No significant change in tibial torsion despite hinge fracture after high tibial osteotomy using patient-specific instruments

Purpose

Medial open wedge high tibial osteotomy (MOW-HTO) is an established treatment option for medial knee osteoarthritis or overload. However, using the conventional technique, unintended postoperative changes of the tibial torsion angle (TTA) were observed, potentially leading to secondary patellofemoral or gait disorders. This study aimed to investigate postoperative TTA changes after MOW-HTO performed with patient-specific instruments (PSI), with particular attention to the influence of hinge fracture.