Abstract
We implanted 71 metal-backed, porous-coated, hemispheric, press-fit Duraloc-100 cups in 68 consecutive patients. In 61 patients, the femoral stem was a cementless Spotorno and in ten a cemented Lubinus SP II. A 28-mm Biolox ceramic head was used with both stems. After an average follow-up of 4 (3.7–5.9) years, we examined 67 hips. Radiolucencies were described in three zones according to DeLee and Charnley, and migration was measured on serial radiographs using the computer-assisted EBRA method. Total migration of more than 1 mm within the first 2 years occurred in 22/62 cups. Nine cups showed more than 1.5 mm total migration within the first 2 years and more than 2 mm within the whole period. The presence of post-operative radiolucencies correlated significantly with a total migration value of more than 2 mm within the first 2 years (p=0.02). Post-operative radiolucencies in zone 1 correlated with a total migration value of more than 2 mm within the first 2 years (p=0.027) and more than 2.5 mm within the whole period (p=0.051). These correlation values might reflect the quality of operative technique, particularly reaming, and implant selection.
Résumé
Nous avons implanté 71 cupules métal-back hémisphérique press-fit, revêtement poreux, Duraloc-100 chez 68 malades consécutifs. Pour 61 malades la tige fémorale était une Spotorno sans ciment et,pour dix, un tige cimenté Lubinus SP II. Un tête céramique Biolox 28 mm a été utilisée avec les deux tiges. Après une moyenne de suivi de 4 ans (3.7–5.9) nous avons examiné 67 hanches. Les liserés radiologiques ont été décrits dans les trois zones de DeLee et Charnley, et la migration a été mesurée sur des radiographies sérielles en utilisant la méthode EBRA assistée par ordinateur. Une migration totale de plus de 1 mm dans les deux premières années s’est produites dans 22/62 cupules. Neuf cupules avaient une migration totale de plus de 1.5 mm dans les deux premières années et de plus de 2 mm dans la période entière. La présence de liserés radiologiques postopératoires était corrélé avec une migration de plus de 2 mm dans les deux premières années (p=0.02). Les liserés radiologiques postopératoires en zone 1 correspondaient avec une valeur de migration de plus de 2 mm dans les deux premières années (p=0.027) et de plus de 2,5 mm dans la période entière (p=0.051). Ces valeurs peuvent refléter la qualité de la technique opératoire, en particulier le fraisage, et la sélection de l’implant.
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Stoeckl, B., Brabec, E., Wanner, S. et al. Radiographic evaluation of the Duraloc cup after 4 years. International Orthopaedics (SICOT) 29, 14–17 (2005). https://doi.org/10.1007/s00264-004-0600-z
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DOI: https://doi.org/10.1007/s00264-004-0600-z