operative instructions.
Provisional restoration in fixed partial denturebhuvanesh4668
This document discusses various techniques for fabricating provisional restorations. It begins by defining provisional restorations and outlining their key requirements and purposes. It then describes common provisional luting materials and different types of provisional restorations that can be used. The remainder of the document focuses on detailing specific techniques for fabricating provisional restorations, including direct fabrication techniques, indirect techniques using impressions or templates, and the use of prefabricated crowns. Key steps are outlined for a variety of techniques.
This document discusses provisional restorations, including their definition, purpose, requirements, and fabrication methods. Provisional restorations are interim prostheses used for a limited time after tooth preparation until a permanent restoration can be placed. They protect the prepared tooth, maintain function and aesthetics, and allow the dentist to assess treatment. Ideal provisionals have biologic requirements like pulp protection and positional stability, mechanical requirements like strength and retention, and aesthetic requirements like color matching. They can be custom-made using various resin or metal materials or prefabricated. Direct, indirect, and combined fabrication techniques are described.
This document provides guidelines for preparing metal-ceramic crown restorations. It describes the indications and contraindications for metal-ceramic crowns as well as their advantages and disadvantages. The preparation involves placing depth grooves, reducing the incisal/occlusal, labial/buccal, and axial surfaces, and finishing the margins. The preparation aims to provide at least 1-2mm of tooth reduction, maintain a continuous 90 degree shoulder, eliminate unsupported enamel, and avoid undercuts.
This document discusses the process and requirements of temporization, which is an important step in preparing fixed partial dentures. There are biological, mechanical, and aesthetic requirements that must be met. The summary discusses the different types of provisional restorations, including custom made vs prefabricated, short term vs long term use, and fabrication techniques like direct, indirect, or direct/indirect methods. A variety of materials can be used including acrylics, composites, and metals. The document also notes some limitations of provisional restorations like lack of strength, poor fit, and poor wear resistance.
Abutment & Its Selection In Fixed Partial DentureSelf employed
This document discusses factors to consider when selecting abutment teeth for fixed partial dentures (FPDs). It defines an abutment tooth and outlines how to assess potential abutments, including taking radiographs and evaluating crown morphology, root configuration, crown-to-root ratio, and other anatomical features. Good abutment teeth are vital with adequate bone and root support and crown structure to withstand forces from the FPD. Location, occlusion, tooth structure and root health must be optimized for successful force distribution from the prosthesis.
Failures in Fixed Partial Denture
(Prosthodontics FPD- Dental science)
Various types of failures in the fabrication of fixed partial denture
Dr.Sachin Sunny Otta
St.Gregorios Dental College,Kothamangalam,Ernakulam
Gingival finish lines in fixed prosthodonticsNAMITHA ANAND
This document discusses different finish line designs used in fixed prosthodontics. It defines a finish line as the junction between prepared and unprepared tooth structure. Common finish line locations are subgingival, equigingival, and supragingival. Common designs include chamfer, shoulder, bevelled shoulder, and knife edge. A chamfer is the preferred design as it provides greater angulation than knife edge but less width than shoulder. Placement depends on factors like esthetics, plaque control, and periodontal health. Subgingival margins are not recommended but may be used when esthetics require. Equigingival placement at the gingival crest is optimal when possible.
This document discusses provisional restorations and their requirements. It defines provisional restorations as temporary restorations designed to enhance function and aesthetics until definitive treatment. Provisional restorations must meet biological, mechanical, and aesthetic requirements. Biologically, they must protect the pulp, maintain periodontal health, and provide positional stability. Mechanically, they must resist functional loads and removal forces. Aesthetically, they must match the tooth's color, shape, and texture. The document discusses various materials used for provisional restorations including acrylic resins, bis-acryl composites, and light-cured resins.
