Endodontically treated teeth require careful treatment planning to maintain a proper coronal seal and prevent recontamination of the root canal. Both an adequate endodontic treatment and coronal restoration are important for long-term success, with some studies finding the quality of restoration has a greater impact. Teeth with significant loss of structure often require full coverage restorations to protect against fracture from occlusal stresses. Factors like post length, diameter and ferrule effect should be considered for teeth receiving posts and cores. Maintaining biologic width is also important for proper restoration margins.
Restoration of endodontically treated teeth review & treatment recomendationsJinny Shaw
This document reviews recommendations for restoring endodontically treated teeth. It discusses the importance of coronal restorations in preventing bacterial leakage into the root canal. Temporary fillings should provide an effective barrier against contamination, while permanent restorations should minimize microleakage and reinforce the tooth. A ferrule of 1-2mm of tooth structure above the finish line significantly improves fracture resistance. When possible, posts should extend to the height of the clinical crown and be cemented with bonding agents to further reduce microleakage. Overall restorations aim to seal the root canal system and protect the weakened tooth from fractures.
Recent concepts in post endodontic restorationshemam22
This document discusses recent concepts in post endodontic restorations. It notes that with advances in adhesive dentistry, there are now multiple treatment options for restoring endodontically treated teeth. However, determining whether cuspal coverage is needed and selecting the appropriate treatment can be challenging. There has been a paradigm shift from relying on mechanical retention to using adhesion. The document discusses several key concepts including the importance of preserving remaining tooth structure and establishing a ferrule effect to strengthen the restoration and resist forces.
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.
A dental implant is an artificial titanium fixture that is surgically placed into the jaw bone to substitute for a missing tooth and its roots. In the early 1950s, it was discovered that titanium forms a permanent biological bond with living bone tissue, called osseointegration. There are various types of implants, including screw and cylinder implants. The implant placement procedure involves two surgical phases to uncover and attach an implant crown. Surface modifications like passivation and texturing can improve osseointegration and the success of implants.
Restoration of endodontically treated teeth / dental implant coursesIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
The document describes 4 case reports involving restoration of badly broken teeth. Case 1 describes restoration of an endodontically treated tooth with a custom post and crown. Case 2 describes restoration of a posterior tooth with a biological post. Case 3 describes restoration of a molar with an endo-crown. Case 4 describes restoration of an anterior tooth with a pin-retained restoration after fracture. Each case report provides details of the clinical situation, treatment plan, and procedures performed to restore the broken teeth.
This document discusses biological width, which refers to the combined width of connective tissue and epithelial attachment adjacent to a tooth above the alveolar bone crest. The biological width was found to be approximately 2.04mm on average. Maintaining the biological width is important for periodontal health. There are several factors that can impact the biological width, such as the location and finish of restorative margins, gingival displacement techniques, crown contours, and subgingival debris. Violations of the biological width can be evaluated clinically and radiographically. Various techniques exist to correct biological width violations, including surgical crown lengthening procedures and orthodontic extrusion methods.
Restoration of endodontically treated teeth review & treatment recomendationsJinny Shaw
This document reviews recommendations for restoring endodontically treated teeth. It discusses the importance of coronal restorations in preventing bacterial leakage into the root canal. Temporary fillings should provide an effective barrier against contamination, while permanent restorations should minimize microleakage and reinforce the tooth. A ferrule of 1-2mm of tooth structure above the finish line significantly improves fracture resistance. When possible, posts should extend to the height of the clinical crown and be cemented with bonding agents to further reduce microleakage. Overall restorations aim to seal the root canal system and protect the weakened tooth from fractures.
Recent concepts in post endodontic restorationshemam22
This document discusses recent concepts in post endodontic restorations. It notes that with advances in adhesive dentistry, there are now multiple treatment options for restoring endodontically treated teeth. However, determining whether cuspal coverage is needed and selecting the appropriate treatment can be challenging. There has been a paradigm shift from relying on mechanical retention to using adhesion. The document discusses several key concepts including the importance of preserving remaining tooth structure and establishing a ferrule effect to strengthen the restoration and resist forces.
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.
A dental implant is an artificial titanium fixture that is surgically placed into the jaw bone to substitute for a missing tooth and its roots. In the early 1950s, it was discovered that titanium forms a permanent biological bond with living bone tissue, called osseointegration. There are various types of implants, including screw and cylinder implants. The implant placement procedure involves two surgical phases to uncover and attach an implant crown. Surface modifications like passivation and texturing can improve osseointegration and the success of implants.
Restoration of endodontically treated teeth / dental implant coursesIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
The document describes 4 case reports involving restoration of badly broken teeth. Case 1 describes restoration of an endodontically treated tooth with a custom post and crown. Case 2 describes restoration of a posterior tooth with a biological post. Case 3 describes restoration of a molar with an endo-crown. Case 4 describes restoration of an anterior tooth with a pin-retained restoration after fracture. Each case report provides details of the clinical situation, treatment plan, and procedures performed to restore the broken teeth.
This document discusses biological width, which refers to the combined width of connective tissue and epithelial attachment adjacent to a tooth above the alveolar bone crest. The biological width was found to be approximately 2.04mm on average. Maintaining the biological width is important for periodontal health. There are several factors that can impact the biological width, such as the location and finish of restorative margins, gingival displacement techniques, crown contours, and subgingival debris. Violations of the biological width can be evaluated clinically and radiographically. Various techniques exist to correct biological width violations, including surgical crown lengthening procedures and orthodontic extrusion methods.
restoration of endodontically treated teeth cast postSherif Sultan
The document discusses the restoration of endodontically treated teeth. Special techniques are needed depending on the tooth type and remaining structure. Teeth must be carefully evaluated before restoration for factors like apical seal. Posterior teeth generally require cuspal coverage due to greater forces. Considerations for preparation include conserving tooth structure, achieving retention and resisting forces. The procedures involve removing filling material, enlarging the canal, and preparing coronal structure. Custom posts are used for non-circular canals while prefabricated posts are used for circular canals.
This document discusses strategies for minimally invasive endodontics. It emphasizes preserving tooth structure to maximize strength and longevity. Smaller access openings and conservative root canal shaping are recommended to avoid weakening tooth structure. Thorough disinfection can still be achieved with smaller canal preparations when combined with improved irrigation methods. Restorations should maintain coronal and peri-cervical tooth structure to reinforce the tooth through the "ferrule effect." The goal of minimally invasive endodontics is effective treatment while minimizing structural damage to teeth.
