Jansson V, Refior H J
Orthopädische Klinik und Poliklinik, Ludwig-Maximilians-Universität München, Federal Republic of Germany.
Arch Orthop Trauma Surg. 1992;111(6):305-8. doi: 10.1007/BF00420055.
The results of radiologic and clinical follow-up of 81 PCA (porous coated anatomie) hip joint prostheses implanted in our clinic between 1986 and 1988 are presented. One of the prostheses had to be explanted because of aseptic loosening after 2.5 years' implantation. Contrary to the fixation concept of the prosthesis, which requires both proximal osseointegration and free axial shifting of the distal part of the prosthesis, our follow-up radiographs showed proximal lysis of 2 mm and more as well as distal hypersclerosis of 3 mm and more in the form of endosteal bone formation in 70% of cases 3 years after implantation. On the basis of our data, the question whether these bone reactions will finally lead to aseptic loosening of the implant cannot be answered yet.
本文展示了1986年至1988年间在我们诊所植入的81个PCA（多孔涂层解剖型）髋关节假体的放射学和临床随访结果。其中一个假体在植入2.5年后因无菌性松动而不得不取出。与假体的固定概念相反，该概念要求假体近端骨整合以及远端部分自由轴向移动，但我们的随访X光片显示，植入3年后，70%的病例出现近端溶解2毫米及以上，以及远端骨内膜骨形成形式的硬化3毫米及以上。根据我们的数据，这些骨反应最终是否会导致植入物无菌性松动的问题尚无法回答。
