Figure 1.

Measurement of tibia tuberosity‐trochlear groove (TT–TG) distance and tibial rotation relative to the femur (TRRF). (A) TT–TG distance: the distance between the axial section depicting the deepest part of the trochlear groove (a) and the center of the tibial tuberosity (b), while ensuring that the measurement was parallel to the posterior condylar axis of the femur; (B) TRRF on axial computed tomography scan: the angle (α) between the line (c) drawn through the posterior border of the proximal tibia and the line (d) drawn through the two most posterior points of the posterior femoral condyles. F, femur; T, tibia.