Preloads generated with repeated tightening in three types of screws used in dental implant assemblies.

Purpose: Abutment screw loosening, especially in the case of cemented single tooth restorations, is a cause of implant restoration failure. This study compared three screws (titanium alloy, gold alloy, and gold-coated) with similar geometry by recording the preload induced when torques of 10, 20, and 35 Ncm were used for fixation.

Materials And Methods: Two abutment types were used-prefabricated preparable abutments and cast-on abutments.