Abstract: A self-locking and threaded bone tack screw device (10) for fixing and retaining tissue grafts and synthetic membranes directly to a maxillofacial bone graft site. The tack has an oversized cylindrical dome shaped head (14) for retaining the tissue and synthetic membrane to the bone graft site and a hexagonal recess (14a) for easy insertion and removal of the device. The tip of the device incorporates a sharp pin point (12a) to easily pierce the tissue and membrane and initially penetrate into the bone graft site. A locking flange (12c) locks into the bone graft site in a single direction. A self-tapping screw thread (12f) is provided for driving the pin point tip into the bone graft site. Incorporation of the self-locking pin point tip in series with the self-tapping thread allows the hexagonal tool driven bone tack to be easily inserted and removed from the graft site without compromising its fixation.

Abstract: A bone particle collecting unit (30) has first (32) and second (34) interfitting housing members capturing a cylindrical screen basket assembly (64). Bone particle containing effluent from a surgical site is received through a port (40) in the first housing member (32) into the screen basket assembly (64). Suction is applied from a port (56) in the second housing member (34) to remove liquid which passes through the screen basket assembly. The screen basket assembly (64) includes a disc (66) which frictionally receives one end of a cylindrical screen (70) with the other end o the screen received about a rib (42) formed in the first housing member (32). Disc (66) of the screen basket assembly is received on guide ribs (58) to seat the assembly in the second housing member (34).

Abstract: A screw driver system particularly adapted for use in placement and removal of dental implant screws is shown to comprise a forceps holder having distal pincer portions adapted to firmly engage the head of a screw driver at an optimal angle to permit improved visibility of the work area and access thereto when the system is placed in the mouth of a patient.