Classification of partially edentulous archesShady Negm
The document summarizes the Kennedy classification system for partially edentulous dental arches. The Kennedy system divides arches into four basic classes based on the location of edentulous areas. It aims to provide a simple and universally accepted way to classify and communicate about partial edentulism. The classification satisfies requirements to immediately visualize the arch type and differentiate between tooth-supported and tissue-supported removable partial dentures. Eight rules are also presented to guide application of the Kennedy classification.
Classification of partially edentulous archesShady Negm
The document summarizes the Kennedy classification system for partially edentulous dental arches. The Kennedy system divides arches into four basic classes based on the location of edentulous areas. It aims to provide a simple and universally accepted way to classify and communicate about partial edentulism. The classification satisfies requirements to immediately visualize the arch type and differentiate between tooth-supported and tissue-supported removable partial dentures. Eight rules are also presented to guide application of the Kennedy classification.
This document provides biographical information about the author and summarizes their experience and credentials. It then discusses their company EdgeEndo, which produces heat-treated nickel-titanium (NiTi) endodontic files. The document outlines the design and properties of their EdgeFile and EdgeEvolve file systems, explaining how the heat treatment and designs allow the files to be more flexible and resistant to fatigue failure compared to traditional NiTi files. Various file sizes and sequences for each system are presented.
This document describes various types of wire bending pliers used in orthodontics. It discusses pliers for bending light wires like standard light wire pliers and Jaraback light wire pliers. It also covers pliers for specific functions like Young's loop bending pliers, Adams pliers for fabricating Adams clasps, angle wire bending pliers, contouring pliers for shaping canines and arches, and turret pliers for bending archwires with different torque specifications. Loop forming pliers are also discussed, including Nance loop forming pliers and Tweed loop forming pliers.
1. Forces acting on removable partial dentures can cause the denture to move in various directions.
2. Key movements are tissue-ward, which are resisted through support from rests and a rigid major connector, and tissue-away, which are resisted through retention features like clasps and attachments.
3. Other movements include horizontal forces that can cause lateral or back-and-forth motion, resisted through bracing from clasps and connectors and ensuring balanced occlusion. Proper design of components is important to control stresses from forces on the denture.
This document discusses treatment options for Kennedy class IV partial dentures. For children, options include spoon dentures or modified spoon dentures. For adults, options are short or long span partial dentures, single implants, implant-supported fixed prostheses, fixed bridges, or removable partial dentures. The document focuses on details of spoon denture design and construction for children, as well as skeleton designs for class IV partial dentures that use posterior clasping systems for adults.
Post insertion complaints in complete denture patients
(Prosthodontics- Branch of Dental science)
The complaints presented by patients after complete denture (artificial tooth set) insertion.
Dr.Sachin Sunny Otta
St.Gregorios Dental College,Kothamangalam,Ernakulam
This document discusses the design of removable partial dentures (RPDs). It defines the differences between Class I/II and Class III RPDs, and describes the design sequence including placing rests, major connectors, minor connectors, and direct and indirect retainers. Color codes for design elements are also explained. The objective of RPD design is to control denture movement while preserving oral tissues. Proper design follows diagnostic information and mechanical principles.
An interim removable partial denture (RPD) addresses patients’ concerns regarding esthetics and function and helps them adjust to the edentulous condition until a more definitive form of treatment can be rendered.
This document discusses different types of partial dentures used to restore Kennedy Class III edentulous areas, including short and long saddle partial dentures. It describes unilateral removable partial dentures, bilateral partial dentures, implant-supported fixed prostheses, and fixed bridges as options. Bilateral partial dentures are preferred over unilateral designs as they provide better stability, retention, and load distribution. The document outlines design considerations for bilateral unmodified and modified Class III partial dentures, including denture base material, rests, clasps, and major connectors used. It also describes the design of "every dentures" which are mucosa-supported when abutment teeth have poor prognoses.
Structural durability /prosthodontic courses/prosthodontic coursesIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
1. Instrument breakage is caused by fatigue from repetitive compression and tension during rotation, and torsion when different parts of the file rotate at different rates.
