Fig. 3

a Articular contact distances (mean ± SD) on the medial and lateral femoral condyles and tibial surfaces of the TKA component. A “*” indicates that the contact distance is significantly different between the medial and lateral femoral condyles or tibial surfaces (p < 0.05). b Internal (+) and external (−) tibial rotations (mean ± SD) at all flexion intervals of the TKA knee. A “*” indicates that the internal tibial rotation due to articulations on the femoral condyles is significantly different from that due to articulations on tibial surfaces of the TKA component (p < 0.05)