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[Five-year survival rate of the Allofit titanium press-fit cup]
K Schroeder1, A Moehlenbruch, M Zimmermann-Stenzel
1Stiftung Orthopädische Universitätsklinik, Heidelberg, Deutschland. k.schroeder@friedrichsheim.de
Background:
The Allofit titanium press-fit cup has become the best-selling cementless acetabular implant in Germany, with approximately 30,000 implants sold in 2007. However, only a limited number of scientific publications - mostly from the development centres in Austria - support this success on the market.
Methods:
At our institution in 1999-2000, 174 total hip replacements were performed using the Allofit cementless press-fit cup. At a mean follow-up of 5.3 years (range 40-85 months), 154 patients were evaluated clinically and radiographically, representing a follow-up rate of 89%.
Results:
The 5-year survival rate was 98.1% (95% CI: 95.8-100%), with revision for any reason as an end point. Three cups were revised (aseptic loosening with one, and two septic complications). The average Harris hip score was 89.1+/-13.7 in all unrevised patients.
Conclusion:
We confirm the excellent survival rates of the Allofit cup as reported by the development centres, supporting the ongoing use of the cup at our institution.
