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O2033 SHORT TERM EXPERIENCE OF THE BIRMINGHAM HIP RESURFACING (BHR) IN COMPARISON WITH THE HISTORIC WAGNER HIP RESURFACING (WHR) AND METASUL THR”



Abstract

Aims: Do the short term results, histopathological þndings and metal ion concentration predict a better outcome of modern metal-on-metal Hip Resurfacings (BHR) in comparison with historic metal-on-polyethylene Resurfacings? Methods: Comparison of 241 BHR arthroplasties with a follow up from 6 months to 4 years with long time results of 305 WHR; of 7 BHR and 3 MetaSUL capsule tissue histologyñs and chromium and cobalt serum concentrations of 67 BHR patients and 32 patients after MetaSUL THR implantation. Results: We achieved mean Harris Hip Scores of 90–92 in our BHR series with no radiological signs of aseptic loosening and a revision rate of 1.7% after approx. 18 months in opposition to 8% of the WHR after 2 years. The BHR capsule tissue showed wear particles in only 2 of 7 cases in opposition to MetaSUL joints, where in every case wear particles were detectable. We found no statistical difference in metal ion serum levels between BHR and Meta-SUL joints. Conclusions: In our opinion the cementless press þt cup, the low wear metal-on-metal bearing and the conservative implantation technique of the BHR at least fundamentally improves the known disadvantages of the historic Resurfacings which may predict better long term results.

Theses abstracts were prepared by Professor Dr. Frantz Langlais. Correspondence should be addressed to him at EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.