Repair of fixed partial denture
Download as PPT, PDF6 likes1,912 views
This document outlines procedures for repairing crown and bridge restorations, specifically addressing issues like fractured porcelain veneers, solder joint failures, and occlusal wear. It details step-by-step repair methods for various scenarios, including in-situ repairs and those requiring outside adjustments. Additionally, it discusses when it may be necessary to remake restorations due to design flaws or structural issues.
Repair of fixed partial denture
- 1. FIXED PROSTHODONTIC III Crown and Bridge Department
- 2. REPAIR OF CROWN AND BRIDGE RESTORATIONS
- 3. Fractured Porcelain Veneer: Usually it is related to faults in framework design, improper laboratory procedures, excessive occlusal function, or trauma. To save the patient additional discomfort, time, and expense, an attempt to repair rather than a remake may be justified.
- 4. Fractured Porcelain Veneer: The repair in this case depends mainly on the site of fracture. Step-by-step procedure: 1-Select the proper shade of composite resin material. 2-Clean the chipped part with water spray and then dry it with air. 3-One or more layers of silane coupling agent are applied to the surface and are light cured. 4-Composite resin is then applied and is carved then light activated until curing completed.
- 5. Failure of Solder Joint: Step-by-step procedure: 1-Remove the cemented prosthesis. 2-Clean both the abutment and the prosthesis from the remaining adhesive cement. 3-The prosthesis is replaced over the abutments and is checked for proper seating. 4-A plaster impression is made with the prosthesis in place, and then resoldering process is completed.
- 7. Discolored Veneering Material: The facing can be repaired be removing all the acrylic resin and establishing mechanical means of retention (undercuts) in the underlying metal substructure. The field is then cleaned and dried, bonding material is applied, then proper shade of composite resin is appropriately carved and then light cured.
- 8. Overextending Margin: Overextended margin of a restoration leads to gingival irritation, thus, restoration should be removed, impression is made and a new cast is obtained, then the restoration is adjusted in the new cast and recemented.
- 9. Summary: Repairing the restoration inside the patient’s mouth to: -Change the acrylic facing color. -Restore chipped ceramic portion. -Restore a perforation in the occlusal table either precious or non precious.
- 10. Repairing the restoration outside the patient’s mouth to: -Correct over or under contoured pontic -Correct overextended margin. -Repair fractured solder joint. -Repair perforated restoration with solder alloy
- 11. Remaking the restoration: -The need to change the bridge design. -Losseness of abutments. -Fractured ceramic core. -Cervical decay related to the crown margins.