Imai N, et al. - Eighty-four female patients with bilateral developmental dysplasia of the hip who had undergone curved periacetabular osteotomy, were examined for the association between anatomical parameters of the pelvis such as pelvic incidence and anatomical pelvic tilt and functional parameters of the spine and pelvis such as the tilt of the anterior pelvic plane. Researchers obtained radiographs of the thoracic to lumbar spines and the pelvis in the standing position to determine spino-pelvic parameters before surgery. Using a preoperative three-dimensional pelvic model reconstructed from computed tomography images, they performed measurement of morphological parameters of the acetabulum such as the anterior center-edge (CE) angle, posterior CE angle, lateral CE angle, and acetabular anteversion. As per findings, the tilt of the pelvis seemed to be more reliant on anatomical-pelvic tilt, a morphological parameter of the pelvis, than on the bony coverage of the acetabulum such as lateral center-edge angle, anterior center-edge angle, posterior center-edge angle, and acetabular anteversion. In this study, for the first time investigation of the correlation between functional parameters of the pelvis and spine and morphological parameters of the pelvis and acetabulum besides pelvic incidence was done.