An intervertebral disk prosthesis includes a first part, and the first part has a top, a bottom having an opening, an outer surface, an inner surface and a socket extending into an interior of the first part from the opening and defined by the inner surface. The outer surface proximate the top contacts...http://www.google.de/patents/US7011684?utm_source=gb-gplus-sharePatent US7011684 - Intervertebral disk prosthesis
