A joint prosthesis comprising two co-operating prosthesis members fastening each to a different joint bone. At least one of the prosthesis members is formed by at least two prosthesis elements one surrounding the other, the one prosthesis element adjacent the bone being provided with fastening means...http://www.google.es/patents/US5032134?utm_source=gb-gplus-sharePatente US5032134 - Joint prosthesis and tool to be used therewith
