The authors analyzed a consecutive series of 20 total hip arthroplasties performed using a cementless conical stem with shortening osteotomy combined with greater trochanter transfer in cases with a highly dislocated hip secondary to sequelae of a septic hip in childhood. Mean patient age was 47.3 years and the mean follow-up period was 3.4 years. An acetabular metal cup was inserted in 5 cases, and only a liner was inserted after cementing in 15 cases. Mean Harris hip score improved from 42.4 preoperatively to 84.2 at final follow-up. Mean leg lengthening was 36.5 mm, and time to greater trochanter union was 3.72 months. No complete radiolucent line of thickness >2 mm was observed in any case. These surgical methods produced satisfactory clinical and radiological results.
[Show abstract][Hide abstract] ABSTRACT: The aim of this study was to determine whether the ratio between the femoral head diameter and pelvic height in a Chinese population is the same as that found in Westerners.
Standard pelvic radiography was performed on a group of 187 Chinese adult subjects consisting of 81 males and 106 females with a mean age of 40 years (21-68 years). Femoral head diameter (vertical distance from the femoral head-neck junction to the highest point of the femoral head) and pelvic height (vertical distance from the highest point of the iliac crest to the edge of the ischial tuberosities) were measured.
There were significant differences between males and females (p < 0.001), and between persons of high height versus low height (p = 0.011) and medium height (p = 0.039). There were no significant differences between persons of different age (p = 0.244), body mass index (p = 0.091), or between persons of low- and medium-height groups (p = 0.69). The overall mean ratio between the femoral head diameter and pelvic height was 0.215 (0.173-0.249) with a 95 % CI = 0.214-0.217. The mean ratios in males and females were 0.221 (0.194-0.249) and 0.211 (0.173-0.238), respectively.
The mean ratio in Chinese population was similar to the reported ratio in a western population (about 1:5). We suggest that Chinese surgeons may be able to use the Crowe classification to classify patients with hip dysplasia.
European Journal of Orthopaedic Surgery & Traumatology 08/2013; 24(6). DOI:10.1007/s00590-013-1298-7 · 0.18 Impact Factor
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