Fig. 2From: Validation of a preoperative formula to estimate postoperative pelvic sagittal alignment and mobility before performing total hip arthroplasty for patients with hip osteoarthritisLateral radiographs of a patient in the standing (left) and sitting (right) positions. Illustration of the spinopelvic parameters. TK, thoracic kyphosis angle; LL, lumbar lordosis angle; SS, sacral slope; PI, pelvic incidenceBack to article page