Restoration of endodontically treated teethSanket Pandey
Seminar on restoration of endodontically treated tooth.
Credits to Cohen, Ingle, Respected researchers for their research in this field.
and everyone who previously tried to make a good presentation using the research work.
Ferrule refers to a band of metal that encircles the external surface of a tooth. It strengthens root-filled teeth by resisting various stresses. A minimum ferrule height of 1.5-2mm is recommended. Factors like ferrule height, width, location, tooth type, post type, and core material affect its functionality. Ferrule promotes better fracture resistance and allows for repairable fractures versus non-repairable fractures without it. When ferrule cannot be created, crown lengthening or forced eruption can help generate tooth structure for ferruling.
Effect of ferrule and post - journal club Effect of ferrule and post placemen...Partha Sarathi Adhya
The study evaluated the effect of ferrule placement and post placement on the fracture resistance of endodontically treated teeth after fatigue loading. 40 teeth were divided into 4 groups: no ferrule-no post, no ferrule-post, 2mm ferrule-no post, 2mm ferrule-post. Teeth underwent fatigue loading and fracture testing. Results showed the highest fracture resistance in the 2mm ferrule-no post group, followed by the 2mm ferrule-post group. Only teeth with a ferrule restored without a post did not experience non-repairable root fractures. The study concludes that a 2mm ferrule can improve fracture resistance as much as adding
Rationale of post endodontic restoration /certified fixed orthodontic cours...Indian dental academy
Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable.
Rehabilitation of endodontically treated teeth : Post & CoreNaveed AnJum
These days we often come across mutilated or badly broken teeth in our practice. However various factors are involved for a better prognosis of such a teeth. This presentation mainly focuses on post and core treatment of such a teeth.
Restoration of endodontically treated teethLama K Banna
The document discusses pre-treatment evaluation and restoration options for root canal treated teeth. It covers evaluating the endodontic treatment, periodontal health, biomechanics, and esthetics. Restoration options depend on remaining tooth structure and are classified into 5 classes. Post selection considers root length, diameter, canal configuration and coronal structure. Custom posts can be made directly or indirectly from various materials to best suit each case.
Restoration of endodontically treated teethAnish Amin
Restoration of endodontically treated teeth often requires posts and cores to provide adequate retention and resistance for weakened teeth. Key principles for posts and cores include preserving tooth structure, maximizing retention through post length and design, and providing resistance through features like ferrules. Posts and cores are indicated when there is significant loss of coronal tooth structure and the risk of fracture is high. The amount of remaining tooth structure, presence of a ferrule, and post length and design all influence the success of a post and core restoration.
This document discusses post and core procedures for endodontically treated teeth. It covers objectives, indications, considerations for post length, diameter and design. Ideal post length is 1-2 mm shorter than the root and diameter should allow at least 1 mm of dentin surrounding the post. A ferrule is important to improve structural integrity. Post types discussed include custom cast metal posts, prefabricated metal posts like stainless steel and titanium, and non-metal options like carbon fiber, fiber-reinforced and zirconia posts. Fiber posts are more esthetic and flexible but have less strength than metal or zirconia posts. Proper diagnosis and treatment planning is required to select the best post and core for
Root canal treated teeth are more prone to fracture due to changes that occur during treatment like loss of tooth structure and changes to dentin collagen fibers. Posts are often used to restore these teeth and can be classified by their retention, composition, or shape. Fiber posts made of materials like carbon, silica or glass fibers have properties similar to dentin and improve stress distribution compared to metal posts. Bonding fiber posts requires an adhesive system and resin cement, but the root canal environment poses challenges to achieving optimal bonding due to factors like the dentin substrate, smear layer, chemicals used in treatment, and limited light penetration. Careful cleaning, selection of sealers, and final irrigation can help improve bond strength.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
This document discusses post-retained endodontic restorations. It begins by explaining that posts are used to retain coronal restorations when there is significant tooth structure loss after endodontic treatment. The post must be firmly fixed in the root to withstand loads without fracturing. There are four parts to a post-retained restoration: residual tooth structure, dowel/post, core material, and coronal restoration. The document then discusses considerations for using posts in different types of teeth, types of posts, materials used for posts, and principles for achieving success with post-retained restorations.
Titanium and its alloys are commonly used for dental implants due to their biocompatibility and ability to osseointegrate with bone. Dental implants come in various shapes and types, including endosseous implants which are screwed or pressed into the jawbone, transosseous implants which transverse the mandible, and subperiosteal implants which rest on top of the jawbone. Successful osseointegration of dental implants depends on factors like material biocompatibility, implant surface properties, bone quality, surgical technique, and proper post-operative healing.
Restoration of endodontically treated teeth 1 /certified fixed orthodontic c...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 considerations for fixed prosthodontics in patients with compromised periodontal health. Key points include:
- Periodontal health plays an important role in the longevity of restorations, and defective prostheses can contribute to periodontal disease progression. Successful treatment requires cooperation between periodontists and prosthodontists.
- Periodontal issues must be resolved before restorative treatment to avoid tensions on the periodontium from tooth movement. Supragingival margins and open embrasures are preferred for periodontal health.
- Temporary splinting can help determine the prognosis of a permanent restoration in periodontally compromised patients. Occlusion should not interfere with plaque control.
This document discusses the restoration of endodontically treated teeth. It begins by outlining the changes that occur to teeth after endodontic treatment, including loss of tooth structure and changes to physical and esthetic characteristics. It then discusses general considerations for restoring such teeth, including risks of fracture or reinfection. Various factors for treatment planning are outlined, including remaining tooth structure, position, function, and esthetics. Types of posts are described, including active vs. passive posts and various materials. Key principles for posts involving retention, resistance, length, preservation of tooth structure, and the ferrule effect are explained.
Restoration of endodontically treated teeth.Anish Amin
provides an overview of restoring endodontically treated teeth using posts and cores. It discusses the historical background of posts and describes characteristics of teeth that have undergone endodontic treatment. Key points include that these teeth often have reduced strength and require special considerations for retention and resistance. The document outlines indications for posts and cores, principles of preservation of tooth structure and providing retention and resistance. It also describes methodologies for various steps of the post and core procedure.
