Zerahn B, Storgaard M, Johansen T, Olsen C, Lausten G, Kanstrup I L
Department of Orthopaedic Surgery, Herlev Hospital, University of Copenhagen, Denmark.
Int Orthop. 1998;22(4):225-9. doi: 10.1007/s002640050247.
We have compared the differences in bone mineral density (BMD) adjacent to two biomechanically different cementless femoral stems used for total hip arthroplasty. Measurements were performed 12 to 38 months after surgery in a cross sectional study of 29 patients. Of these, 15 had arthroplasties using an "off the shelf" type cementless femoral stem (Spotorno), while 14 had a custom made cementless stem (Evolution-K). Dual X-ray absorptiometry (DXA) measurements revealed that the patients who had a Spotorno stem had a significantly lower BMD in the operated leg compared to the non-operated side in both Gruen zones 1 and 7, whereas no significant differences were found in these areas in the Evolution-K group. For both types of prosthesis there was a significant and similar decrease in BMD of the proximal tibia on the operated side.
我们比较了用于全髋关节置换术的两种生物力学不同的非骨水泥型股骨柄周围骨密度（BMD）的差异。在一项对29例患者的横断面研究中，于术后12至38个月进行测量。其中，15例使用“现货供应”型非骨水泥股骨柄（Spotorno）进行关节置换，而14例使用定制的非骨水泥柄（Evolution-K）。双能X线吸收法（DXA）测量显示，在Gruen 1区和7区，使用Spotorno柄的患者患侧腿部的骨密度明显低于非手术侧，而Evolution-K组在这些区域未发现显著差异。对于两种类型的假体，患侧胫骨近端的骨密度均有显著且相似的下降。
