Patent ID: 7942883
Filing Date: 2011-05-17
Classification: A61F

Abstract:
1. A tool for removing the acetabular shell of an artificial hip, having a semi-spheroidal outer surface and a semi-spheroidal inner surface, said tool comprising: (a) a fixture which attaches to the acetabular shell; (b) a chisel guide mounted on said fixture; (c) a chisel associated with said chisel guide, wherein said chisel guide controls the movement of said chisel such that said chisel substantially circumscribes the outer surface of the acetabular shell when moved; (d) wherein said chisel is slidably carried by said chisel guide; and (e) wherein the shell has a circumferential groove located on its inner surface and said fixture includes a centering plate which is circular in cross-section and fits into the shell and has one or more detents which engage said groove to attach said centering plate to the shell.