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at operation was 18 years (range, 13-20). There were 14 females (78%) and 4 males (22%).Nine patients (50%) were Caucasian, 8 (44%) were African-American, and 1 (6%) was Asian.Average follow-up was 45 months (range, 16-85). All patients failed conservative treatment; 15patients had prior core decompression and bone grafting. Underlying etiology waschemotherapy induced osteonecrosis (7, 33%), steroid induced osteonecrosis (6, 29%), sicklecell disease (5, 24%), and chronic dislocation (3, 14%); 1 patient underwent THA for fractureof a previous ceramic bearing, 1 patient had a slipped capital femoral epiphysis, and 1 patienthad idiopathic joint destruction. Components implanted were ceramic/ceramic (14, 67%),metal/highly cross-linked polyethylene (6, 29%), and metal/metal surface replacement (1, 5%).RESULTS: HHS scores improved from 43.6 pre-operatively to 83.6 post-operatively(p ±3° from the neutral compared to 1.3% of the limbs (1 out of72) in the computer-assisted group (p=0.0001).Computer-assisted total knee arthroplasty performed in obese patients showed excellent limband component alignment with very few outliers when compared to conventional total kneefile:///E|/ISTA2010-Abstracts.htm[12/7/2011 3:15:47 PM]