Gross Thomas P, Liu Fei
Midlands Orthopaedics, Columbia, SC 29201, USA.
Acta Orthop Belg. 2012 Dec;78(6):735-44.
The purpose of this study was to compare the clinical outcomes of osteonecrosis (ON) and osteoarthritis (OA) patients after metal-on-metal hip resurfacing arthroplasty (HRA). We retrospectively reviewed our database and identified a study group of 122 HRA cases with the primary diagnosis of ON. A control group of 122 OA cases were randomly selected by a computer program to match the surgical date, gender and the femoral component type and size with the study group. We compared the results between these two groups and also compared the clinical outcome between cemented and uncemented HRA in ON cases. Overall survivorship, using any revision as an endpoint, was 88% for ON, compared to 100% for OA at ten years. There were no femoral failures in 47 uncemented femoral cases. Our study suggests that HRA may not be suitable for everyone, such as ON patients.
本研究的目的是比较金属对金属髋关节表面置换术（HRA）后骨坏死（ON）患者和骨关节炎（OA）患者的临床结局。我们回顾性地查阅了我们的数据库，确定了一个由122例初次诊断为ON的HRA病例组成的研究组。通过计算机程序随机选择122例OA病例作为对照组，使其手术日期、性别以及股骨假体类型和尺寸与研究组相匹配。我们比较了这两组之间的结果，还比较了ON病例中骨水泥型和非骨水泥型HRA的临床结局。以任何翻修为终点计算，ON患者10年的总体生存率为88%，而OA患者为100%。47例非骨水泥型股骨病例中未出现股骨假体失败情况。我们的研究表明，HRA可能并不适合所有人，比如ON患者。