This document discusses various techniques for making impressions for complete dentures. It covers topics like border molding, anatomical considerations for different ridge types, and specialized techniques for resorbed or flabby ridges. For resorbed mandibular ridges, techniques discussed include the conventional, functional, elastomeric, admix, cocktail, and modified functional impression techniques. For flabby ridges, the mucodisplacive and mucostatic impression principles are covered, as well as the one part impression and controlled lateral pressure techniques. The document provides details on selecting the appropriate impression material and technique based on a patient's clinical situation.
The document discusses resin bonded fixed partial dentures (RBFPDs), also known as adhesive bridges. It covers the history, definitions, classifications, indications, contraindications, and various types of RBFPDs including bonded pontics, cast perforated resin-retained FPDs, etched cast resin-retained FPDs, and macro-mechanical retention resin-retained FPDs. Preparation designs for anterior and posterior teeth are described. Bonding involves cleaning, etching, priming, and using composite resin cements.
Resin-bonded fixed partial dentures are fixed partial dentures that are cemented onto abutment teeth using resin. There are different types based on the technique used to finish the tissue surface, including Rochette bridges, Maryland bridges, cast mesh bridges, and Virginia bridges. Maryland bridges use electrolytic or chemical etching to create microscopic porosities on the metal retainer for mechanical bonding with resin. Fabrication involves preparing abutment teeth, making a provisional restoration, designing the prosthesis based on whether it replaces anterior or posterior teeth, and bonding the metal retainer to teeth using either mechanical interlocking/etching or chemical bonding like etching or tin-plating.
Provisional restorations in crowns and bridgesDR PAAVANA
Provisional restorations are temporary restorations used during dental treatment before final restorations are placed. They provide protection, stabilization, and function during treatment. Provisional restorations can be prefabricated or custom-made and are made from materials like polycarbonate, acrylic resin, or bis-acryl composites. They are fabricated using direct or indirect techniques and help evaluate treatment plans before permanent restorations are made.
The document discusses immediate dentures, which are dentures fabricated and inserted immediately following tooth extraction. It describes the different types of immediate dentures, including conventional/classic immediate dentures, interim immediate dentures, labial flange dentures, partial flange dentures, and flangeless/socketed dentures. The advantages of immediate dentures include maintaining a patient's appearance without teeth, providing a bandage effect to extraction sites, and allowing easier adaptation to dentures during healing. However, immediate dentures also present challenges like reduced retention from undercuts caused by remaining posterior teeth.
Fixed partial dentures transmit forces through the abutments to the periodontium. Failures are due to poor engineering, the use of improper materials, inadequate tooth preparation, and faulty fabrication. Of particular concern to prosthodontist is the selection of teeth for abutments. They must recognize the forces developed by the oral mechanism, and resistance.
Successful selection of abutments for fixed partial dentures requires sensitive diagnostic ability. Thorough knowledge of anatomy, ceramics, the chemistry and physics of dental materials, metallurgy, Periodontics, phonetics, physiology, radiology and the mechanics of oral function is fundamental.
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.
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.
JOURNAL CLUB PRESENTATION IN PROSTHODONTICS on ANDREW'S BRIDGE SYSTEMNAMITHA ANAND
This document summarizes a journal club presentation about the Andrews Bridge System. Key points include:
- The Andrews Bridge System is a fixed-removable partial denture that combines fixed retainers connected by a bar with removable pontics for esthetic rehabilitation of edentulous ridges.
- Advantages include improved esthetics, hygiene, phonetics and stress distribution compared to removable partial dentures.
- A clinical case report describes using the system to restore a patient missing maxillary and mandibular anterior teeth following trauma. Post-treatment, the patient had pleasing esthetics and function.
A single complete denture is a complete denture that occludes against some or all of the natural teeth, a fixed restoration, or a previously constructed removable partial denture or a complete denture.
Opposing natural teeth that are sufficient in number and do not necessitate a fixed or removable partial denture.
Opposing a partially edentulous arch in which the missing teeth have been or will be replaced by a fixed partial denture.
Opposing arch with an existing complete denture.
This document provides an overview of implant supported overdentures, including definitions, history, indications, contraindications, advantages, disadvantages, treatment options, and procedures. Key points discussed include:
- Overdentures are removable prostheses that cover natural tooth roots, implants, or both for support.
