A prosthesis for implantation in a bone includes a collar having a first surface and a second surface generally on an opposite side of the collar for engaging the bone and transferring forces to the bone. A neck extends outwardly from the first surface and is adapted to receive a ball thereon. A stem...http://www.google.fr/patents/US6783553?utm_source=gb-gplus-shareBrevet US6783553 - Prosthesis