This document summarizes research on the success rates and complications of resin bonded prostheses (RBPs). It finds that on average, 26% of RBPs experience complications within 4 years, increasing to 28% after 5 years, with debonding being the most common at 21%. Debonding rates are higher for posterior teeth, longer spans, and cantilever designs. Tooth preparation techniques like covering lingual and proximal surfaces, adding proximal grooves or pinholes, and occlusal rests can reduce debonding. Maintaining a minimum of 0.5mm occlusal clearance and 1mm metal thickness also impacts success. Proper diagnosis, treatment planning and cementation techniques are keys to optimizing longevity
RCT fixed expert 23-24pptx.pdf second partEl Sayed Omar
The document discusses several factors that are important for restoring endodontically treated teeth, including the need for full coverage restorations, use of posts, and biologic width considerations. It notes that adequate coronal restoration is equally as important as endodontic treatment. Factors like tooth type, structure loss, and occlusal stresses determine need for full coverage restorations. Post length, diameter, and ferrule effect are important principles for restoring teeth with posts. Techniques for managing severely damaged teeth like crown lengthening and orthodontic extrusion are also covered.
The document provides an introduction to dental implants, discussing why they are used to maintain bone volume, preserve adjacent teeth, and provide a natural emergence profile. It describes the different types of implants including root form, blade, and ramus frame implants and explains the process of osseointegration. The document also covers implant abutment connections, surface treatments, and relative and absolute contraindications for dental implants.
restoration of endodontically treated teeth cast postSherif Sultan
The document discusses the restoration of endodontically treated teeth. Special techniques are needed depending on the tooth type and remaining structure. Teeth must be carefully evaluated before restoration for factors like apical seal. Posterior teeth generally require cuspal coverage due to greater forces. Considerations for preparation include conserving tooth structure, achieving retention and resisting forces. The procedures involve removing filling material, enlarging the canal, and preparing coronal structure. Custom posts are used for non-circular canals while prefabricated posts are used for circular canals.
This document discusses strategies for minimally invasive endodontics. It emphasizes preserving tooth structure to maximize strength and longevity. Smaller access openings and conservative root canal shaping are recommended to avoid weakening tooth structure. Thorough disinfection can still be achieved with smaller canal preparations when combined with improved irrigation methods. Restorations should maintain coronal and peri-cervical tooth structure to reinforce the tooth through the "ferrule effect." The goal of minimally invasive endodontics is effective treatment while minimizing structural damage to teeth.
Restoration of endodontically treated teethSanket Pandey
Seminar on restoration of endodontically treated tooth.
Credits to Cohen, Ingle, Respected researchers for their research in this field.
and everyone who previously tried to make a good presentation using the research work.
Ferrule refers to a band of metal that encircles the external surface of a tooth. It strengthens root-filled teeth by resisting various stresses. A minimum ferrule height of 1.5-2mm is recommended. Factors like ferrule height, width, location, tooth type, post type, and core material affect its functionality. Ferrule promotes better fracture resistance and allows for repairable fractures versus non-repairable fractures without it. When ferrule cannot be created, crown lengthening or forced eruption can help generate tooth structure for ferruling.
Effect of ferrule and post - journal club Effect of ferrule and post placemen...Partha Sarathi Adhya
The study evaluated the effect of ferrule placement and post placement on the fracture resistance of endodontically treated teeth after fatigue loading. 40 teeth were divided into 4 groups: no ferrule-no post, no ferrule-post, 2mm ferrule-no post, 2mm ferrule-post. Teeth underwent fatigue loading and fracture testing. Results showed the highest fracture resistance in the 2mm ferrule-no post group, followed by the 2mm ferrule-post group. Only teeth with a ferrule restored without a post did not experience non-repairable root fractures. The study concludes that a 2mm ferrule can improve fracture resistance as much as adding
Rationale of post endodontic restoration /certified fixed orthodontic cours...Indian dental academy
Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable.
Rehabilitation of endodontically treated teeth : Post & CoreNaveed AnJum
These days we often come across mutilated or badly broken teeth in our practice. However various factors are involved for a better prognosis of such a teeth. This presentation mainly focuses on post and core treatment of such a teeth.
Restoration of endodontically treated teethLama K Banna
The document discusses pre-treatment evaluation and restoration options for root canal treated teeth. It covers evaluating the endodontic treatment, periodontal health, biomechanics, and esthetics. Restoration options depend on remaining tooth structure and are classified into 5 classes. Post selection considers root length, diameter, canal configuration and coronal structure. Custom posts can be made directly or indirectly from various materials to best suit each case.
Restoration of endodontically treated teethAnish Amin
Restoration of endodontically treated teeth often requires posts and cores to provide adequate retention and resistance for weakened teeth. Key principles for posts and cores include preserving tooth structure, maximizing retention through post length and design, and providing resistance through features like ferrules. Posts and cores are indicated when there is significant loss of coronal tooth structure and the risk of fracture is high. The amount of remaining tooth structure, presence of a ferrule, and post length and design all influence the success of a post and core restoration.
This document discusses post and core procedures for endodontically treated teeth. It covers objectives, indications, considerations for post length, diameter and design. Ideal post length is 1-2 mm shorter than the root and diameter should allow at least 1 mm of dentin surrounding the post. A ferrule is important to improve structural integrity. Post types discussed include custom cast metal posts, prefabricated metal posts like stainless steel and titanium, and non-metal options like carbon fiber, fiber-reinforced and zirconia posts. Fiber posts are more esthetic and flexible but have less strength than metal or zirconia posts. Proper diagnosis and treatment planning is required to select the best post and core for
Root canal treated teeth are more prone to fracture due to changes that occur during treatment like loss of tooth structure and changes to dentin collagen fibers. Posts are often used to restore these teeth and can be classified by their retention, composition, or shape. Fiber posts made of materials like carbon, silica or glass fibers have properties similar to dentin and improve stress distribution compared to metal posts. Bonding fiber posts requires an adhesive system and resin cement, but the root canal environment poses challenges to achieving optimal bonding due to factors like the dentin substrate, smear layer, chemicals used in treatment, and limited light penetration. Careful cleaning, selection of sealers, and final irrigation can help improve bond strength.
