| 摘要 |
<p>The invention relates to a vario-head endoprosthesis, consisting of a ball-shaft prosthesis (5), for example a femur prosthesis, and a vario-head socket (1, 2) which is provided with a positive safeguard for the prosthesis head, in the form of a construction of the aperture of the socket. To prevent an undesirable dislocation of the prosthesis head from the socket, the constriction is formed, according to the invention, by a ring (11) which is held in an annular groove (8) in the socket, close to the aperture. After the head has been inserted, the ring can be pushed in and withdrawn in the circumferential direction through a cut-out (10) in the groove.</p> |
