Fig. 3

TT-PCL, the TT-PCL distance was determined as the mediolateral distance (blue dotted line) between one line (yellow line), passing the midpoint of the patellar tendon attached at the tibial tubercle (red asterisk) and perpendicular to the tibial posterior condylar line (blue line), and the other line (red line), passing the medial border of the PCL (red dot) and perpendicular to the tibial posterior condylar line (blue line). TT-PCL, tibial tubercle to posterior cruciate ligament; PCL, posterior cruciate ligament