Parts of fixed partial denture

Fixed parial denture

1. Parts of fixed partial denture Presented by: Iqra Saman GI5592(Batch 2k14) Under the guidance of: Dr. Pankaj Kharade

2. CONTENTS DEFINITION OF FPD COMPONENTS OF FPD RETAINER- Classification -Criteria for Selection PONTIC - Ideal Requirements -Classification CONNECTOR- Types -Indication CONCLUSION

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)

4. components FPD has three elementary components, that are: Retainer Pontic Connector

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).

6. RETAINER

7. Classification 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

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 3/4 th crown, reverse 3/4 th crown, 4/5 th crown, 7/8 th crown, one half crown.

9. 3 . Conservative retainers: Require minimal tooth preparation Indicated for anterior teeth eg Resin bonded fixed partial dentures

10. B. Mechanism of Retention Extracoronal retainer: Retention from external surfaces of coronal part of abutment teeth. Eg Full and partial veneer crowns 2 . Intracoronal retainers: Retention from within the coronal tooth structure. Eg Inlays, Onlays

11. 3. Radicular retainers: Obtain retention from within the root of the abutment. Eg Posts

12. C . Materials Used All metal retainers: Possess good strength Commonly used with posterior abutments Minimal tooth preparation Metal ceramic retainers: Most commonly used, indicated in both anterior and posterior teeth Can either be facing or full coverage

13. 3. All ceramic retainers: Most aesthetic, need maximal tooth preparation Acrylic retainers: Used for temporary fixed partial dentures Have poor strength, color instability, inadequate wear resistance hence not used in definitive prosthesis

14. Criteria for selection of retainers 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

15. 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

16. 3. Asthetics 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.

17. 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.

18. PONtic

19. IDEAL REQUIREMENTS Restore function of replaced tooth Provide aesthetic and comfort Biologically acceptable Oral hygiene Preserve underlying ridge and mucosa Adequate strength

20. classification I. Mucosal contact- With mucosal contact -Ridge lap or saddle pontic -Modified ridge lap -Ovate pontic -Conical pontic -Without Mucosal Contact -Sanitary/Hygienic pontic -Modified sanitary/ Perel

21. 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

22. Ridge lap/ saddle pontic Indication Contraindication Advantages Disadvantages High aesthetics demands Patients with poor oral hygiene maintenance Periodontal problems Aesthetically superior Gingival surface inaccessible thus difficult to clean Pontic must be highly polished

23. Modified ridge lap Pontic Indication contraindication Advantage Disadvantage Anterior teeth Premolars Maxillary molars Poor oral hygiene Mandibular molars Good aesthetics Lingual surface is convex and does not contact gingival tissue- hygiene Oral hygiene inferior when compared to sanitary Pontic

24. Ovate pontic Indication Contraindication Advantage Disadvantage Fresh extraction sockets Anterior teeth Flat broad ridges Posterior teeth Most aesthetically appealing Least food entrapment Easy to clean Just after extraction Surgical preparation required

25. Conical pontic Indication Contraindication Advantage Disadvantage Posterior teeth Broad residual edentulous ridge Aesthetic zone Ideal oral hygiene Compromised aesthetics

26. Sanitary/ hygienic pontic Indication Contraindication Advantages Disadvantages Non- aesthetic zone Ease of maintenance Appearance zone Less vertical dimension Good accessibility for oral hygeine Poor aesthetics

27. Modified sanitary pontic Indication Contraindication Advantage Disadvantage Posterior teeth Appearance zone Mesio -distal concavity Easy cleansing Added strength to connectors Compromised aesthetics

28. connectors

29. Types of connectors

30. 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.

31. CAST CONNECTOR LOOP CONNECTOR

32. 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)

33. Pier abutments

34. 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.

35. THANK YOU!