An attempt to explain the causes of hip development normalization in children with developmental dislocation, whose parents discontinued non-surgical treatment

Despite the discontinuation of non-surgical treatment of children with DDH, the development of the hip after a few years or a decade or so turned out to be correct in about 50% of the subjects. The authors present examples and analyze the reasons for effective stimulation of the acetabulum roof and proximal femoral roof growth zones in these children. They emphasize that after a closed reduction, the femoral head does not press against the edge of the roof, thus allowing it to grow. Similarly, the growth zones of the proximal femur after reduction have become active again, and the femoral head has a spherical shape fitted to the acetabulum. However, in a few-year-old children with a developmental dislocation of the hip, the femoral head shows deformations similar to those observed in tibial epiphysis in Blount’s disease.