2. The risk of instrument breakage increases with larger diameter, higher taper, greater curvature, longer time in canal, and more engagement of the file surface in the canal. No more than 6mm of a file should be engaged if in a curvature.
3. More efficient cutting instruments require less torque, pressure, and time to shape canals. Positive cutting angles are more efficient than negative angles. Instrument design, including cutting edges and lands, affects cutting ability and centering.
Selection and arrangement of artificial teeth for normal cases and modified cases that need special ways in teeth setting and the common errors in teeth setting that may be done by beginners and how to fix them
This document discusses various factors to consider in the design of removable partial dentures (RPDs). It covers 10 key factors: 1) biomechanical considerations and forces acting on RPDs, 2) controlling stress through design, 3) direct and indirect retention methods, 4) clasp design, 5) splinting, 6) the denture base, 7) major and minor connectors, 8) rests, 9) stress equalization techniques, and 10) philosophies of RPD design including broad stress distribution. The goal of proper RPD design is to preserve remaining teeth and restore function while minimizing stress on abutment teeth and soft tissues.
The document discusses post-core-crown restorations. It provides a historical background and summarizes key findings from studies on post length, diameter, form and failure rates. Threaded posts have the highest retention but also highest risk of root fracture. Parallel-sided posts have less retention but distribute stresses more evenly. At least 4mm of gutta-percha should remain at the apex. Post length is generally recommended to be 3/4 of the root length. Proper post diameter is 1/3 the root width or less.
Diagnosis and treatment planning in fixed partial denturesApurva Thampi
This gives an overview on the diagnostic and treatment planning procedures required in fixed partial dentures and also about the biomechanics involved in the selection of an appropriate fixed prosthesis.
The presentation can be available upon request. Mail me at apurvathampi@gmail.com
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Rotary endodontic instruments are used within root canals and follow rotational motion dynamics. They are replacing conventional hand files to improve canal shaping ability and reduce clinical errors. Nickel-titanium alloys are commonly used due to their ability to flexibly conform to canal curvatures without plastic deformation. Modern rotary instrument systems incorporate torque-controlled motors that can reverse rotation to prevent instrument separation if excessive torque is applied. Continued research aims to further optimize flexibility, strength and cutting ability of these instruments.
This document provides a summary of an editorial and articles from the CAD/CAM international magazine of digital dentistry. The editorial discusses the benefits of integrating chairside CAD/CAM dentistry and cone-beam CT technology into a dental practice. It allows dentists to provide same-day restorations and surgical guidance without outsourcing work. Upcoming software may combine intraoral scans and CBCT data to enable restorative-driven implant planning. Articles discuss CAD/CAM techniques for complex cases, CBCT applications, and industry news on digital dentistry events and products.
This document provides biographical information about the author and summarizes their experience and credentials. It then discusses their company EdgeEndo, which produces heat-treated nickel-titanium (NiTi) endodontic files. The document outlines the design and properties of their EdgeFile and EdgeEvolve file systems, explaining how the heat treatment and designs allow the files to be more flexible and resistant to fatigue failure compared to traditional NiTi files. Various file sizes and sequences for each system are presented.
This document describes various types of wire bending pliers used in orthodontics. It discusses pliers for bending light wires like standard light wire pliers and Jaraback light wire pliers. It also covers pliers for specific functions like Young's loop bending pliers, Adams pliers for fabricating Adams clasps, angle wire bending pliers, contouring pliers for shaping canines and arches, and turret pliers for bending archwires with different torque specifications. Loop forming pliers are also discussed, including Nance loop forming pliers and Tweed loop forming pliers.
1. Forces acting on removable partial dentures can cause the denture to move in various directions.
2. Key movements are tissue-ward, which are resisted through support from rests and a rigid major connector, and tissue-away, which are resisted through retention features like clasps and attachments.
3. Other movements include horizontal forces that can cause lateral or back-and-forth motion, resisted through bracing from clasps and connectors and ensuring balanced occlusion. Proper design of components is important to control stresses from forces on the denture.
