Background: Although abduction of the acetabular component is considered to predict factors for\npolyethylene wear attributable to osteolysis, other radiographic factors have yet to be elucidated.\nThe purpose of the present study was to evaluate whether anteversion or change in implantation\nangle of the acetabular component influences polyethylene linear wear by using standing and supine\nradiographs of the hip joint. Methods: Standing and supine plain anteroposterior radiographs\nof 62 hip joints in which cementless total hip arthroplasty was performed were examined for polyethylene\nlinear wear rate (mm/year), pelvic inclination, and radiological inclination and anatomic\nanteversion of the acetabular component. Results: All correlation coefficients of measurements\nof polyethylene linear wear, pelvic inclination angle, anatomical anteversion angle and radiological\ninclination angle were calculated highly. And by the three-dimensional numerical analysis,\nanatomic anteversion of the acetabular component had at least some effect on the degree of\npolyethylene wear. Conclusion: This study suggests that increased anteversion of the acetabular\ncomponent reduces polyethylene linear wear in metal-on-polyethylene total hiparthroplasty.
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