Patent ID: 6340300
Filing Date: 2002-01-22
Classification: A61C

Abstract:
Self-tapping dental implant, of the type which is fixed into the upper jawbone, is used as a base for fixing dental prostheses and includes an elongated, cylindrical main body, provided with an external screw thread, of a metallic material for implanting in a jawbone and provided, at its outer end, with a frusto-conical portion (3), a larger outer base of which has a protuberance (5) of relatively reduced height and an essentially straight prismatic polygonal cross-section, said frusto-conical portion being coaxial to the main body and being provided with a threaded central coaxial hole (10) adapted to receive a fixing screw of a dental prosthesis, the lateral sides (8) of the prismatic protuberance (5) being adapted to be engaged by a tool for threading the implant into a preformed hole on the upper or lower jawbone, characterized in that the outer surface of said prismatic protuberance (5) has an outward tubular extension (6), coaxial to the main body, and provided with a hole aligned with the central hole (10) which allows the fixing screw to pass through and has an outer surface (8) which is provided with external threads (9) adapted to receive the threads on an inner surface of a base of a pre-prosthetic cap which is also, provided with a through hole which allows the fixing screw to pass through from the prosthesis to the implant, wherein the pre-prosthetic cap is adapted to be fixed solidly by threading onto said external threads (9) on said tubular extension (6) and covering the protuberance (5) without the need for any additional screw.