COMPONENTS OF FIXED PARTIAL DENTURE
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The document discusses the components of fixed partial dentures (FPD) including retainers, pontics, and connectors, along with their classifications and selection criteria. It emphasizes the importance of designing FPD components to ensure function, aesthetics, and preservation of tooth structure. A thorough examination is necessary to determine the appropriate type of prosthesis for a favorable long-term outcome.
COMPONENTS OF FIXED PARTIAL DENTURE
- 1. COMPONENTS OF FIXED PARTIAL DENTURE DR. ARATI DEPT. OF PROSTHODONTICS,CROWN & BRIDGE AND IMPLANTOLOGY 1 S B Patil Dental College And Hospital
- 2. CONTENTS • DEFINITION OF FPD • COMPONENTS OF FPD 1.RETAINER - Classification -Criteria for Selection 2. PONTIC - Ideal Requirements -Classification 3. CONNECTOR -Types -Indication • CONCLUSION 2 S B Patil Dental College And Hospital
- 3. DEFINITION • The branch of Prosthodontics concerned with the replacement and/or restoration of teeth by artificial substitutes that are not readily removed from the mouth. (GPT8) 3 S B Patil Dental College And Hospital
- 4. COMPONENTS • FPD has three elementary components, that are: 1. Retainer 2. Pontic 3. Connector 4 S B Patil Dental College And Hospital
- 5. • Retainer: The part of a fixed dental prosthesis that unites the abutment(s) to the remainder of the restoration. (GPT8) • Pontic: An artificial tooth on a fixed dental prosthesis that replaces a missing natural tooth, restores its function, and usually fills the space previously occupied by the clinical crown. • Connector: The portion of a fixed dental prosthesis that unites the retainer(s) and pontic(s). 5 S B Patil Dental College And Hospital
- 6. RETAINER 6 S B Patil Dental College And Hospital
- 7. CLASSIFICATION • A. Amount of tooth coverage 1. Complete coverage or full veneer retainers: • Cover all surfaces of abutment teeth • Provide maximum retention • Most commonly used • Used in extensively damaged abutment teeth 7 S B Patil Dental College And Hospital
- 8. 2. Partial coverage or partial veneer retainers: • Do not involve all the surfaces of abutment • Require less tooth preparation, less retentive but superior aesthetics • Termed as 3/4th crown, reverse 3/4th crown, 4/5th crown, 7/8th crown, one half crown. 8 S B Patil Dental College And Hospital
- 9. 3. Conservative retainers: • Require minimal tooth preparation • Indicated for anterior teeth e.g. Resin bonded fixed partial dentures 9 S B Patil Dental College And Hospital
- 10. • B. Mechanism of Retention 1. Extracoronal retainer: • Retention from external surfaces of coronal part of abutment teeth. • E.g. Full and partial veneer crowns 2. Intracoronal retainers: • Retention from within the coronal tooth structure. • E.g. Inlays, Onlays 3. Radicular retainers: • Obtain retention from within the root of the abutment. • E.g. Posts 10 S B Patil Dental College And Hospital
- 11. C. Materials Used 1. All metal retainers: • Possess good strength • Commonly used with posterior abutments • Minimal tooth preparation 2. Metal ceramic retainers: • Most commonly used, indicated in both anterior and posterior teeth • Can either be facing or full coverage 11 S B Patil Dental College And Hospital
- 12. 3. All ceramic retainers: • Most aesthetic, need maximal tooth preparation 4. Acrylic retainers: • Used for temporary fixed partial dentures • Have poor strength, color instability, inadequate wear resistance hence not used in definitive prosthesis 12 S B Patil Dental College And Hospital
- 13. Criteria for selection of retainers 1. Abutment Angulation • If abutments are parallel to each other: a full veneer retainer can be planned • If abutments are non parallel: a partial veneer retainer along with another partial or full veneer retainer can be used to get a single path of insertion 13 S B Patil Dental College And Hospital
- 14. 2. Condition of the Abutment • Good health- partial veneer treatment option • Endodontically treated or extensively damaged- full veneer retainer recommended • Periodontically weak- conservative resin bonded retainers indicated 3. Aesthetics • Type of pontic • In case of inadequate pontic space, a full veneer retainer can help better in managing the space to get better aesthetics. 4. Retention • Molars and premolars exert more force- requires more retention. • More coverage- more retention- more life span. 5.Cost • Full veneer all ceramic retainers are more expensive. 14 S B Patil Dental College And Hospital
- 15. 6. Preservation of Tooth structure. • Partial veneer preparations more conservative. • The buccal/facial surface should be preserved for natural aesthetics. • Choice should be depending upon all the factors so that the longevity of the prosthesis is no compromised. 15 S B Patil Dental College And Hospital
- 16. PONTIC 16 S B Patil Dental College And Hospital
- 17. IDEAL REQUIREMENTS 1. Restore function of replaced tooth 2. Provide aesthetic and comfort 3. Biologically acceptable 4. Oral hygiene 5. Preserve underlying ridge and mucosa 6. Adequate strength 17 S B Patil Dental College And Hospital
- 18. CLASSIFICATION I. Mucosal contact 1.With mucosal contact -Ridge lap or saddle pontic -Modified ridge lap -Ovate pontic -Conical pontic 2.Without Mucosal Contact -Sanitary/Hygienic pontic -Modified sanitary/ Perel II. Materials Used - All Metal Pontic -All Ceramic Pontic -Metal-Ceramic Pontic -Metal with resin facing Pontic -Fibre reinforced Composite Pontic III. Method Of Fabrication -Custom made Pontics -Prefabricated Pontic 18 S B Patil Dental College And Hospital
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- 25. CONNECTORS 25 S B Patil Dental College And Hospital
- 26. TYPES OF CONNECTORS • Cast connectors • Soldered connectors • Loop connectors RIGID CONNECTORS • Tenon-mortise connectors • Split Pontic connectors • Cross wing and wing connectors NON-RIGID CONNECTORS 26 S B Patil Dental College And Hospital
- 27. RIGID CONNECTORS • These connectors do not provide any movement. • Indicted when all the masticatory force is to be transferred to abutments. • Can be directly cast as a part of multiunit FPD or different units can be soldered together. • Size- Large enough to prevent distortion or fracture during function. Too large is un-aesthetic and difficult for plaque control. • Tissue surface is curved facio-lingually for efficient cleansing. 27 S B Patil Dental College And Hospital
- 28. CAST CONNECTOR LOOP CONNECTOR 28 S B Patil Dental College And Hospital
- 29. NON-RIGID CONNECTORS • Allow limited movement between retainer and Pontic. • Have limited amount of flexibility. • Indications- when parallel wall of insertion cannot be achieved. - Pier abutment - Periodontically weak abutments to reduce stress. (Stress breaker) 29 S B Patil Dental College And Hospital
- 30. PIER ABUTMENTS 30 S B Patil Dental College And Hospital
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- 32. CONCLUSION Components of FPD need to be designed in harmony with all the principles and fulfilling all the requirements of each part. After a thorough examination, the type of prosthesis is determined such that it has a long term favourable prognosis. 32 S B Patil Dental College And Hospital
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