Joint Replacement Institute, St Vincent Medical Center, Los Angeles, CA, USA.
J Arthroplasty. 2013 Aug;28(7):1235-7. doi: 10.1016/j.arth.2013.03.015. Epub 2013 Apr 22.
Recent studies suggest that the tapered interface between stem and femoral head may be a substantial source of cobalt and chromium ion release after metal-on-metal (MOM) total hip arthroplasty (THA). This study compared patient ion levels after MOM hip resurfacing (HR) and MOM THA performed with identical acetabular components. 110 HRs were compared with 22 THAs. All had well-oriented components, unilateral implants, and serum ion studies beyond one year post-operatively. The HR group's median cobalt value was 1.11 μg/L vs. 2.86 μg/L for the THA patients. The HR group's median chromium value was 1.49 μg/L vs. 2.94 μg/L for THA. Significantly higher THA ion levels suggest a source of ions other than the MOM bearing itself.
最近的研究表明，在金属对金属（MOM）全髋关节置换（THA）后，柄和股骨头之间的锥形界面可能是钴和铬离子释放的一个重要来源。本研究比较了 MOM 髋关节表面置换（HR）和 MOM THA 患者的离子水平，这两种手术采用了相同的髋臼组件。比较了 110 例 HR 和 22 例 THA。所有患者的组件均定向良好，为单侧植入物，术后随访超过一年进行血清离子研究。HR 组钴的中位数为 1.11μg/L，而 THA 患者为 2.86μg/L。HR 组铬的中位数为 1.49μg/L，而 THA 患者为 2.94μg/L。THA 离子水平显著升高表明，除了 MOM 轴承本身之外，还有其他离子来源。
