Abstract

The purpose - to identify the Х-ray anatomical features of the dislocated hip in children with arthrogryposis, to compare Х-ray and CT scans of hips in patients with arthrogryposis and DDH. Materials and methods. We examined the 98 X-rays and CT scans of the pelvis (120 hips) in children aged from 5 months to 7 years with a hip dislocation in arthrogryposis (main group) and DDH (control group). Results. Cranio-lateral displacement of the femoral head was less pronounced in the main group than in the control. Deficiency of the roof and anterior acetabular margin are typical for the comparison groups, but these changes are significantly less pronounced in the main group (p0,0001). Also revealed that the posterior acetabular margin developed significantly greater in the main group. For the patients in the main group up to 3 years, the pathological femoral antetorsion is not typical in contrast to the control group (p0,0001), however, it occurs in older age (p0,14). At the compared groups the true values of the NSA do not exceed the age norm. Conclusion. Examination protocol of the hip dislocation in children with arthrogryposis must include X-ray and CT of the pelvis for reliable evaluation of the femoral and acetabular component and preoperative planning.

Highlights

  • We examined the 98 X-rays and CT scans of the pelvis (120 hips) in children aged from 5 months to 7 years with a hip dislocation in arthrogryposis and DDH

  • Cranio-lateral displacement of the femoral head was less pronounced in the main group than in the control

  • Deficiency of the roof and anterior acetabular margin are typical for the comparison groups, but these changes are significantly less pronounced in the main group (p

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Summary

Материал и методы

Рентгенологическое исследование было проведено у 98 детей (120 ТБС) в возрасте от 5 месяцев до 7 лет, находившихся на лечении в ФГБУ «НИДОИ им. 3. Результаты рентгенологического обследования ТБС больного И., 5 лет, с диагнозом: врожденный диспластический маргинальный вывих левого бедра: а – рентгенограмма ТБС в прямой проекции (P – линия Перкинса, Н – линия Хильгенрейнера, α – шеечно-диафизарный угол, β – угол Шарпа, γ – индекс толщины дна вертлужной впадины, δ – индекс сферичности вертлужной впадины); б – МСКТ ТБС, горизонтальный срез (ε – угол фронтальной инклинации вертлужной впадины, стрелками указана разница в толщине дна вертлужной впадины); в – МСКТ ТБС, горизонтальный срез (О1 и О2 – центры головок бедренной кости, ПК1 и ПК2 – передние края вертлужных впадин, ЗК1 и ЗК2 – задние края вертлужных впадин, УПП – угол переднего покрытия, УЗП – угол заднего покрытия, УСП – угол суммарного покрытия); г – МСКТ ТБС, 3D-модель (ζ – угол сагиттальной инклинации вертлужной впадины).

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