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
This document discusses post-retained endodontic restorations. It begins by explaining that posts are used to retain coronal restorations when there is significant tooth structure loss after endodontic treatment. The post must be firmly fixed in the root to withstand loads without fracturing. There are four parts to a post-retained restoration: residual tooth structure, dowel/post, core material, and coronal restoration. The document then discusses considerations for using posts in different types of teeth, types of posts, materials used for posts, and principles for achieving success with post-retained restorations.
Titanium and its alloys are commonly used for dental implants due to their biocompatibility and ability to osseointegrate with bone. Dental implants come in various shapes and types, including endosseous implants which are screwed or pressed into the jawbone, transosseous implants which transverse the mandible, and subperiosteal implants which rest on top of the jawbone. Successful osseointegration of dental implants depends on factors like material biocompatibility, implant surface properties, bone quality, surgical technique, and proper post-operative healing.
Restoration of endodontically treated teeth 1 /certified fixed orthodontic c...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 considerations for fixed prosthodontics in patients with compromised periodontal health. Key points include:
- Periodontal health plays an important role in the longevity of restorations, and defective prostheses can contribute to periodontal disease progression. Successful treatment requires cooperation between periodontists and prosthodontists.
- Periodontal issues must be resolved before restorative treatment to avoid tensions on the periodontium from tooth movement. Supragingival margins and open embrasures are preferred for periodontal health.
- Temporary splinting can help determine the prognosis of a permanent restoration in periodontally compromised patients. Occlusion should not interfere with plaque control.
This document discusses the restoration of endodontically treated teeth. It begins by outlining the changes that occur to teeth after endodontic treatment, including loss of tooth structure and changes to physical and esthetic characteristics. It then discusses general considerations for restoring such teeth, including risks of fracture or reinfection. Various factors for treatment planning are outlined, including remaining tooth structure, position, function, and esthetics. Types of posts are described, including active vs. passive posts and various materials. Key principles for posts involving retention, resistance, length, preservation of tooth structure, and the ferrule effect are explained.
Restoration of endodontically treated teeth.Anish Amin
provides an overview of restoring endodontically treated teeth using posts and cores. It discusses the historical background of posts and describes characteristics of teeth that have undergone endodontic treatment. Key points include that these teeth often have reduced strength and require special considerations for retention and resistance. The document outlines indications for posts and cores, principles of preservation of tooth structure and providing retention and resistance. It also describes methodologies for various steps of the post and core procedure.
This document summarizes research on the success rates and complications of resin bonded prostheses (RBPs). It finds that on average, 26% of RBPs experience complications within 4 years, increasing to 28% after 5 years, with debonding being the most common at 21%. Debonding rates are higher for posterior teeth, longer spans, and cantilever designs. Tooth preparation techniques like covering lingual and proximal surfaces, adding proximal grooves or pinholes, and occlusal rests can reduce debonding. Maintaining a minimum of 0.5mm occlusal clearance and 1mm metal thickness also impacts success. Proper diagnosis, treatment planning and cementation techniques are keys to optimizing longevity
RCT fixed expert 23-24pptx.pdf second partEl Sayed Omar
The document discusses several factors that are important for restoring endodontically treated teeth, including the need for full coverage restorations, use of posts, and biologic width considerations. It notes that adequate coronal restoration is equally as important as endodontic treatment. Factors like tooth type, structure loss, and occlusal stresses determine need for full coverage restorations. Post length, diameter, and ferrule effect are important principles for restoring teeth with posts. Techniques for managing severely damaged teeth like crown lengthening and orthodontic extrusion are also covered.
The document provides an introduction to dental implants, discussing why they are used to maintain bone volume, preserve adjacent teeth, and provide a natural emergence profile. It describes the different types of implants including root form, blade, and ramus frame implants and explains the process of osseointegration. The document also covers implant abutment connections, surface treatments, and relative and absolute contraindications for dental implants.
This study evaluated the efficacy of using periotomes for single-rooted nonsurgical tooth extractions compared to traditional extraction techniques. 100 patients were randomly assigned to have a tooth extracted using either a periotome (test group) or traditional methods using forceps (control group). The results found that extractions using periotomes took less time, resulted in less post-extraction pain reported by patients on a visual analogue scale over 7 days, required less analgesic consumption, and caused fewer gingival lacerations compared to traditional methods. The study concluded that the use of periotomes can help reduce post-extraction discomfort compared to conventional extraction techniques.
This presentation includes brief history, classification and definition of overdentures and explains in details about the various tooth supported overdentures. It explains about bar attachments, ball attachments, telecsopic dentures etc.
UNIQUE^J COST-EFFECTIVE AND RETENTIVE REMOVABLE PROSTHESIS.pptxMugilarasanMunisamy
This case report describes the rehabilitation of a Kennedy Class I partially edentulous maxilla with a custom attachment retained removable prosthesis. A 58-year-old male patient presented with multiple missing upper teeth. A customized attachment system using die pins and sleeves was used to retain a maxillary removable partial denture, improving retention over a conventional clasp-retained prosthesis. This provided an affordable, effective treatment that protected the periodontal health of the abutment teeth compared to alternative fixed or implant-supported options. Periodic recalls were recommended to maintain function and abutment health long-term.
Crowns significantly improve the success of endodontically treated posterior teeth. Posts are primarily used to retain cores and do not strengthen teeth. The appropriate post length is to extend to the radiographic apex with 5mm of gutta percha retained. Post diameter should not exceed 1/3 of the root diameter and range from 0.6-1.2mm. A ferrule of at least 2mm is recommended to prevent root fracture.
The document discusses overdentures, which are removable partial or complete dentures that cover and rest on one or more remaining natural teeth, tooth roots, or dental implants. Key points include:
- Retaining natural teeth can preserve alveolar bone and periodontal receptors important for function.
- Abutment teeth are prepared with short copings or left uncovered, and attachments may be added to improve retention.
- Overdentures can improve retention, stability, support and proprioception compared to conventional dentures.
- Proper case selection and maintenance are important for long term success.