- Implant supported overdentures have better outcomes than conventional dentures or overdentures supported only by natural tooth roots.
- Treatment options depend on factors like jaw, bone quality, number of implants, and can involve bar-retained or independent attachments.
- Procedures involve medical evaluation, treatment planning, transitional dentures, surgical placement, attachment connection, and definitive prosthesis fabrication
This document discusses immediate complete dentures. It begins by defining immediate dentures and classifying them as either conventional (placed after all teeth are extracted) or interim (placed immediately but replaced later). It describes the ideal requirements, indications, contraindications, advantages, and disadvantages of immediate dentures. The document provides details on the diagnosis and treatment planning process, including patient examination and molding. It explains the clinical technique of making impressions and setting up the jaw relations records. The document concludes with sections on explaining the treatment to patients and providing post-operative instructions.
Provisional restoration in fixed partial denturebhuvanesh4668
This document discusses various techniques for fabricating provisional restorations. It begins by defining provisional restorations and outlining their key requirements and purposes. It then describes common provisional luting materials and different types of provisional restorations that can be used. The remainder of the document focuses on detailing specific techniques for fabricating provisional restorations, including direct fabrication techniques, indirect techniques using impressions or templates, and the use of prefabricated crowns. Key steps are outlined for a variety of techniques.
This document discusses provisional restorations, including their definition, purpose, requirements, and fabrication methods. Provisional restorations are interim prostheses used for a limited time after tooth preparation until a permanent restoration can be placed. They protect the prepared tooth, maintain function and aesthetics, and allow the dentist to assess treatment. Ideal provisionals have biologic requirements like pulp protection and positional stability, mechanical requirements like strength and retention, and aesthetic requirements like color matching. They can be custom-made using various resin or metal materials or prefabricated. Direct, indirect, and combined fabrication techniques are described.
This document provides guidelines for preparing metal-ceramic crown restorations. It describes the indications and contraindications for metal-ceramic crowns as well as their advantages and disadvantages. The preparation involves placing depth grooves, reducing the incisal/occlusal, labial/buccal, and axial surfaces, and finishing the margins. The preparation aims to provide at least 1-2mm of tooth reduction, maintain a continuous 90 degree shoulder, eliminate unsupported enamel, and avoid undercuts.
This document discusses the process and requirements of temporization, which is an important step in preparing fixed partial dentures. There are biological, mechanical, and aesthetic requirements that must be met. The summary discusses the different types of provisional restorations, including custom made vs prefabricated, short term vs long term use, and fabrication techniques like direct, indirect, or direct/indirect methods. A variety of materials can be used including acrylics, composites, and metals. The document also notes some limitations of provisional restorations like lack of strength, poor fit, and poor wear resistance.
Abutment & Its Selection In Fixed Partial DentureSelf employed
This document discusses factors to consider when selecting abutment teeth for fixed partial dentures (FPDs). It defines an abutment tooth and outlines how to assess potential abutments, including taking radiographs and evaluating crown morphology, root configuration, crown-to-root ratio, and other anatomical features. Good abutment teeth are vital with adequate bone and root support and crown structure to withstand forces from the FPD. Location, occlusion, tooth structure and root health must be optimized for successful force distribution from the prosthesis.
Failures in Fixed Partial Denture
(Prosthodontics FPD- Dental science)
Various types of failures in the fabrication of fixed partial denture
Dr.Sachin Sunny Otta
St.Gregorios Dental College,Kothamangalam,Ernakulam
Gingival finish lines in fixed prosthodonticsNAMITHA ANAND
This document discusses different finish line designs used in fixed prosthodontics. It defines a finish line as the junction between prepared and unprepared tooth structure. Common finish line locations are subgingival, equigingival, and supragingival. Common designs include chamfer, shoulder, bevelled shoulder, and knife edge. A chamfer is the preferred design as it provides greater angulation than knife edge but less width than shoulder. Placement depends on factors like esthetics, plaque control, and periodontal health. Subgingival margins are not recommended but may be used when esthetics require. Equigingival placement at the gingival crest is optimal when possible.
