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We performed surface replacement of the hips with the THARIES system to twelve patients of coxarthrosis. There were one male and eleven female patients; the average age was 44 years (range: twenty-seven to fifty-eight years). The several points of resurfacing procedure were discussed and a case of revision was demonstrated. To Japanese patients SR 1 or 2 size of the femoral cup is generally suitable.Cyst of the femoral head was thoroughly curretted and packed with cancellous chipped bone. If cystic area occupied more than half of the trimmed femoral head, we abandoned the THARIES and indicated conventional total hip replacement.In some of the secondary coxarthrosis the cut surface of the femoral neck was oval-shaped and the eccentric cup looked like unstable.One of the major complications of resurfacing is neck fracture. T. H., thirty-one year-old female, showed a band-like radiolucent appearance of the neck, soon after weightbearing was allowed. She was strictly prohibitted full weight-bearing and walked with crutches.A. N., forty-eight year-old male, showed acetabular loosening, shortening of the neck and varus shift of the cup. Salvege operation revealed loosening of the system, bone absorption and development of osteonecrosis.
西日本整形・災害外科学会の論文