JOURNAL CLUB ON THE OUTCOME OF ORAL IMPLANTS PLACED IN BONE WITH LIMITED BU...Shilpa Shiv
This document summarizes a study that evaluated the outcomes of oral implants placed in bone with limited bucco-oral dimensions over a 3-year period. 100 implants were placed in 28 patients. The study found that the implants had a 100% survival rate over 3 years and that the marginal bone levels around the implants remained stable. The results indicate that implants can successfully be placed in sites with up to 4.5mm of bucco-oral bone width without the need for bone grafting, providing patients maintain good oral hygiene.
1. Both orthodontic and endodontic treatment may need to be considered when a patient presents with a need for both. Orthodontic treatment can both cause and help address pulp necrosis, so its effects on endodontic treatment need evaluation.
2. Factors like tooth movement type, force used, and treatment time impact pulp health, as do individual tooth factors. Orthodontics may help access teeth for endodontic treatment and later restoration.
3. With recent trauma, calcium hydroxide filling with delayed definitive root canal until after orthodontic treatment allows inflammation to subside. Coordinating orthodontic and endodontic treatment requires considering multiple interacting clinical factors.
Principles of tooth preparation /certified fixed orthodontic courses by In...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
Temporary anchorage devices in orthodonticsParag Deshmukh
The document discusses temporary anchorage devices (TADs) used in orthodontics, specifically mini-implants. It provides background on how TADs have improved orthodontic anchorage compared to traditional methods. The introduction describes how TADs solve limitations of extraoral anchorage devices and provide reliable anchorage. It then covers implant terminology, history, parts, types, indications, bone physiology, and clinical applications of TADs as absolute anchorage for various tooth movements.
A Novel Approach to Fracture Resistance Using Horizontal Posts after Endodont...Nadeem Aashiq
This case report describes a technique for reinforcing a tooth with horizontal fiberglass posts embedded in composite after endodontic therapy. A 40-year-old patient presented with pain in an upper right molar. After root canal treatment, two horizontal fiberglass posts were placed through holes drilled bucally and lingually and cemented with composite. At a 17-month follow-up the tooth remained asymptomatic and healed with the horizontal post restoration intact. A review found that horizontal posts can significantly increase fracture resistance compared to direct composite alone and result in more repairable fractures if failure occurs. The technique provides short-term reinforcement until a full-coverage restoration can be afforded.
POST ENDODONTIC RESTORATION(Dr SAICHARAN)MINDS MAHE
- Non-vital teeth require careful treatment planning and restoration to strengthen teeth and prevent fracture under stress.
- Key factors to consider include the amount of remaining tooth structure, the tooth's position and function, and esthetic needs. Teeth with little structure left require dowels, cores and crowns for reinforcement.
- Dowels provide retention for cores within root canals. Ideal dowels are retentive, protect remaining tooth structure and roots, and allow for strong bonding of cores and crowns.
- Cores build up coronal structure for crowns. Different materials include cast cores, amalgam, composite resin and glass ionomers, each with strengths and weaknesses for retention, bond strength
This journal club discusses a study evaluating the clinical outcomes of teeth prepared using the biologically oriented preparation technique (BOPT) over 4 years. BOPT involves eliminating the finish line and placing the prosthetic margin in the gingival sulcus. The study found that restorations placed with BOPT had a high survival rate of 96.5% with low rates of complications. Periodontal outcomes were good with little inflammation, minimal increases in probing depth, and low plaque. BOPT resulted in increased gingival thickness and marginal stability over time. The technique provides predictable results for fixed prostheses.
Crowns significantly improve the success of endodontically treated posterior teeth but do not improve the success of anterior teeth. Posterior teeth require crowns more often than anterior teeth due to greater cuspal deflection after root canal treatment. The main purpose of a post is to retain a core, not strengthen teeth. Posts should extend to retain 5mm of gutta percha and not exceed 7mm in molars. The diameter of posts should not exceed one-third of the root diameter and range between 0.6-1.2mm. A ferrule of at least 2mm helps prevent tooth fracture.
Design of a fixed Partial Denture (with Abutment Tooth Preparation)Taseef Hasan Farook
A simplified take on the steps to designing a Fixed partial denture. This presentation also includes an overview of abutment preparation, associated finishes and methods of impression taking prior to the designing of the prosthesis itself
It include proximal stripping, Diagnostic aids, advantages, disadvantages, periodontal consideration, procedure for proximal stripping. Expansion, extraction, Distalization in detail as method of gaining space, Extra-oral, Intra-oral method for gaining space. uprighting, derotation of posterior teeth. proclination of anterior teeth.
Determination of root canal working length /certified fixed orthodontic cours...Indian dental academy
Welcome to Indian Dental Academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable.
provisional restoration in fixed taif.pdfEl Sayed Omar
Provisional restorations are used temporarily between tooth preparation and the final restoration. They must provide pulp protection, maintain periodontal health, and have a good fit with proper contours and smooth surfaces. Materials for provisional restorations include polymethyl methacrylate (PMMA), polyethyl methacrylate, and microfilled composite. Provisionals can be made using custom indirect, direct, or indirect-direct techniques involving impressions, casts, and temporary crowns formed in the mouth or lab. Fiber-reinforced composites can provide longer-term interim restorations.
Luting agent and cementation processTaif.pdfEl Sayed Omar
The document discusses dental luting agents and cementation procedures. It describes the ideal properties of luting agents, including long working time, adherence to tooth and restoration materials, providing a good seal while being non-irritating and non-toxic. It also discusses different types of luting agents like zinc phosphate, polycarboxylate, glass ionomer, resin-modified glass ionomer and resin cements. It provides details on the composition, advantages and disadvantages of each type. Furthermore, it covers preparation of restorations and teeth, cement application techniques, and post-cementation instructions.
principles of tooth prep. ppt 20-21TAIF.pdfEl Sayed Omar
This document outlines principles of tooth preparation for fixed prosthodontics. It discusses shaping teeth to accommodate restorations, including modifications for badly destructed teeth. It covers preserving adjacent teeth and soft tissues, and factors that affect pulp vitality like caries and restorations. Guidelines are provided for ease of preparation, identification, and finishing of restorations. Margin designs and their effects on retention and resistance are described. Considerations for esthetics, occlusion, and preventing restoration problems through proper tooth preparation are also summarized.
The document discusses dental wax materials and their uses in prosthodontics. It describes different types of waxes like inlay wax and impression wax. The key steps in wax pattern construction are outlined, including adding wax, shaping proximal, axial and occlusal surfaces, and finishing margins. Factors to consider for occlusion like cusp height and schemes are presented. The document provides guidance on tools, techniques and evaluation of wax patterns.