This document discusses provisional restorations and their requirements. It defines provisional restorations as temporary restorations designed to enhance function and aesthetics until definitive treatment. Provisional restorations must meet biological, mechanical, and aesthetic requirements. Biologically, they must protect the pulp, maintain periodontal health, and provide positional stability. Mechanically, they must resist functional loads and removal forces. Aesthetically, they must match the tooth's color, shape, and texture. The document discusses various materials used for provisional restorations including acrylic resins, bis-acryl composites, and light-cured resins.
This document discusses various techniques for making impressions for complete dentures. It covers topics like border molding, anatomical considerations for different ridge types, and specialized techniques for resorbed or flabby ridges. For resorbed mandibular ridges, techniques discussed include the conventional, functional, elastomeric, admix, cocktail, and modified functional impression techniques. For flabby ridges, the mucodisplacive and mucostatic impression principles are covered, as well as the one part impression and controlled lateral pressure techniques. The document provides details on selecting the appropriate impression material and technique based on a patient's clinical situation.
The document discusses resin bonded fixed partial dentures (RBFPDs), also known as adhesive bridges. It covers the history, definitions, classifications, indications, contraindications, and various types of RBFPDs including bonded pontics, cast perforated resin-retained FPDs, etched cast resin-retained FPDs, and macro-mechanical retention resin-retained FPDs. Preparation designs for anterior and posterior teeth are described. Bonding involves cleaning, etching, priming, and using composite resin cements.
Resin-bonded fixed partial dentures are fixed partial dentures that are cemented onto abutment teeth using resin. There are different types based on the technique used to finish the tissue surface, including Rochette bridges, Maryland bridges, cast mesh bridges, and Virginia bridges. Maryland bridges use electrolytic or chemical etching to create microscopic porosities on the metal retainer for mechanical bonding with resin. Fabrication involves preparing abutment teeth, making a provisional restoration, designing the prosthesis based on whether it replaces anterior or posterior teeth, and bonding the metal retainer to teeth using either mechanical interlocking/etching or chemical bonding like etching or tin-plating.
This document discusses resin bonded fixed dental prostheses (FPDs). It begins by defining resin bonded FPDs as bridges that are bonded to etched enamel using resin cement, providing mechanical retention without preparation of dentin or pulp. It then covers the indications and contraindications, advantages and disadvantages, classifications including mechanical, micromechanical, macromechanical and chemical types, fabrication process including tooth preparation and bonding, and concludes that resin bonded FPDs can be viable options when carefully indicated and fabricated, requiring the same attention to detail as conventional FPDs.
Ceramic veneers by DR. ABIJITH RAGHAVAN SRAMBIKALAbijith Raghav
This document provides an overview of ceramic veneers. It discusses the history of veneers dating back to the 1930s. The main advantages are a natural appearance, strength, biocompatibility and longevity. Disadvantages include difficulty repairing and irreversible tooth preparation. Ideal candidates have sufficient enamel and good oral hygiene. Contraindications include bruxism and insufficient enamel. The document outlines materials, preparation techniques, and procedures like shade selection and cementation. It provides guidance on margin design, proximal preparations and considerations for mandibular veneers.
Resin bonding FOR MAXILLOFACIAL PROSTHESES.pptxAmmar Al-Kazan
This document discusses resin bonding techniques for maxillofacial prostheses. It describes both subtractive and additive methods for creating resin bonded contours, with the additive method being preferable for creating multiple guide planes, especially on palatal surfaces. Both composite resin and metal bonded contours are discussed. Precision and semi-precision attachments can be used for large defects next to abutment teeth. Potential problems include trismus, loss of attachment, and difficulty replacing lost metal components.
