| 摘要 |
<p>A joint prosthesis is provided for replacing a joint between two bones in which one bone is normally permitted a substantial degree of rotary circumduction with respect to a second bone. A first member (12) of the prosthesis is provided with a coupling portion enabling it to be attached to the elongated bone and includes a head having a generally saddle shaped articulating surface facing away from the stem. The second member (14) similarly has a connector adapted to connect the second member to the second bone, and has a head provided with a saddle shaped articulating surface configured and sized to articulate with the saddle shaped surface of the first member to enable one of the long bones to move in rotary circumduction with respect to the other. The saddle shaped surfaces preferably are substantially congruent in shape.</p> |
