Why the study?
Do radiographic parameters differ between children with Legg-Calvé-Perthes disease treated with a Thomas splint and matched controls at disease onset and skeletal maturity?
Do radiographic parameters differ between children with Legg-Calvé-Perthes disease treated with a Thomas splint and matched controls at disease onset and skeletal maturity?
In children with Legg-Calvé-Perthes disease, radiographic changes initially occur only in the affected hip, but by skeletal maturity, both hips show radiographic changes compared to controls.
Answers are grounded in this paper and cite their sources.
Bilateral acetabular changes at maturity in severe LCPD may warrant contralateral surveillance; leaves open systemic or compensatory mechanisms.
The purpose was to compare radiographic parameters with a sex-matched and age-matched control group at the onset of disease and at skeletal maturity. The study comprised 143 patients with Legg-Calvé-Perthes disease, treated using a Thomas splint. Wiberg's centre-edge angle and the acetabular index angle were applied. The age at diagnosis was 6.6 years with no difference between boys and girls. At the time of diagnosis, the centre-edge angle was decreased from 18° in the control group to 10° in the affected hip. The age at follow-up was 16 (SD 2) years for the boys and 15 (SD 3) years for the girls. At the time of skeletal maturity, the centre-edge angle was decreased and the acetabular index angle increased in the affected hip and the nonaffected hip in Stulberg class III/IV/V hips compared with the control group. Initially radiographic changes only occur on the affected hip. At skeletal maturity both hips show radiographic changes.
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Froberg et al. (2011) studied this question.
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