Goldie I F, Raner C
Acta Orthop Scand. 1979 Apr;50(2):205-16. doi: 10.3109/17453677908989758.
The biomechanics are presented of a bushing principle forming the basis for a trunnion bearing prosthesis in total hip replacement. The femoral stem is equipped with a trunnion on to which a cylindrical plastic sleeve is applied. On top of this a metal casing is placed which forms the femoral head. On flexion-extension this remains stationary in the acetabular cup and motion occurs between the trunnion and the cylindrical sleeve. Friction between head and cup is reduced to a minimum, decreasing the risk of loosening. A follow-up study of 61 hips replaced by the trunnion bearing prosthesis was performed 2.5 years postoperatively. Eighty-eight per cent were considerably improved. There was one deep infection and two femoral stem loosenings.
介绍了一种用于全髋关节置换中耳轴轴承假体的衬套原理的生物力学。股骨柄配备有耳轴，在其上安装有圆柱形塑料套筒。在此之上放置一个金属外壳，该外壳形成股骨头。在屈伸过程中，它在髋臼杯中保持静止，运动发生在耳轴和圆柱形套筒之间。股骨头与髋臼杯之间的摩擦力降至最低，降低了松动风险。对61例接受耳轴轴承假体置换的髋关节进行了术后2.5年的随访研究。88%的患者有显著改善。有1例深部感染和2例股骨柄松动。
