| 摘要 |
<p>An endoprosthesis for a femoral hip joint comprises a stem (1) with a collar (3) which bears against a resected bone surface and has a blocking cone (4) on which the ball head (5) is positioned. A screw (12) which grips the prosthesis as a tensioning stay passes through a lateral bore extending obliquely downward and outward through the femur. The prosthesis stem is designed to permit cementless fixation and to prevent crack formation in the femur due to rigidity of the stem, even under extreme loads. To this end, the prosthesis stem (1) is lodged in a mating fit in a medullary nail (7) driven into the medullary canal, and the distal region of the prosthesis stem (1) is elastic.</p> |
