Comparison of the Effect of Implant Abutment Surface Modifications on the Retention of Implant-Supported Restorations.

Purpose: To evaluate and compare the difference in retention between implant-supported restorations with and without surface modification of the implant abutments.

Materials And Methods: A total of 30 patients with singletooth implants were restored with cement-retained (Multilink N, Ivoclar) restorations using titanium base abutments (Variobase, Straumann) and randomly assigned surface modifications. Group 1 used nonmodified abutments, group 2 used sandblasted abutments, and group 3 used sandblasted abutments followed by an application of metal primer.