Bradley G W, Freeman M A, Revell P A
Clin Orthop Relat Res. 1987 Jul(220):137-41.
Although obvious theoretic advantages accrue from resurfacing arthroplasty of the hip, the indications for the procedure are controversial because the failure rate is high and loosening is unacceptably frequent. To determine the role of osteonecrosis in these failures, the viability of bone within the femoral head was determined by histologic examination of bone inside 25 failed femoral resurfacing components. The bone was substantially alive throughout the femoral head in 23 of 25 cases (92%). In two cases, the bone of the femoral head was dead. Both of these hips had clinically failed because of femoral neck fracture. This histologic evaluation indicates that bone death is not an inevitable consequence of femoral head resurfacing and the use of polymethylmethacrylate fixation.
尽管髋关节表面置换术在理论上有明显优势，但该手术的适应症仍存在争议，因为失败率高且松动情况频繁出现，令人难以接受。为了确定骨坏死在这些失败病例中的作用，通过对25个失败的股骨表面置换部件内的骨组织进行组织学检查，来确定股骨头内骨的活力。在25例病例中的23例（92%）中，股骨头内的骨基本存活。在两例病例中，股骨头的骨已坏死。这两个髋关节均因股骨颈骨折而临床失败。这种组织学评估表明，骨坏死并非股骨头表面置换术及使用聚甲基丙烯酸甲酯固定的必然结果。
