A bone prosthesis for implantation at a joint includes a stem having a tip generally at one end thereof. The stem is sized and shaped for reception in a bone at the joint such that the tip of the stem is exposed to locations outside of the bone. The stem has a passageway extending from a first location...http://www.google.de/patents/US20040193281?utm_source=gb-gplus-sharePatent US20040193281 - Bone prosthesis and method of implantation
