Fig. 3

Tibial anatomical parameters. Figure 3.1 TT-PCL distance: the distance between the lines which were simultaneously perpendicular to tPCL and passing through the projection of the medial border of the posterior cruciate ligament insertion (b) and the projection of the midpoint of the patellar tendon’s attachment (a) respectively. The medial and lateral borders of the posterior cruciate ligament insertion (b and c). Figure 3.2 TW: the distance between the lines that were perpendicular to the tPCL and tangent to the tibial medial–lateral borders (d and e); TTL distance: the distance between the projection of the midpoint of the patellar tendon’s attachment (a) and the medial border of the proximal tibia (d). Fig. 3.3 PCLL distance: the distance between the projection of the medial border of the posterior tibial condyle notch (b) and the lateral border of the proximal tibia (e)