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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.

Original publication

DOI

10.1302/0301-620x.86b2.14371

Type

Journal article

Journal

The Journal of bone and joint surgery. British volume

Publication Date

03/2004

Volume

86

Pages

172 - 176

Addresses

Botnar Research Centre, University of Oxford, Headington, England, UK.

Keywords

Humans, Osteoarthritis, Hip, Prosthesis Failure, Photogrammetry, Treatment Outcome, Arthroplasty, Replacement, Hip, Equipment Design, Equipment Failure Analysis, Hip Prosthesis, Adult, Middle Aged, Female, Male