Interocclusal record Fixed prosthodontic Dentistry Fourth year Al Azhar University Gaza Dr. Mohammed Miqdad crown and bridge department

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.

6. Occlusal Wear:

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.