Patent ID: 6146425
Filing Date: 2000-11-14
Classification: A61F

Abstract:
Screw-in type artificial hip joint socket comprising a shell body having an outer surface, said outer surface having a threaded portion provided thereon with a self-tapping threading for screwing into the acetabulum along a socket axis, said outer surface exhibiting a progressive or stepwise resolved curvature within said threaded portion, said threading having helical cutting grooves and/or a thread tooth profile tilted away from a plane radial to said socket screw-in axis, wherein said the thread has a pitch that varies relative to said socket axis depending upon:(a) the curvature of the shell body outer contour relative to said socket axis,(b) the angle of tilt of the thread tooth profile,(c) the twist angle of the cutting groove, and(d) the coarseness of the texture of the thread surface.