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THE INFLUENCE OF THE UNDERLYING AETIOLOGY ON THE OUTCOME OF CEMENTLESS HIP REPLACEMENT IN PATIENTS WITH OSTEONECROSIS OF THE FEMORAL HEAD. RESULTS OF A RETROSPECTIVE STUDY

7th Congress of the European Federation of National Associations of Orthopaedics and Traumatology, Lisbon - 4-7 June, 2005



Abstract

Aims: The study aimed at analyzing the outcome of femoral components in patients with total hip replacement following osteonecrosis of the femoral head with regard to the associated factor of the osteonecrosis.

Methods: We reviewed 41 patients with 55 cementless total hip replacements operated for advanced osteonecrosis. According to etiology of the osteonecrosis patients were divided into two groups. The first group included 17 cases with osteonecrosis without a systemic disease and the second group 38 cases with osteonecrosis associated with a systemic disease (alcohol abuse, corticosteroid medication, sickle-cell-disease).

Results: The follow-up was on average 6.4 years (range, 2 to 12.8). Eight stem revisions had to be performed, all of them were in the patients with a systemic disease. Ten-year survival rates with femoral revision as the endpoint were in the first group 100%, and in the systemic disease group 68% (p=0.03).

Conclusion: The data of this retrospective study supports the notion that the aetiology of osteonecrosis might has an influence on the survival of the femoral component.

Theses abstracts were prepared by Professor Roger Lemaire. Correspondence should be addressed to EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.