Purpose: To assess the effect of extraoral polishing of the crown-abutment interface on the marginal fit of implant-supported screw- and cement-retained prostheses (SCRPs).
Materials and Methods: In 31 patients, the marginal gap of an SCRP was measured using a stereomicroscope before and after polishing of the crown-abutment interface, and the paired data were compared.
Results: The marginal gap was significantly decreased after surface polishing regardless of the prosthesis material (P < .001).
Conclusion: Extraoral polishing of the crown-abutment interface could improve the marginal fit of SCRPs.