Postoperative changes in spinal rod contour in adolescent idiopathic scoliosis: an in vivo deformation study.

Study Design: Prospective case series.

Objective: To evaluate the change in spinal rod contour from before implantation to after surgical correction of thoracic curves in patients with adolescent idiopathic scoliosis.

Summary Of Background Data: With segmental pedicle screw spinal instrumentation and vertebral derotation, many authors have reported a loss of thoracic kyphosis postoperatively.