Resin retained fpd/ oral surgery courses / oral surgery courses 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: 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 document discusses principles of tooth preparation for fixed partial dentures. It covers objectives like reducing tooth structure for retention while preserving healthy tooth structure. Principles include conservative preparation with minimal taper and preservation of tooth structure. Margin placement should be supragingival when possible. Margin designs like chamfer and shoulder are described. Tooth preparation creates retention and resistance for fixed restorations.
This document discusses tooth preparation guidelines for all-ceramic crowns on maxillary central incisors. It outlines the necessary reduction on the incisal, labial, lingual, and proximal surfaces to a depth of 1.5mm to properly support an all-ceramic crown restoration. Specific rotary instruments are recommended for reducing each surface to produce tapered, rounded internal line angles and a smooth finished shoulder margin. All-ceramic crowns offer advantages like translucency and biocompatibility but require careful tooth preparation to ensure mechanical success long-term.
principles of tooth preparation - ann george final.pptxHimanshu Tiwari
This document discusses principles of tooth preparation for dental restorations. It covers 3 main topics:
1. Biological principles including conservation of tooth structure, preventing damage to adjacent teeth and soft tissues, and the pulp.
2. Mechanical principles such as retention form, resistance form, and structural durability.
3. Aesthetic principles regarding metal-ceramic and partial coverage restorations.
It also describes different margin designs including chamfer, shoulder, knife edge, and their indications. Maintaining margin integrity through proper placement, geometry and adaptation is emphasized.
principles of tooth preparation - ann george final.pptxDrHIMANSHUTIWARI1
No recent literature has reviewed the current scientific knowledge on complete coverage tooth preparations.Nine scientific principles have been developed that ensure mechanical, biologic, and esthetic success for tooth preparation of complete coverage restorations.
Finish lines/cosmetic dentistry course by Indian dental academyIndian 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.
The document discusses principles of tooth preparation for restorations. It covers preserving tooth structure, providing retention and resistance form, maintaining structural durability of the restoration, achieving integrity at the margins, and preserving the surrounding periodontium. Specific techniques are described such as beveling functional cusps to allow for adequate bulk of restorative material and withstanding forces of occlusion. Margin types like chamfer, shoulder, and knife edge finishes are also outlined.
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.
INTRODUCTION- Removable partial denture: the replacement of missing teeth and supporting tissues with a prosthesis designed to be removed by the wearer-GPT.
Cast partial denture is a type of partial denture comprising a cast metal framework with acrylic resin prosthetic teeth.
Traditional acrylic partial dentures are less durable, retentive, and stronger than cast partial dentures.
The document discusses principles of tooth preparation for restorations. It covers 3 main categories: biologic considerations to protect surrounding tissues, mechanical considerations to provide retention and resistance for the restoration, and esthetic considerations for appearance. Specific topics include margin placement, adaptation and geometry, conservation of tooth structure, prevention of pulpal damage, and providing adequate taper, surface area, and freedom of displacement for retention.
Finish lines/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
This document discusses laminate veneers, including:
1. Laminate veneers have evolved over decades to become a popular aesthetic restoration, providing a conservative alternative to full coverage restorations.
2. They involve bonding thin ceramic restorations to etched tooth structure to restore the facial and proximal surfaces.
3. Indications include masking diastemas, discoloration, enamel defects, malpositioned teeth, while contraindications include insufficient tooth structure or parafunctional habits.
Walmart Business+ and Spark Good for Nonprofits.pdfTechSoup
"Learn about all the ways Walmart supports nonprofit organizations.
You will hear from Liz Willett, the Head of Nonprofits, and hear about what Walmart is doing to help nonprofits, including Walmart Business and Spark Good. Walmart Business+ is a new offer for nonprofits that offers discounts and also streamlines nonprofits order and expense tracking, saving time and money.
The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
How to Make a Field Mandatory in Odoo 17Celine George
In Odoo, making a field required can be done through both Python code and XML views. When you set the required attribute to True in Python code, it makes the field required across all views where it's used. Conversely, when you set the required attribute in XML views, it makes the field required only in the context of that particular view.
