Anteversion of the Acetabulum and Femoral Neck in Normals and in Patients with Osteoarthritis of the Hip

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Abstract
Anteversion of the acetabulum and of the femoral neck was determined by computed tomography in 47 adults with normal hips and in 39 patients with osteoarthritis. The normal anteversion of the acetabulum was 17 .+-. 6.degree. (mean .+-. SD) and of the femoral neck 13 .+-. 7.degree.. In the patients with osteoarthritis the femoral anteversion was on the average 6.degree. larger than in the normals, whereas no difference was revealed in the figures of acetabular anteversion. The relationship between the degree of femoral and of acetabular anteversion was calculated. No correlation was found in the normals or the patients. Consequently, the relationship between the anteversion of the femoral neck and of the acetabulum was poor in the patients as compared to controls; this apparently is a contributing factor to osteoarthritis due to poor adaptation of the femoral head to the acetabulum.

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