Retrieval of Cement-Retained Implant Bridge: a Case Report

Background: One of the largest disadvantages of cement-retained restorations on implants is retrievability. Case Report: In this case report a simple, novel approach for locating the screw hole of the abutment and then unscrewing both the abutment and the cement-retained bridge as one unit is described. The position of the screw hole was identified by using acrylic resin index with impression post on the patient's cast. The impression post was removed, and the acrylic resin index was transferred to the patient's mouth. The access hole position was marked with a soft marker to locate the screw position. Finally, drilling with a high speed bur was performed until reaching the abutment screw to retrieve the cemented bridge. Conclusion: This simple method could provide a predictable method for retrieving cement-retained implant bridges, especially after permanent cementation, while maintaining the integrity of both the implant fixture and the superstructure prosthesis on the condition that a patient cast is present. Keywords: cement retained implant bridge, screw loosening and retrievability