The document discusses dental cements and luting agents. It describes the ideal properties of luting agents, including long working time, good adhesion, sealing ability, biocompatibility, and adequate mechanical properties. It then discusses different types of cements like zinc phosphate, polycarboxylate, glass ionomer, resin-modified glass ionomer, and resin cements. It provides details on the composition, advantages, and disadvantages of each cement type. It emphasizes that the type of cement used depends on factors like the restoration being cemented and tooth morphology. The document also outlines best practices for surface preparation and cementation procedures.
This document discusses metal-ceramic restorations, including their historical context and design considerations. It outlines the appropriate material selection and fabrication process for metal frameworks, including ensuring compatibility between the metal and ceramic materials to achieve a strong bond. Proper framework design is emphasized to avoid mechanical failures and optimize esthetics. The document describes different porcelain layering techniques and potential modes of failure for metal-ceramic restorations. Collarless crowns and various methods for fabricating porcelain labial margins are also covered.
1. The document discusses considerations for restoring endodontically treated teeth including tooth type, remaining tooth structure, and need for post placement.
2. Key factors for post placement include adequate canal enlargement, post length equal to crown height or 2/3 root length, and post diameter less than 1/3 root width.
3. Both custom-made and prefabricated posts have advantages and disadvantages for retention and resistance form. Fiber posts provide properties similar to dentin to reduce stress.
Cement retained crowns have advantages for esthetics but require antirotational features and minor angle corrections can be made. Screw retained restorations offer more versatility in angulation but may be less esthetic.
Osteoporosis - Definition , Evaluation and Management .pdfJim Jacob Roy
Osteoporosis is an increasing cause of morbidity among the elderly.
In this document , a brief outline of osteoporosis is given , including the risk factors of osteoporosis fractures , the indications for testing bone mineral density and the management of osteoporosis
Basavarajeeyam is a Sreshta Sangraha grantha (Compiled book ), written by Neelkanta kotturu Basavaraja Virachita. It contains 25 Prakaranas, First 24 Chapters related to Rogas& 25th to Rasadravyas.
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These lecture slides, by Dr Sidra Arshad, offer a quick overview of the physiological basis of a normal electrocardiogram.
Learning objectives:
1. Define an electrocardiogram (ECG) and electrocardiography
2. Describe how dipoles generated by the heart produce the waveforms of the ECG
3. Describe the components of a normal electrocardiogram of a typical bipolar lead (limb II)
4. Differentiate between intervals and segments
5. Enlist some common indications for obtaining an ECG
6. Describe the flow of current around the heart during the cardiac cycle
7. Discuss the placement and polarity of the leads of electrocardiograph
8. Describe the normal electrocardiograms recorded from the limb leads and explain the physiological basis of the different records that are obtained
9. Define mean electrical vector (axis) of the heart and give the normal range
10. Define the mean QRS vector
11. Describe the axes of leads (hexagonal reference system)
12. Comprehend the vectorial analysis of the normal ECG
13. Determine the mean electrical axis of the ventricular QRS and appreciate the mean axis deviation
14. Explain the concepts of current of injury, J point, and their significance
Study Resources:
1. Chapter 11, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 9, Human Physiology - From Cells to Systems, Lauralee Sherwood, 9th edition
3. Chapter 29, Ganong’s Review of Medical Physiology, 26th edition
4. Electrocardiogram, StatPearls - https://www.ncbi.nlm.nih.gov/books/NBK549803/
5. ECG in Medical Practice by ABM Abdullah, 4th edition
6. Chapter 3, Cardiology Explained, https://www.ncbi.nlm.nih.gov/books/NBK2214/
7. ECG Basics, http://www.nataliescasebook.com/tag/e-c-g-basics
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Rasamanikya is a excellent preparation in the field of Rasashastra, it is used in various Kushtha Roga, Shwasa, Vicharchika, Bhagandara, Vatarakta, and Phiranga Roga. In this article Preparation& Comparative analytical profile for both Formulationon i.e Rasamanikya prepared by Kushmanda swarasa & Churnodhaka Shodita Haratala. The study aims to provide insights into the comparative efficacy and analytical aspects of these formulations for enhanced therapeutic outcomes.
Promoting Wellbeing - Applied Social Psychology - Psychology SuperNotesPsychoTech Services
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
TEST BANK For Basic and Clinical Pharmacology, 14th Edition by Bertram G. Kat...rightmanforbloodline
TEST BANK For Basic and Clinical Pharmacology, 14th Edition by Bertram G. Katzung, Verified Chapters 1 - 66, Complete Newest Version.
TEST BANK For Basic and Clinical Pharmacology, 14th Edition by Bertram G. Katzung, Verified Chapters 1 - 66, Complete Newest Version.
TEST BANK For Basic and Clinical Pharmacology, 14th Edition by Bertram G. Katzung, Verified Chapters 1 - 66, Complete Newest Version.
TEST BANK For Basic and Clinical Pharmacology, 14th Edition by Bertram G. Katzung, Verified Chapters 1 - 66, Complete Newest Version.
4. •The endodontic and restorative plans should be
considered jointly before treatment is carried out.
•The successful outcome of healing and function,
ultimately, depends upon maintaining the coronal
and apical seal of the endodontically treated tooth.
•The importance of coronal restoration after
endodontic treatment.
5. How Does the Coronal Restoration
Impact the Success of Endodontic
Treatment?
6. •It is generally accepted that a favourable outcome
of endodontic treatment relates to the technical
quality of the canal disinfection and long-term seal
of the obturating material.
•Although an adequate coronal seal may be
provided by a well-obturated root canal system,
over time an inadequate coronal restoration may
allow for the ingress of microbes and contribute to
the recontamination and ultimate failure of the
endodontic and restorative treatment.
7. Which is more important; an adequate
endodontic treatment or an adequate
coronal restoration? Could they be equally
important?
8. • Ray and Trope (1995) presented a thought-provoking finding,
in that the effect of the restoration on the radiographic success
was statistically greater than the effect of a good endodontic
filling.
• Tronstad et al. ( 2000 ) raised the counterpoint, stating that
the quality of the root canal filling was the most important
factor for the outcome of endodontic treatment.
