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Journal of Bone and Joint Surgery - British Volume, Vol 86-B, Issue 2,
172-176.
doi: 10.1302/0301-620X.86B2.14371 Copyright © 2004 by British Editorial Society of Bone and Joint Surgery Roentgen stereophotogrammetric analysis of the Birmingham hip resurfacing arthroplastyA TWO-YEAR STUDYS. Glyn-Jones, MRCS, Specialist Registrar in Orthopaedics; H. S. Gill, DPhil, Senior Research Fellow; P. McLardy-Smith, FRCS, Consultant Orthopaedic Surgeon; and D. W. Murray, FRCS, Consultant Orthopaedic SurgeonBotnar Research Centre, University of Oxford, Nuffield Orthopaedic Centre, Windmill Road, Headington, Oxford OX3 7LD, UK. Correspondence should be sent to Dr H. S. Gill. 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. This article has been cited by other articles:
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