Leveraging Generative AI to Drive Nonprofit InnovationTechSoup
In this webinar, participants learned how to utilize Generative AI to streamline operations and elevate member engagement. Amazon Web Service experts provided a customer specific use cases and dived into low/no-code tools that are quick and easy to deploy through Amazon Web Service (AWS.)
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxEduSkills OECD
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2. Contents
• Introduction
• Indications and contraindications
• Advantages and disadvantages
• Classification
Mechanical (Rochette bridge)
Micromechanical (Maryland bridge)
Macromechanical
Chemical (adhesive bridges)
• Fabrication
Tooth preparation
Impressions and provisionals
Bonding
Maintenance and recall
Failures
• Conclusion
• Reference
3. Introduction
DEFINITION:
A fixed dental prosthesis that is luted to tooth structures, primarily enamel, which has
been etched to provide mechanical retention for the resin cement.(GTP8)
It is also termed as ‘adhesivebridge’.
First described by Rochette in 1973 (mandibular anterior teeth)
It involves replacing teeth by attaching pontics to thin metal retainers, which are
bonded to the palatal/ lingual surface of the abutments using resin cements
4. Indications and contraindications
INDICATIONS CONTRAINDICATIONS
1. Replacement of missing anteriors in
children and adolescents.
1. Insufficient occlusal clearance
2. Abutments with sufficient enamel to etch
for retention
2. When facial aesthetics of the teeth require
a change.
3. Short span bridges 3. Short clinical crown.
4. Splinting periodontally weak teeth 4. Thin anterior teeth faciolingually
5. Medically compromisedpatients 5. Deep vertical overlap
6. As a long term temporary restoration in
patients with craniofacial anomalies
6. Insufficient enamel availablefor bonding-
caries, restorations, hypoplasia
7. Postorthodontic retention 7. Parafunctinal habits
8. Long span bridges
9. Sensitivity to base metal alloys
5. Advantages and disadvantages
ADVANTAGES
1. Conservation of tooth structure, preparation is confinedto enamel.
2. Tolerant to tissues with no pulpal trauma and supragingival margins.
3. Anesthesianot required.
4. Impression making is easy.
5. Provisional restorations are not required.
6. Less chairside time.
7. Does not require cast alterations or removable dies.
8. Reduced cost.
9. Rebonding possible.
6. DISADVANTAGES
1. Longevity is in question.
2. Technique is sensitive.
3. Space, contour and alignment correction of abutment not possible.
4. Possibility of over contouring is high which can lead to increased plaque accumulation
5. Can be used to replace only one tooth.
6. Can cause ‘greying’ in thin teeth.
7. Aesthetics is moderate.
7. CLASSIFICATION
• Resin bonded fixedpartial dentures are classified based on the type of retention
utilizedby the retainers
1. Mehanical
2. Micromechanical
3. Macromechanical
4. Chemical
8. Mechanical (Rochette bridge)
• It was developedin 1973 by Rochette
• This was the first resin-bonded prosthesis to be developed.
• Rochette utilizeda wing-like retainer with multipleflared perforations to provide
mechanical retention for resin cement
• This was used at that time for both anterior and posterior fixedpartial dentures
• A clinical study by Boyer et al. (1993) reported that anterior FPDs with perforated
retainers had a 50% failure in 110 months and 63% in 130 months.
9. Limitations
• Perforations weakened the metal retainers.
• The resin in the perforations was exposed to oral fluids,which caused wear and
microleakage.
• Retention providedby the perforations was limited.
10. Micromechanical (Maryland bridge)
• It was developed by Livaditis and Thompson at the University of Maryland in 1981
• Electrolyticetching was used to provide micromechanical retention to
nonperforated base metal retainers, bonded by resin cement
• For etching they used a 3.5% solution of nitric acid with a current of 250 mA/cm2 for 5
min followedby immersion in 18% hydrochloric acid solution in an ultrasonic cleaner for
10 min.
11. Advantages
• Better retention than perforated retainers
• Highly polishedretainers preventedplaque accumulation.
