Abstract
We followed 24 patients (26 hips) with uncemented total hip replacement for a minimum of 3 years. Patient mean age was 52 (40–69) years. The aim was to evaluate femoral periprosthetic bone mineral density (BMD) using quantitative computed tomography osteodensitometry. At 3-years’ follow-up, 25 hips were clinically rated good or excellent. The mean Harris hip score rose from 58 (49–68) pre-operatively to 94 (81–98) at the last follow-up. All hips were radiologically stable. Mean decrease of the overall BMD in the femoral metaphysis was 14.3%, and mean decrease of cortical BMD was 17.3%. In the diaphysis, mean decrease of overall BMD was 5.5% and mean decrease of cortical BMD was 4.5%. Observed loss was markedly lower than in comparable series with uncemented stems.
Résumé
Nous avons suivi 24 malades (26 hanches) pendant un minimum de trois ans après arthroplastie par prothèse totale non cimentée. L’âge moyen des malades était de 52 ans (40–69) . Le but était d’évaluer les densités minérales osseuses (DMO) périprothétiques fémorales en utilisant la tomodensitométrie qualitative. Àprés 3 années, 25 hanches ont été estimées cliniquement bonnes ou excellentes. Le Score de Harris moyen a été élevé de 58 (49–68) en préopératoire à 94 (81–98) au dernier suivi. Toutes les hanches étaient radiologiquement stables. La baisse moyenne de la DMO totale dans la métaphyse fémorale était de 14,3%, et la baisse moyenne de la DMO corticale était de 17,3%. Dans la diaphyse la baisse moyenne de la DMO totale était de 5,5%, et la baisse moyenne de la DMO corticale était de 4,5%. La perte observée était notablement inférieure à celle notée dans des séries comparables de tiges non cimentées.
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