Glyn-Jones S, Gill H S, McLardy-Smith P, Murray D W
Botnar Research Centre, University of Oxford, Headington, England, UK.
J Bone Joint Surg Br. 2004 Mar;86(2):172-6. doi: 10.1302/0301-620x.86b2.14371.
The Birmingham hip resurfacing (BHR) arthroplasty is a metal-on-metal prosthesis for which no medium- or long-term results have been published. Despite this, it is increasing in popularity as an alternative to stemmed prostheses for younger patients. Since the fixation of the socket is conventional, the major concern is long-term failure of the femoral component. This can be predicted by the use of roentgen stereophotogrammetric analysis (RSA). We have therefore undertaken such a study of the BHR femoral component over a period of two years. Twenty patients (22 hips) underwent a standard BHR procedure. Migration of the femoral component was measured by RSA at intervals of three, six, 12 and 24 months. At 24 months the total three-dimensional migration of the head was 0.2 mm. This was not statistically significant. Previous studies have shown that implants which loosen quickly have rapid early migration. Our results therefore suggest that the BHR femoral component is an inherently stable device which is likely to perform well in the long term.
伯明翰髋关节表面置换术（BHR）是一种金属对金属的假体，目前尚无关于其中长期效果的报道。尽管如此，作为年轻患者使用柄状假体的替代方案，它越来越受欢迎。由于髋臼的固定方式是传统的，主要关注点在于股骨部件的长期失效。这可以通过使用X线立体摄影测量分析（RSA）来预测。因此，我们对BHR股骨部件进行了为期两年的此类研究。20名患者（22髋）接受了标准的BHR手术。通过RSA在3个月、6个月、12个月和24个月的间隔时间测量股骨部件的移位情况。在24个月时，股骨头的三维总移位为0.2毫米。这在统计学上不具有显著性。先前的研究表明，松动较快的植入物早期移位迅速。因此，我们的结果表明，BHR股骨部件本质上是一种稳定的装置，可能在长期内表现良好。
