Effect of Radical Hip Reconstruction in Children With Hip Subluxation on Sagittal Balance and Type of Vertical Posture: Mid-Term Results

Abstract

Background. Hip instability in the form of hip subluxation, regardless of its etiology, leads not only to the formation of excessive pelvic anteversion and lumbar hyperlordosis, but also to the early development of hip osteoarthritis. The lack of information in the world literature on possible changes in sagittal balance parameters in this category of patients after triple pelvic osteotomy requires such studies.

Aim of the study is to evaluate the spino-pelvic sagittal balance and the type of vertical posture in children with hip subluxation of different genesis after radical reconstructive intervention in the mid-term follow-up period.

Methods. The study is based on the analysis of clinical and X-ray results of 50 patients (50 hip joints) aged 10 to 17 years with hip subluxation operated on between 2018 and 2019. The patients were divided into two groups: group I consisted of 30 patients (30 hip joints) with Crowe type I dysplasia; group II consisted of 20 patients (20 hip joints) with Legg-Calvé-Perthes disease. All children underwent triple pelvic osteotomy.

Results. Different approaches to triple pelvic osteotomy in patients with hip instability of various genesis allowed to significantly affect the spino-pelvic sagittal balance and the type of vertical posture. In all patients there was a decrease in the sacral slope value, spino-sacral angle, the magnitude of lumbar lordosis, as well as a change in the sagittal vertical axis value from strongly negative to neutral.

Conclusion. Analysis of mid-term results of surgical treatment of children with hip instability in the form of hip subluxation and Legg-Calvé-Perthes disease using 3D modeling and prototyping of individual guides showed that the triple pelvic osteotomy leads to the reduction of both excessive pelvic anteversion and lumbar hyperlordosis, resulting in the transformation of physiologically disadvantageous hyperlordotic type of vertical posture into harmonious one.

Keywords

children / hip dysplasia / Legg-Calvé-Perthes disease / hip subluxation / spino-pelvis balance / triple pelvic osteotomy / 3D modeling

References

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Funding

Министерство здравоохранения Российской ФедерацииMinistry of Health of the Russian Federation(121031700122-6)

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