Limitations
• Highly technique sensitive depending on procedure adopted at laboratory.
• Variable results were reported for etching the same alloy
• Retention decreased with time
12. Macromechanical
1.Virginiabridge
• It was developed by Moon and Hudgins at the University of Virginiain 1983.
• Utilizedmacroscopic mechanical retention using ‘lost salt crystal technique’
Procedure
The die is lubricated and sievedcubic salt (NaCl) 150–250 microns is sprinkled on the
surface leaving out the margins.
• A resin pattern is now constructed over the salt allowing it to get incorporated in the
resin.
• The salt is then dissolvedby placing the set pattern in an ultrasoniccleaner. This leaves
behind voids in the pattern, which are reproduced in the casting. This provides the
retention.
13. Advantages
• Procedure can be used with any metal.
• Bonding to metal superior to electrolytic method.
Disadvantage
• Thickness of retainer is increasedto allow for retentivelayer.
14. 2. Cast mesh fixedpartial denture.
A nylon mesh is placed on the palatal/lingual surface of the abutment die and the
pattern is fabricated over this mesh.
The mesh gets incorporated and following casting provides retention for resin to metal
Disadvantages
• Adaptation of the nylon mesh to the cast is not good.
• The wax may flow in between the mesh locking all the undercuts.
15. Chemical (adhesive bridges)
These are now the most commonly used methods for bonding the resin cements to
metal.
Their high bond strength, fracture toughness and long-term clinical success have
rendered alloy etching and macroscopic retention mechanisms obsolete. The following
materials are employed
1. Modified bis-GMA cement
• This was developedin the mid-1980s.
• A metal primer (similar to a silanecoupling agent) is used to bond the resin cement to
metal alloys.
• This is effectivefor both noble and base metal alloys.
• A popular resin, cement Panavia uses 10-methacryloyloxydecyl dihydrogen phosphate
(10-MDP) as the adhesion promoter or primer.
• This primer is applied to the fitting surface of the metal retainer following sandblasting
with 50microns alumina, before cementing the prosthesis.
16. • 2. Superbond
• This resin cement was developedin Japan in the 1983.
• In this resin system,the powder is a polymer of methyl methacrylate and liquidis
composedof methyl methacrylate modifiedwith adhesion primer 4-META (4-
methacryloxyethyl trimellitic anhydride).
• A unique catalyst tri-n-butyl borane is added to the liquidbefore mixing with powder.
• The set resin cement has a chemical bond to base metal alloys. For bonding to noble
metal alloys, a special primer has been developed.
3. Rocatec system
This is a laboratory methodof bonding to both noble and base metal alloys.
• Fitting surface of metal is sandblasted (abraded) with 120microns alumina.
• This is followedby abrasion with a special silicate particle containing alumina, which
deposits a coating of silicaand aluminaon alloy surface.
• A silane coupling agent is then applied to bond the metal to the resin cement.
17. Fabrication
TOOTH PREPARATION
PRINCIPLES
• Lingual-axial reduction following the anatomic planes.
• Proximal preparation must extend labially just beyond contact dictated by aesthetics.
• Should encompass at least 180° of tooth.
• Supragingival chamfer finish line.
• Occlusal clearance of 0.5 mm where required.
• Resistance can be enhanced with proximal grooves, boxes
• Vertical stops or support can be provided by countersinks or cingulum rest in anterior
abutments and occlusal rests in posteriors
18.
19. Anterior preparation design and sequence
Lingual cingulum
Depth orientation grooves are placed with a No. 1 round bur (1 mm diameter) on the
lingual cingulum surface and reduced with a wheel diamondto provide 0.5 mm
clearance. Preparation is terminated1.5–2 mm from the incisal edge.
20. Countersink or cingulum rest
Flat notches or countersinksare prepared on lingual surface using a flat-end tapering
diamond. Alternately, a cingulum rest can also be prepared.