This document discusses treatment options for Kennedy class IV partial dentures. For children, options include spoon dentures or modified spoon dentures. For adults, options are short or long span partial dentures, single implants, implant-supported fixed prostheses, fixed bridges, or removable partial dentures. The document focuses on details of spoon denture design and construction for children, as well as skeleton designs for class IV partial dentures that use posterior clasping systems for adults.
Post insertion complaints in complete denture patients
(Prosthodontics- Branch of Dental science)
The complaints presented by patients after complete denture (artificial tooth set) insertion.
Dr.Sachin Sunny Otta
St.Gregorios Dental College,Kothamangalam,Ernakulam
This document discusses the design of removable partial dentures (RPDs). It defines the differences between Class I/II and Class III RPDs, and describes the design sequence including placing rests, major connectors, minor connectors, and direct and indirect retainers. Color codes for design elements are also explained. The objective of RPD design is to control denture movement while preserving oral tissues. Proper design follows diagnostic information and mechanical principles.
An interim removable partial denture (RPD) addresses patients’ concerns regarding esthetics and function and helps them adjust to the edentulous condition until a more definitive form of treatment can be rendered.
This document discusses different types of partial dentures used to restore Kennedy Class III edentulous areas, including short and long saddle partial dentures. It describes unilateral removable partial dentures, bilateral partial dentures, implant-supported fixed prostheses, and fixed bridges as options. Bilateral partial dentures are preferred over unilateral designs as they provide better stability, retention, and load distribution. The document outlines design considerations for bilateral unmodified and modified Class III partial dentures, including denture base material, rests, clasps, and major connectors used. It also describes the design of "every dentures" which are mucosa-supported when abutment teeth have poor prognoses.
Structural durability /prosthodontic courses/prosthodontic coursesIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
1. Instrument breakage is caused by fatigue from repetitive compression and tension during rotation, and torsion when different parts of the file rotate at different rates.
2. The risk of instrument breakage increases with larger diameter, higher taper, greater curvature, longer time in canal, and more engagement of the file surface in the canal. No more than 6mm of a file should be engaged if in a curvature.
3. More efficient cutting instruments require less torque, pressure, and time to shape canals. Positive cutting angles are more efficient than negative angles. Instrument design, including cutting edges and lands, affects cutting ability and centering.
Selection and arrangement of artificial teeth for normal cases and modified cases that need special ways in teeth setting and the common errors in teeth setting that may be done by beginners and how to fix them
This document discusses various factors to consider in the design of removable partial dentures (RPDs). It covers 10 key factors: 1) biomechanical considerations and forces acting on RPDs, 2) controlling stress through design, 3) direct and indirect retention methods, 4) clasp design, 5) splinting, 6) the denture base, 7) major and minor connectors, 8) rests, 9) stress equalization techniques, and 10) philosophies of RPD design including broad stress distribution. The goal of proper RPD design is to preserve remaining teeth and restore function while minimizing stress on abutment teeth and soft tissues.
The document discusses post-core-crown restorations. It provides a historical background and summarizes key findings from studies on post length, diameter, form and failure rates. Threaded posts have the highest retention but also highest risk of root fracture. Parallel-sided posts have less retention but distribute stresses more evenly. At least 4mm of gutta-percha should remain at the apex. Post length is generally recommended to be 3/4 of the root length. Proper post diameter is 1/3 the root width or less.
Diagnosis and treatment planning in fixed partial denturesApurva Thampi
This gives an overview on the diagnostic and treatment planning procedures required in fixed partial dentures and also about the biomechanics involved in the selection of an appropriate fixed prosthesis.
The presentation can be available upon request. Mail me at apurvathampi@gmail.com
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Rotary endodontic instruments are used within root canals and follow rotational motion dynamics. They are replacing conventional hand files to improve canal shaping ability and reduce clinical errors. Nickel-titanium alloys are commonly used due to their ability to flexibly conform to canal curvatures without plastic deformation. Modern rotary instrument systems incorporate torque-controlled motors that can reverse rotation to prevent instrument separation if excessive torque is applied. Continued research aims to further optimize flexibility, strength and cutting ability of these instruments.
