To evaluate the clinical and radiological results of valgus-flexion femoral osteotomy (VFFO) in childhood hip diseases.

A VFFO was performed in 15 cases of childhood hip disorders with femoral head deformity: LCP disease (8); chronic SCFE (3); AVN after DDH (2), septic hip (1), femur neck fracture (1). Clinically, we evaluated the pre-and postoperative range of motion (ROM), pain, leg length discrepancy, and limping. Radiological evaluation included the neck-shaft angle, status of the osteotomy site and congruency of the femoral head with the acetabulum. Posterior displacement of femoral epiphysis was also evaluated in SCFE.

An average 20.7° valgus and 23.0°, flexion osteotomy were performed. The average neck-shaft angle changed from 125.9° to 146.6°, The averaged ROM of the hip joint increased by 16.2° (flexion), 17.9° (abduction), 16.4° (adduction), 26.7° (internal rotation), and 15° (external rotation). Limitation of motion was greatly improved and the hip joint pain decreased.

A VFFO of the proximal femur cannot only eliminate pain by making the best joint congruity, but can also help with the remodeling of a deformed femoral head. Moreover, an increased ROM can make a so-called "Yangban-Dali" possible, which makes daily activity as a Korean more comfortable.