| 摘要 |
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 extends outwardly from the second surface of the collar for reception in the bone. The second surface is shaped to promote force transmitting engagement of the second surface with the bone over at least a substantial portion of the second surface, to limit engagement of the second surface with the bone at an area of stress concentration in the second surface, and to inhibit line contact between the second surface and bone. |
