Cementless Total Hip Arthroplasty with Femoral Head Bone Grafting for Acetabular Dysplasia. Radiographic Evaluation of the Acetabulum.:Radiographic Evaluation of the Acetabulum

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We performed cementless total hip arthroplasty (THA) with bone grafting for acetabular dysplasia in 30 hips since 1988 and reviewed these radiographically.The average period of follow-up was 4 years (range 1.2-6 years). The average age at operation was 53 years (from 33 to 77). The grafted bone was united in all cases and the mean resorption rate was 12.0% at the time of final observation. In 25 hips (83%), a reactive line at the interface between the socket and acetabular grafted bone was observed. The types of radiographic fixation were classified according to Ehgh et al.'s criteria as follows; optimum fixation in 23 hips, suboptimum fixation in 5, and unstable in 2. In cases in which the area of the socket covered by acetabular host bone was large, there was a high incidence (88%) of optimum fixation.These results suggest that adequate ingrowth of bone is difficult to obtain between the socket and grafted bone in cementless THA.
西日本整形・災害外科学会の論文