Patent ID: 6610099
Filing Date: 2003-08-26
Classification: A61B,A61C,A61F

Abstract:
A prosthetic fixture for insertion into and permanent anchorage in a cavity formed in bone tissue, comprising:a fixture member sized and configured for insertion into the cavity and permanent anchorage therein, wherein the fixture member has a longitudinal direction, an insertion end surface and a cylindrical screw-threaded peripheral surface; a plurality of circumferentially-spaced cutting recesses, which are formed in a forward, self-tapping end portion of said screw-threaded peripheral surface adjacent to said insertion end surface and which open axially into said insertion end surface; and a plurality of circumferentially-spaced tissue-collecting and tissue-distributing grooves which are formed in a rear, non-self-tapping part of said screw-threaded peripheral surface and which open radially outwards and extend at least partially in said longitudinal direction of the fixture member, wherein each one of said grooves, at a forward end thereof, is connected to one of said cutting recesses and wherein each one of said grooves, at a rearward end thereof, is closed so that further rearward flow of the cut-off bone material within a diameter defined by the rear, non-self-tapping part of the screw-threaded peripheral surface is blocked so that the cut-off bone material collected from a cutting recess is guided radially out of the groove and distributed circumferentially around the inner surface of said cavity during the insertion of the fixture.