This document provides a summary of an editorial and articles from the CAD/CAM international magazine of digital dentistry. The editorial discusses the benefits of integrating chairside CAD/CAM dentistry and cone-beam CT technology into a dental practice. It allows dentists to provide same-day restorations and surgical guidance without outsourcing work. Upcoming software may combine intraoral scans and CBCT data to enable restorative-driven implant planning. Articles discuss CAD/CAM techniques for complex cases, CBCT applications, and industry news on digital dentistry events and products.
There are three basic phases of the digital workflow when designing and/or fabricating removable partial denture frameworks; data acquisition, designing (computer aided design (CAD)), and computer-aided manufacturing (CAM). The bulk of this presentation is dedicated to the design steps used in this workflow utilizing sample maxillary and mandibular casts
There are three basic phases of the digital workflow when designing and/or fabricating removable partial denture frameworks; data acquisition, designing (computer aided design (CAD)), and computer-aided manufacturing (CAM). The bulk of this presentation is dedicated to the design steps used in this workflow utilizing sample maxillary and mandibular casts
This document discusses prosthodontic procedures and complications in posterior quadrants. It covers topics such as exam and workup, selection of implants, platform switching, abutment selection, provisional restorations, and new technologies like shape memory sleeve abutments. Key points addressed include that no implant design has been proven superior for marginal bone loss, and custom abutments offer better control of margins and occlusal thickness than prefabricated abutments. New technologies aim to simplify procedures and improve retrievability of restorations.
This document discusses single tooth defects in the posterior quadrants and their restoration. It compares fixed dental prostheses to implants, noting that implants are generally preferred when adjacent teeth are healthy or nearly so. For endodontically treated teeth, a fixed restoration is preferred if sufficient tooth structure remains and occlusion and parafunction are minimal. Considerations for implant placement include anatomic factors, timing of placement, and prosthodontic issues like abutment selection and cement versus screw retention. The goal is to restore function while avoiding complications like fracture, overload, and peri-implantitis.
This document discusses implant biomechanics and treatment planning considerations for restoring posterior quadrants. It notes that implant restorations must be designed to avoid overload, as excessive loads can lead to bone loss and implant failure over time. Key factors discussed include implant number, length, alignment relative to curves of Spee and Wilson, and linear versus curvilinear configurations. Curvilinear arrangements are emphasized as withstanding more load than linear arrangements due to greater cross-arch stabilization. Case examples demonstrate successful long-term outcomes and failures where biomechanics were not adequately considered.
This document discusses the use of implants to supplement removable partial dentures (RPDs) in various clinical situations. Implants can be used to improve support, stability, and retention of RPDs when existing dentition is compromised. Common scenarios include using implants in extension base RPDs, with questionable implant anchorage or unfavorable configurations, to replace lost implants in key locations, replace a lost natural tooth abutment, or supplement insufficient existing dentition. Resilient attachments are often used to retain implant-assisted RPDs while avoiding implant overload. Complications can include peri-implantitis, loose abutments, and wear of attachments. Overlay RPDs are also discussed as an option to
This document discusses computer guided treatment planning and implant placement. It describes how computer guided planning allows visualization of potential implant sites in 3D and more precise placement compared to free-hand drilling. Fully guided surgery uses surgical templates to control position, angle, depth and diameter of osteotomies, while semi-guided surgery controls initial position and angle only, allowing more flexibility. Fully guided is used for edentulous patients, while semi-guided is preferred for partially edentulous patients where soft tissue manipulation or bone grafting may be needed.
This document discusses dental implants, specifically angled (tilted) implants used to restore edentulous maxillas. It describes several approaches for using tilted implants, including placing 4-6 implants with angled abutments to offset the implant angles, or using co-axis implants where angulation correction is subgingival. Tilted implants provide advantages like longer distal implants, improved primary stability, and eliminating the need for sinus augmentation. Studies show success rates above 90% for tilted implants.
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.
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 secondary impression materials used in fixed prosthodontics. It defines an impression as a negative reproduction of prepared teeth that provides information to fabricate a crown or fixed prosthesis. Impressions can be physical materials or digital scans. Physical impressions include reversible hydrocolloid, condensation silicone, polysulfide, polyether, and addition silicone. Custom trays are often used and are fabricated from autopolymerizing or light-cured resin. Ideal impressions accurately record all prepared surfaces and maintain dimensional stability until the laboratory casts are made.
