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Stability of the Birmingham hip resurfacing arthroplasty at two years. A radiostereophotogrammetric analysis study



Stability of the Birmingham hip resurfacing arthroplasty at two years. A radiostereophotogrammetric analysis study



Journal of Bone and Joint Surgery. British Volume 87(2): 158-162



The Birmingham hip resurfacing metal-on-metal arthroplasty was introduced in 1997 and has shown promising short- to mid-term results. We used radiostereophotogrammetric analysis (RSA) to study the stability of 20 resurfacing arthroplasties over a follow-up period of 24 months. Radiological examinations for RSA were performed immediately after surgery and at two, six, 12 and 24 months after operation. Precision and detection of migration thresholds (non-zero movement) were calculated. All the results corresponded well to those found in similar experimental arrangements with standard hip prostheses. Migration of the cup and vertical and mediolateral migration of the head were calculated. The values were low at two years compared with those of earlier studies of cemented femoral components in conventional total hip replacements indicating that there was no evidence of excessive early migration or loosening of the components.

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Accession: 050372482

Download citation: RISBibTeXText

PMID: 15736734

DOI: 10.1302/0301-620x.87b2.15394


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