Screw fastener for dental implant has cylindrical head of screw fitting inside cylindrical bore of slightly greater diameter than bore surrounding cylindrical top portion

摘要

The cylindrical head (1) of the screw forms a shoulder at its join with the cylindrical portion (2) of the screw above the threaded portion. It fits in an implant body (10). The bottom part of the implant has a tapered bore and slits (14) so that it may be spread by a spherical or oval nut (12) fitting on the bottom end of the screw.