Patent ID: 6506192
Filing Date: 2003-01-14
Classification: A61B,A61F,Y10S

Abstract:
A bone screw constructed of a biomaterial selected from a group consisting of allograft bone, bioceramics, bioresorbable polymeric material, said bone screw comprising a cylindrical shank with a threaded portion and an unthreaded portion, one section of which tapers outwardly, said outwardly tapering section being adjacent to an integrally formed drive head to form a tapered undercut for the drive head, said drive head being formed with a rectangular shaped body defining a wedge shaped end, said tapered undercut being funnel shaped and tapered at an angle ranging from about 20Â° to 45Â° from the center axis of the cylindrical shank and has a flat end surface transverse the center axis of the cylindrical shank adjacent said drive head to form a shoulder.