| abstract |
Tibial component ( 10 ) of a knee-joint endoprosthesis with a flat tibial bearing surface ( 11 ), a bearing body ( 12 ) that is slidably seated thereon and comprises two concave bearing dishes ( 13 ) in which a femoral component can be movably seated, and with a rotational guide means that guides the rotation of the bearing body ( 12 ) on the tibial bearing surface ( 11 ) about an axis ( 14 ) perpendicular thereto. The guide means comprises a bearing post ( 15 ) in the form of a regular cylinder that stands upright on the tibial bearing surface ( 11 ) and has at least one projection ( 16, 17 ) extending radially outward. The bearing post so constructed can be inserted into a post receptacle ( 19 ) that is formed on the underside of the bearing body ( 12 ) with a receiving groove ( 20 ) corresponding to the post projection ( 16, 17 ). The at least one post projection ( 16, 17 ) extending radially outward is spaced apart from the free end ( 24 ) of the post. |