A prosthesis comprising a proximal portion (1) which is shaped to fit within the medullary canal of the metaphysis of the bone and a distal portion (2) shaped to fit within the medullary canal of the diaphysis of the bone. The proximal and distal portions (1,2) are separately formed and fit together...http://www.google.es/patents/US5116379?utm_source=gb-gplus-sharePatente US5116379 - Prosthesis