Restoring range of motion in reduced acetabular version by increasing femoral antetorsion – What about joint load?

BackgroundAcetabular retroversion results in reduced range of motion, and is thought to contribute femoroacetabular impingement. Severe can be corrected with a periacetabular osteotomy, which technically demanding intervention. In this study, we investigated whether increasing femoral antetorsion potential alternative restore the motion how approach would affect hip joint loading.MethodsSix different finite element models same subject were built from MRI used simulate load scenarios during stance phase, including healthy pathological configurations acetabular version torsion angles. The subject's gait was analysed our lab data as well reaction forces integrated into model. Hip abductor muscle localization magnitude loads determined.FindingsThe negative effects on flexion internal rotation reversed by anteversion. femur furthermore affected muscular functionality shortening moment arms muscles, resulting increased forces, loading.InterpretationEven though compensate for loss due version, rotational ostotomy proximal likely alter therefore increase load, conflicting goal long-term joint.