[Five-year survival rate of the Allofit titanium press-fit cup].
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.


CONCLUSIONS
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.
Schroeder
K
K
Stiftung Orthopädische Universitätsklinik, Heidelberg, Deutschland. k.schroeder@friedrichsheim.de
Moehlenbruch
A
A
Zimmermann-Stenzel
M
M
Parsch
D
D
D019644:Arthroplasty, Replacement, Hip / Q000706:statistics & numerical data*; D019544:Equipment Failure Analysis / Q000706:statistics & numerical data*; D005500:Follow-Up Studies; D005858:Germany; D006801:Humans; D015994:Incidence; D011475:Prosthesis Failure; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D014025:Titanium; D016896:Treatment Outcome
D014025:Titanium