This document discusses techniques for fluid control and tissue management during fixed prosthodontic impressions. It describes the need to displace gingiva to record tooth structure below the finish line. Various methods of fluid control are outlined, including retraction cords, suction, and isolite systems. Retraction cords should be moistened with hemostatic agents before gentle placement to displace tissue. The document recommends a two-cord technique using different diameter cords and additional hemostatic agents if needed to control bleeding and produce accurate impressions. Proper fluid management is essential for high quality fixed prosthodontic impressions.
This document provides an overview of ceramics used in fixed prosthodontics. It discusses various types of ceramics including glass ceramics, glass infiltrated mixtures, and polycrystalline ceramics. Examples mentioned include lithium disilicate, zirconia, and alumina. The document reviews clinical indications and uses of different ceramics, as well as case considerations, preparation designs, and causes of failure. An outline is provided of the topics to be covered in the presentation on ceramics in dental practice.
1) There are two main hardening mechanisms for dental cements - acid-base reactions and polymerization reactions. Common cements that use acid-base reactions include zinc phosphate, polycarboxylate, and glass ionomer cements. Resin cements use a polymerization reaction.
2) Zinc phosphate cement has a long history of success but lacks adhesion and fluoride release. Polycarboxylate cement bonds to tooth structure and has short mixing/working times. Glass ionomer cement releases fluoride and bonds to tooth structure.
3) Resin-modified glass ionomer cement combines the benefits of glass ionomer cement with the strength and handling of resin, providing good early strength and reduced moisture sensitivity.
1. Single tooth defects in the posterior quadrants can often be restored with either fixed dental prostheses or dental implants, depending on the clinical situation and anatomical factors.
2. Implant placement can be immediate, delayed, or staged depending on factors like infection, bone quality, and proximity to anatomical structures.
3. Site enhancement procedures may be needed to augment bone in order to place implants in ideal positions and ensure adequate bone volume.
This document discusses cement retention versus screw retention for dental implants. Both methods can be used if done properly. Cement retention is simpler but risks residual cement being left under gums, which can lead to peri-implantitis. Screw retention allows easy removal but requires access holes. Residual subgingival cement is the major problem, as it is difficult to fully remove and can cause inflammation and bone loss over time.
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
This document is a lecture on fixed partial denture (FPD) designs by Charles J. Goodacre from Loma Linda University School of Dentistry. The lecture discusses key considerations for FPD treatment planning including tooth stability, occlusal forces, abutment selection, and material choices. It provides examples of different FPD designs for single and multiple tooth replacements in the maxilla and mandible. Challenges with each case such as cantilevers, oral hygiene access, and risk of failure are evaluated. The goal is to create the best online programs of instruction in prosthodontics.
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.
This document discusses various dental cements and cementation procedures. It describes the compositions, characteristics, and mixing procedures of different cement types including provisional cements, zinc phosphate cement, polycarboxylate cement, glass ionomer cement, resin-modified glass ionomer cement, resin cement, and calcium aluminate cement. It also outlines various clinical procedures for cementation such as provisional crown removal, tooth preparation, crown placement, adjustment, and cement cleanup.
More from www.ffofr.org - Foundation for Oral Facial Rehabilitiation (20)
14. “I”杆固位体
设计原则
v 正确设计的I杆进入倒凹区 外形高点
0.25mm,但咬合面-切缘的尖端
终止于外形高点
v When designed in this way the
RPD will slide in out of place
with a smooth frictional
resistance
24. 圆环形卡环
v 一些患者的下颌第二磨牙
颊侧面区域的附着粘膜非
常少。
v 这种情况下,如果在倒凹
面使用I卡,将会时卡环 Courtesy Dr. E. King
接触颊部。当咬肌收缩时
会造成粘膜刺激。
v 在这种情况下适用C卡。
Courtesy Dr. E. King
Courtesy Dr. E. King