• In a systematic review published by Gillen et al. ( 2011 ), the
impact of the quality of coronal restoration and the quality of
root canal fillings on success of root canal treatment were
considered. Poorer clinical outcomes may be expected
with adequate root filling-inadequate coronal restoration
and inadequate root filing-adequate coronal restoration.
9. Is there an expected rate of unfavourable
outcome associated With prosthodontic
failure?
10. • Vire(1991)evaluated and classified failures of endodontically
treated teeth according to
• Prosthodontic
• Periodontic
• Endodontic
• Teeth that had been crowned had a greater longevity (87
months) than uncrowned teeth (50 months) of the 116
endodontically treated teeth, of 59.4 % were prosthetic
failures, primarily due to crown fracture.
11. When and Why Do Endodontically
Treated Teeth Require Full
Coverage?
12. The need for a full-coverage restoration after
endodontic therapy is largely determined by:
• Tooth type
• Amount of tooth structure loss
• The amount of occlusal stress on the tooth.
13. Anterior Teeth
•Not always need complete coverage by placing a
complete crown
•Extensive loss of coronal tooth structure or tooth will
be serving as an FPD or RPD abutment crown or post
&crown
14. Posterior Teeth
•Subject to greater loading of cusps can be wedged
apart (Cuspal deflection)
•This type of Cuspal deflection creates stress within
the tooth and can lead to catastrophic coronal
fractures
•Complete coverage is recommended on teeth with
high risk of fracture
15.
16. Quantifying Tooth Loss Peroz et al. ( 2005 ).
• Based on the number of remaining axial walls:
• Class I 4 walls present ( occlusal cavity )
• Class II mesio-occlusal (MO) or disto-occlusal (DO) cavity in
which one cavity wall is missing
• Class III MOD cavity with two remaining axial walls.
• Class IV category, a single axial wall either buccal or lingual
remains
• Class V crownless tooth with no remaining axial walls
17.
18.
19.
20. • According to Peroz et al. ( 2005 ), if Class I, II, and III
cavity walls have thicknesses greater than 1.0 mm and
axial heights of at least 2.0 mm, then a post is not
recommended.
• When only one cavity wall remains in anterior teeth, it
is recommended to use fiber posts with all-ceramic
crowns; both metal and non-metal posts are acceptable
options for posterior teeth.
21.
22. Tilk et al 1979 demonstrated that teeth with and without
posts had the same longevity outcome,
Raiden et al 1999 determined that teeth with posts
exhibited significantly more apical periodontitis than teeth
without posts.
Results from a study indicated that the preparation and
placement of a post can actually compromise the apical
endodontic seal.
23. Disadvantages to the Routine Use of a Cemented Post
•Placing the post requires an additional operative
procedure.
•Preparing a tooth to accommodate the post entails
removal of additional tooth structure.
•The post can complicate or preclude future
endodontic re-treatment that may be necessary.
24. Clinical Complications of Post and Core Restorations
• Post loosening
• Influence of post form
• Influence of post length
• Root fracture and Root perforation
• Influence of threaded posts
• Influence of post length
• Influence of residual dentin thickness
• Influence of instrument diameter
27. • Several factors affect the outcome when
endodontically treated teeth are restored.
➢ Post Length
➢ Post Diameter
➢ Canal Preparation
➢ Ferrule Effect
➢ Anatomical and Structural Limitations
28. Post Length
• The appropriate length for a post should be based on
its potential to minimize damage to the tooth,
optimize post retention, and maintain an appropriate
apical seal for the root canal filling.
• Recommendations have been made regarding post Length,
including the following:
1. Post length should equal the incisocervical or occlusocervical
dimension of the crown
2. Post should be longer than the crown
3. Post should be one and one-third times the crown length
4. Post should be one-half the root length
29. Several studies have demonstrated that short posts are
associated with higher root stresses and greater tendency
for root fracture to occur
30. Post Diameter
• Several studies have demonstrated that an increase in
post diameter does not increase post retention
• Increase in post diameter necessitates removal of
unnecessary tooth structure decreasing resistance to
fracture
• Deutsch et al determined that, when large diameter
posts (1.5 mm or more) were placed, root fracture
increased six fold for every millimetre of decreased root
diameter
• Increase in post diameter increases internal stresses
within the tooth
31.
32. • post diameter not exceed one-third the root diameter
• To ensure that posts do not exceed one-third the root
diameter, the post diameter should be between 0.6 and
1.2 mm, depending on the tooth
• Preserve at least 1.0 mm of root wall thickness following
post preparation
33. Guidelines for pulp chamber preparation
• Prefabricated post ; morphologic undercuts present in
the pulp chamber should be retained for core retention
• Custom cast post and core; pulp chamber undercuts
should be blocked out with a definitive cement or
restorative material that is bonded to the tooth, or the
undercut should be eliminated by removal of tooth
structure
34. Guidelines for root canal preparation
• Successful use of rotary instruments is related to initial
use of a small-diameter instrument
• Confirm the amount of gutta-percha removed with a
radiograph and the use of a periodontal probe.
• After the length is established, any required increases to
the post diameter are accomplished incrementally with
larger rotary instruments or hand files.
35. Immediate versus delayed removal of gutta-percha and
post space preparation
• Several studies have indicated that there is no difference
in the leakage of the root canal filling material when the
post space is prepared immediately after completion of
endodontic therapy
• Abramovitz et al compared immediate gutta-percha
removal with hot pluggers and delayed gutta-percha
removal (after 2 weeks) with Gates Glidden drills. They
found no difference between the two methods.
36. Instruments for removal of gutta-percha without
disturbing the apical seal
• Three methods:
• Chemical (oil of eucalyptus, oil of turpentine, and
chloroform), not utilized for specific reasons (resulting
microleakage and inability to control removal)
• Thermal (electric or heated instruments)
• Mechanical rotary instruments
37. Ferrule Effect
• When possible, maintenance of 1.5 to 2.0 mm of intact
tooth structure around the entire circumference of a
core creates an optimally effective crown ferrule.
• If the supragingival crown preparation results in a
margin that is partially or entirely seated on foundation
restorative material, the forces of occlusion may be
transmitted to the foundation restoration and in the case
of a post and core, between the internal aspect of the
root and the post.
