We examined aseptic loosening and osteolysis in 77 revised McKee-Arden total hip arthroplasties (THAs) using polyethylene cups and identical femoral stems made from either cobalt chrome alloy or titanium alloy. Time to failure was significantly shorter in the titanium group. Loosening and peri-prosthetic osteolysis occurred with significantly higher frequency in the titanium group compared to the cobalt chrome group.Résumé Nous avons étudié le descellement aseptique et l'ostéolyse pour 77 arthroplasties totales de hanche de McKee-Arden qui utilisent des cupules de polyéthylènes et des tiges fémorales identiques fabriqué soit en alliage de chrome cobalt soit en alliage de titane. Le délai d'échec était considérablement plus court dans le groupe titane. Descellement et ostéolyse péri -prothétique se sont produits avec une fréquence trés supérieure dans le groupe titane comparé au groupe cobalt chrome.
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