WALK THE LINE: ORIENTATING THE TIBIAL COMPONENT ALONG THE ANATOMICAL TIBIAL AXIS MAY RESULT IN PATELLO-FEMORAL DYSFUNCTION FOLLOWING TOTAL KNEE REPLACEMENT

Introduction: Optimal rotational alignment of the tibial component is important for good functional outcome following total knee replacement. Internal rotation of the tibial component has been associated with patella-femoral problems. A commonly used rotational reference is the medial 1/3 and lateral 2/3 tuberosity axis (MTA). Another commonly used axis is the Anatomical Tibial Axis (ATA). We sought to compare the variation between these axes.