| 摘要 |
<p>An improved knee prosthesis of the meniscal knee type having at least a tibial component (12), a femoral component (11) and a meniscal bearing (13) adapted to be placed between the tibial and femoral components. The bearing surface (14, 15) of the femoral component having a first anterior portion having a radius of curvature greater than the radius of curvature of a second posterior portion and the meniscal bearing having an upper surface (21) having first and second bearing portions (22, 23) respectively substantially congruent with the first and second bearing portions of the femoral component. The first and second bearing surfaces of the meniscal bearing being separated by a short area (24) which is planar or has a longer radius of curvature than either of the first and second bearing surfaces. Also, a knee prothesis is described which is characterised in that the meniscal bearing has a heel (25) extending posteriorly beyond the extend of the concave portion of its upper surface.</p> |
