P 113 – Do unilateral femoral derotation modify controlateral pelvic, hip and foot rotations in patients with cerebral plasy?

In single event multilevel surgery, femoral derotation is commonly performed. When the kinematic deviations are asymmetrical its indication is frequently one-sided. What are the effects of this procedure on the transverse kinematics of the pelvis and on the contralateral hip rotation and foot progression angles? Among 170 children with CP, operated, with at least a clinical gait analysis before and after surgery, 42 having had a unilateral femoral derotation are included. Patients with tibial derotation are excluded. This study focuses on "remote" effects on the pelvis and the contralateral side. Unilateral hip derotation in asymmetric patients is effective in reducing pelvic asymmetry without altering contralateral hip kinematics, thus affecting the angle of progression of the contralateral foot.