| 摘要 |
The invention relates to a prosthesis for facet joints ( 12 ) of the spinal column, with a bearing piece ( 23 ) and a guide rod ( 21 ). The bearing piece ( 23 ) comprises a pressure plate ( 24 ) for resting on an articular surface ( 13, 14 ) of the vertebra ( 1 ) and, on the opposite side, a bearing insert ( 27 ) which has an articular surface for interacting with an articular surface ( 13, 14 ) of an adjacent vertebra ( 1 '). The guide rod ( 21 ) is secured on the bearing piece ( 23 ) by means of a pivot joint. The bearing forces are transmitted to the vertebra ( 1 ) via the pressure plate ( 24 ). In this way, the guide rod ( 21 ) can have a narrow configuration, such that the slit ( 18 ) for receiving the guide rod on the vertebra ( 1 ) can also be made narrow. This permits a simple and reliable implantation technique which at the same time is gentle on bone substance.
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