DRILL BIT FOR REMOVING IMPLANT FASTENING SCREW AND GUIDING SOCKET THEREOF

摘要

The present invention discloses a drill bit for removing implant fastening screw which comprises the hole drilling drill bit 110 for axially drilling a hole in the fastening screw which broken or damaged in an implant and the screw lifting drill bit 130 for being firmly fixed the hole of the fastening screw and for lifting the fastening screw, and a guiding socket 120 which comprises the fastening portion 121 for being firmly fastened in the upper end portion of an implant in which a broken or damaged fastening screw is remained and a guiding portion 122 for guiding the hole drilling drill bit 110 to meet the central axis of the fastening screw and the central axis of the hole drilling drill bit 110.