4/23/2024 0 Comments Normal hip xray children![]() Hilgenreiner’s angle (HTE) is routinely used for follow up on pelvic X-ray to assess the bony acetabular coverage and guide surgeons in their decision if further surgical correction is necessary. Despite improvements in early detection and management, residual hip dysplasia (RHD) occurs in 3.5–17% of cases and is a recognised risk factor for secondary osteoarthritis. Treatments of this paediatric disease range from conservative closed reduction to open surgical reduction. It is one of the most frequent encountered congenital musculo-skeletal disorders among children. This newly introduced ratio seems to be a helpful tool to orientate the further treatment in children presenting borderline RHD.ĭevelopmental dysplasia of the hip (DDH) is defined as insufficient acetabular coverage of the femoral head. The acetabular angle ratio was statistically significantly increased in the hips with RHD with a mean value of 7.1 ± 4.7 compared to the hips in the control group presenting a mean value of 2.1 ± 1.9 ( p < 0.00001). The normal upper limit for this acetabular angle ratio was extrapolated from the published normal values of cartilaginous HTE and bony HTE in children. They were compared by introducing a new ratio calculated from the square of cartilaginous HTE above the bony HTE on frontal MRI. Group 2 included 27 hips with a HTE < 20°. ![]() Group 1 included 31 hips with RHD defined by a bony HTE > 20°. This study retrospectively compares the bony and the cartilaginous acetabular angle of Hilgenreiner (HTE) of 60 paediatric hips on pelvic MRI separated in two groups. In case of residual hip dysplasia (RHD) in children, pelvic radiographs are sometimes insufficient to precisely evaluate the entire coverage of the femoral head, when trying to decide on the need for further reconstructive procedures. ![]()
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