38. • A Ferrule Performs Three
Additional Functions
• 1. Protects the post against
fracture
• 2. Minimizes post dislodgement
• 3. Protects the cement seal at
the margin of the crown
39.
40. • Gargiulo et al reported the average length of the
dentogingival junction to be 2.04 mm.
• They identified the subcomponents of the dentogingival
junction as the connective tissue attachment (1.07 mm) and
the epithelial attachment (0.97 mm).
• Ingber et al suggested that the term biologic width be used
to describe the average value of the dentogingival junction,
approximately 2 mm. They suggested that an additional 1
mm be added coronal to the 2-mm dentogingival junction as
an optimal distance between the bone crest and the
restorative margin
41. Components of the biologic width (~ 2.04 mm): EA epithelial attachment
(~ 1.00 mm); CTA connective tissue attachment (~ 1.00 mm). S sulcus (~
0.75 mm).
44. •Crown Lengthening
• Allowing longer clinical crowns and reestablishment of the
biologic width
• Crown lengthening surgery has been categorized as esthetic
or functional
45. Preprosthetic Orthodontic Tooth Eruption
These anatomical considerations exclude the
following situations from orthodontic tooth
eruption: posterior teeth where the furcation
would be exposed on tooth extrusion, and
teeth with moderate to severe bone loss from
periodontal disease where the procedure
would also compromise the optimal crown-root
ratio.
46. ■ Effect of apical preparation on crown-to-root ratio. A, Schematic of extensively damaged
premolar tooth. Apical extension of the gingival margin would encroach on the biologic width .This
preparation has no ferrule. C, crown length; R, root length. B, Creating a ferrule with orthodontic
extrusion reduces root length (R′), whereas crown length remains unchanged. C, Surgical crown
lengthening also reduces root length (R′) but increases crown length (C′). This results in a much
less favorable crown-to-root ratio, which may, in fact, weaken the restoration.
47. Supracrestal fiberotomy
Indicated when the bone is extruded with the tooth,
requiring its removal for two reasons: bone levelling with
the adjacent teeth and exposure of sufficient tooth
substance for crown restoration.
Fiberotomy. The surgical blade (blue) is inserted
to the depth of the gingival sulcus, through the
biologic width (BW), and severs all fibrous
attachments around the tooth, almost beyond the
supracrestal fibers (SF), to a depth of nearly 2 to 3
mm apical to the alveolar crest (dashed line).
(Adapted from Edwards7 with permission.)
48. Intra-alveolar Transplantation
a) Bone sounding of the root fragment.
b) Initial periapical radiograph.
c) Initial CBCT analysis of cross section
d) (d) Atraumatic extraction with a Power
tome.
(e) Arrested extraction.
(f) Interproximal interrupted sutures.
(g) Postoperative radiograph.
(h) Completed endodontic treatment at 5
weeks.
(i) Periapical radiograph at 13 weeks.
(j) Core build-up and tooth preparation.
(k) Anterior view of the tooth preparation.
(l) Occlusal view of the tooth preparation.
49.
50. •Gingival margins do not stabilize completely
until at least 5 months after surgery
•In areas of no esthetic concern, it is this
author’s opinion that restorative treatment
can be commenced after at least a 6- to 8-
week healing period without aberrant healing
issues.
51. Root curvature
Anatomical and Structural Limitations
Molar posts should not exceed 7 mm in length in the
primary roots because of the potential for perforation
due to root curvature
Fig 4-17 Given the curvature of the
distal canal, the post space should not
exceed 7 mm from the orifice of the
canal. (Courtesy of Dr Axel Yabroudi,
Phoenix, AZ.)
61. •The luting agent must fill all dead space within the
root canal system
•A rotary (lentulo) paste filler or cement tube is used to
fill the canal with cement
•Inserted gently to reduce hydrostatic pressure Voids
may be a cause of periodontal inflammation via lateral
canals.
62. If cement is placed only on the post, as it is seated (large arrow) the air trapped within
the post preparation travels through the liquid cement (small arrows), producing
multiple voids. (Reprinted from Morgano and Brackett3 with permission.)
66. Amalgam
➢ It has physical properties that are better than those of most
other core materials
➢ Relatively dimensionally stable (even in the presence of water),
and is easy to condense
➢ Resistance to leakage of amalgam improves with time because
of its corrosion products
➢ It is a relatively inexpensive material compared with composite
resin or glass ionomer
Disadvantages
lack of bonding to dentin, the poor color under an all-ceramic
crown, and the formation of amalgam tattoo during tooth
preparation. At initial setting, the strength of amalgam is
low.Hence, it cannot be prepared right away
Advantages
67.
68. Composite resin
Advantage
• Easy to use and satisfies esthetic demands
• More flexible than amalgam
• It adheres to tooth structure
• May be prepared and finished immediately
• Acceptable core material when substantial coronal
tooth structure remains
69. Disadvantage
• Poor choice when a significant amount of tooth structure is
missing
• Instability of the material in oral fluids (water sorption)
• Hygroscopic expansion of composite and cements can
generate significant stresses that have the potential to cause
extensive cracking in the overlying ceramic layer
• Shrinkage during polymerization causes stress on the
adhesive bond resulting in gap formation
70. Glass ionomer
• It adheres to tooth structure by forming a chemical bond
• Has a low thermal expansion coefficient
• Low polymerization shrinkage
• Has the ability to release fluoride
• Weakest core build up material when compared with
amalgam and composite resin.
• lack of adequate strength (flexural and tensile) along with
a sensitivity to moisture lower its resistance to fracture
• Used primarily to block minor undercuts in a tooth
preparation
73. Risks of Post Removal Procedures
•May cause cracks, vertical root fracture, or
perforation as a result of direct mechanical
action from the transfer of ultrasonic energy
74. Removal of Posts TECNIQUES
•Post removal devices divided into three different
categories:
• Mechanical post removal devices
• High-speed rotary instruments
•Ultrasonic devices.
75. Removal of Posts TECNIQUES
•Mechanical Devices:
• All mechanical post removal devices require some
degree of direct contact with the intraradicular post
and sufficient remaining tooth structure to provide
fulcrum to support the removal instrument.
• Most mechanical devices do have limited success in
removing threaded posts
• Threaded posts are best removed by grasping the
exposed and flattened head of the post and gently
turning it, usually in a counter clockwise direction