21. Proximal
Proximal reduction adjacent to edentulous space shouldensure resistanceform and
prevent any unsightly metal display. It is prepared in two planes – labial and lingual using
round-end tapering diamond.
If creation of labial plane will display metal, then a proximal groove is placed far enough
labially as dictated by aesthetics. The groove is prepared with a flat-end tapering fissure
bur parallel to the incisal two-thirds of the labial surface
22. Lingual axial
The lingual-axial preparation is continuedfrom the proximal preparation adjacent to the
edentulous space, continuedaround the cingulum and stopped just short of the contact
on the other proximal surface. The surface is prepared with round-end tapering diamond
parallel to the path of placement
23. Posterior preparation design and sequence
Proximal and lingual-axial preparations are only aimedat lowering the height of contour
and creating parallel surfaces. Height of the contour is lowered to within 2 mm of the
gingival margin.
24. The proximal preparation adjacent to the edentulous space shouldextend beyond the
facial line angle. It is extended as far as possibleto the embrasure of the opposite side
such that 180° encirclement is achieved. A short thin tapering diamond/needle diamond
is used for the preparation which results in a knife-edge finish line.
25. An occlusal rest is prepared adjacent to the edentulous space similar to the removable
partial dentures. Its dimensions shouldbe 1.5–2 mm faciolingually and mesiodistally, and
1–1.5 mm in-depth. The vertical walls shouldbe very distinct unlike rests for RPD to
prevent lateral movement and preparation shouldbe progressively deeper as it moves
from the marginal ridge to fossa.
26. • In most cases occlusal clearance may not be needed because of placement of
centric stops away from the framework. If required, a clearance of 0.5 mm is given.
27. IMPRESSIONS AND PROVISIONALS
• Impression making is similar to any other fixed partial denture.
• Elastomeric impression materials are indicated.
• A single-impressiontechnique, double mix using putty and light body is preferred as
amount of tooth preparation is minimal.
28. BONDING
• The prepared tooth surface is cleaned using pumiceand water.
• 37% phosphoric acid is used to etch the prepared enamel for 15 s. It is then rinsed and
dried.
• Specially formulated composite resin cements are available for bonding RBFPDs
• A metal primer or silaneis applied on the fitting surface of the casting as
recommended by the manufacturer of the resin cement.
• A bonding agent or primer is also applied on the prepared enamel surface as
recommended by the manufacturer.
• Resin cement is mixedand placed on the internal surface of the retainer.
• The prosthesis is inserted and finger pressure is maintainedfor 60s till the initial set. The
excess cement is removedand material is allowedto completely set. The manufacturer’s
instructions are followedregarding protecting the margins from oxygen depending on
whether the cement is autopolymerizing or dual cured.
• The occlusion is adjusted and the margins are finished and polished.
29. MAINTENANCE AND RECALL
• Resin-bondedrestorations shouldbe reviewedand maintained through periodic recall
appointments.
• Any signs of debonding if detected early can prevent unnecessary damage to the
abutments.
• Periodontal health should also be reviewed and maintaineddue to the propensity of
the retainer to accumulate plaque and over contouring of lingual surface.
30. FAILURES
INAPPROPRIATE PATIENT SELECTION
1. Malalignment of teeth resulting in poor path of insertion
2. Short abutments
3. Thin abutments
4. Inadequate enamel for bonding
5. History of metal sensitivity
6. Heavy occlusal forces
31. INCOMPLETE TOOTH PREPARATION
1. Inadequate proximal and lingual reduction
2. Less than 180 extensionof the retainer
3. Lack of clearance in protrusion
BONDING FAILURE
1. Contamination
2. Prolonged mixing
3. Inappropriate luting agent
32. Conclusion
Resin-bondedprostheses are viable prostheses in select situations.They shouldreceive
the same attention to detail as conventional fixed partial dentures for long-term success.
Patient selection is vitally important and the tooth preparation or enamel activation is
mandatory. Although newer metal-free ceramicresin-bonded bridges show promising
results, we have to wait for long-term results to replace the conventional metal resin-
bonded restorations.