DOS BULLETIN - Dansk Ortopædisk Selskab
DOS BULLETIN - Dansk Ortopædisk Selskab
DOS BULLETIN - Dansk Ortopædisk Selskab
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2010-378_<strong>DOS</strong> nr. 3 2010 29/09/10 10:08 Side 115<br />
10 year follow-up of cemented Bimetric® titanium<br />
stem in Total Hip Arthroplasty (THA)<br />
Peter Heide Pedersen, Gitte Broholm Hansen, Poul T. Nielsen,<br />
Mogens Berg Laursen<br />
Ortopædkirurgien Nordjylland<br />
Background: Reports on the long-term results of cemented titanium<br />
femoral stems in THA have been conflicting. Many authors describe early<br />
aseptic loosening and revision rates of up to 25%, whilst others<br />
describe good long-term survival.<br />
Purpose: The aim of our study was to show the 10 year follow-up results<br />
of the cemented Bimetric® titanium stem in THA with regards to aseptic<br />
loosening, stem migration and clinical outcome.<br />
Methods: Retrospectively a cohort of 362 patients (227 women and 135<br />
men) with unilateral THAs operated between Oct. 1991 and Dec.1997<br />
was defined. 136 were available for a clinical and radiological 10 year<br />
follow-up examination. For the remainder data were extracted from the<br />
patient records. In all cases the cemented Bimetric® titanium stem was<br />
used, and cemented with 3rd generation cementing technique, aiming for<br />
a 2 mm cement mantle, using a distal centralizer. The mean age at the<br />
time of surgery was 74 (range 29-92) years.<br />
Findings: 226 (62.4 %) patients died before 10 year follow-up. A part of<br />
these had sufficient data registered for calculating preoperative and 1<br />
year postoperative Harris Hip Scores. Stem survival in this group was<br />
220/226(97.3%). At 10 year follow-up 136 patients were alive, and 64<br />
patients (47.1%) took part in clinical and radiological controls, mean<br />
observation time 11.4 years. 1 patient was revised due to aseptic loosening,<br />
making the survivorship of femoral stems in this group 98.4%. Harris<br />
Hip Score was good or excellent in 71.9% (46/64) and satisfactory in<br />
21.9%, 2 patients (3.1%) were not satisfied.<br />
Conclusion: From our mid term results it seems that good long-term<br />
results can be achieved with the cemented Bimetric® titanium stem,<br />
with a survival rate of 98.4% at 11.4 years.<br />
115