Patent ID: 7842089
Filing Date: 2010-11-30
Classification: A61F

Abstract:
1. An intervertebral disc prosthesis comprising: two plate-shaped or cup-shaped rigid half-shells, each of the half shells being configured to be fixed to one of two vertebrae adjacent to an intervertebral disc to be replaced, the two rigid half-shells being disposed on respective sides of a compression pad and affixed thereto; and a first of said two half shells comprising, in a central zone thereof, a hollow shaft oriented toward a second of said two half shells, the second half-shell comprising, in a central zone thereof, a stud oriented toward the first half-shell and penetrating into the hollow shaft, the compression pad including a core portion operatively engaged between and in contact with the hollow shaft and the stud, and an outer ring portion disposed outwardly of the core portion and of the hollow shaft, wherein the outer ring portion comprises a first surface and a second surface opposed to the first surface, the first and second surfaces of the outer ring portion being respectively affixed to inner surfaces of the two half-shells.