Department of Orthopaedics, Rijnstate Hospital, Arnhem, The Netherlands.
J Arthroplasty. 2013 Aug;28(7):1177-84. doi: 10.1016/j.arth.2012.08.025. Epub 2012 Dec 6.
A randomized controlled trial was performed to evaluate acetabular bone mineral density (BMD) changes after hip resurfacing (RHA) versus an established conventional total hip arthroplasty (THA). A total of 71 patients were allocated randomly to receive either an RHA press-fit cobalt-chromium cup (n=38) or a THA with a threaded titanium cup and polyethylene-metal-inlay insert (n=33). The BMD in five separate periacetabular regions of interest (ROI) was prospectively quantified preoperative until 24 months. We conclude that, in contrast to our hypothesis, periacetabular BMD was better preserved after RHA than after placement of a conventional THA. Long term follow-up studies are necessary to see whether this benefit in bone preservation sustains over longer time periods and whether it is turned into clinical benefits at future revision surgery.
一项随机对照试验评估了髋关节表面置换术（RHA）与传统全髋关节置换术（THA）后髋臼骨密度（BMD）的变化。共有 71 例患者被随机分配接受 RHA 压配合钴铬杯（n=38）或 THA 螺纹钛杯和聚乙烯金属镶嵌植入物（n=33）。术前至 24 个月，前瞻性定量测量五个髋臼感兴趣区（ROI）的 BMD。我们的结论是，与我们的假设相反，与传统 THA 相比，RHA 后髋臼周围 BMD 保存更好。需要长期随访研究来观察这种骨保存的益处是否在更长的时间内持续存在，以及它是否在未来的翻修手术中转化为临床益处。
