SELF-ADAPTIVE AND AUTOSTABLE INTERVERTEBRAL DISC PROSTHESIS.

摘要

The present invention relates to a prosthesis (1) of intervertebral disc comprising at least three parts including a first plateau said top plate (2), a second plateau said bottom plate (3), and a movable core (4) disposed between said plates ( 2,3), characterized in that the movable core (4) has a concave surface (44) for contact with the upper plate (2) and a convex surface (45) for contact with the lower plate (3), each of said surfaces being determined by a distinct radius of curvature, the radius of curvature of the concave surface (44) being smaller than that of the convex surface (45), the centers of said radii of curvature being located on the radial axis of symmetry of the core central and placed on the same side of the prosthesis (1), that of the upper plate (2).