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Friday, October 8, 2010, 15:00-16:00Session A15: Alternate Bearings 2Delta AMC Ceramic Joints in THA : A Monocentric Study of 141 CasesWith Minimum 2 Years Follow-Up.*Jean Yves Lazennec - APHP SALPETRIERE - Paris, FRANCEAlexandre Ducat - hopital la pitie - paris, franceAlfonso RANGEL - hopital la pitie - paris, franceVicente Gozalbes - hopital la pitie - paris, franceYves CATONNE - hopital la pitie - paris, france*Email: haciba.khelifi@luc-voyages.comIntroductionWear performances and fracture toughness of the alumina-matrix composite (AMC) Bioloxdelta®are pointed out in the literature. This study is a prospective monocentric evaluation of 32and 36 mm AMC / AMC bearing surfaces .Material and methods141 THA were included prospectively since 2006 in 127 patients . (62 females ,65 males ,meanage 62,2 years, mean BMI 25,5). 134 cases were primary implantations. Mean follow-up is 40.9months (29.8-53.4).In all patients we used the same cementless stem and cup.Clinical and radiological data were evaluated with a special attention for ceramic fracture andsqueaking .ResultsAt follow-up mean HHS is 95.4 . We faced current problems in this series (2 postop.dislocationsin non compliant patients, 1 hematoma, 3 early septic complications inimmunodepressed patients)Intraoperative events were 3 non relevant femur fractures and 1 partial acetabular fracture4 cases needed a revision ( 1 cup and 1 stem loosening , 1 painful stem, 1 limb lengthdiscrepancy )No abnormal wear, osteolysis or implants migration could be detected in the other cases . Noceramic head fracture or liner chipping occurred.No patient reported squeaking.Discussion and conclusionIn this monocentric report the Delta COC articulation provides similar functional scores andsurvivorship as previously published ceramic on ceramic series. We did not observe ceramicfracture . Unusual rates of liner chipping have been described in an other multicentricstudy.According to our experience and despite the short follow-up ,we suggest that thosecomplications could be related to cup design rather than to the ceramic material .file:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]