Fig. 2

Measurement of Coronal tibiofemoral subluxation (CTFS) and the maximum wear point of the proximal tibia (MWPPT) a-c The anterior–posterior (AP) standing knee X-ray and lateral X-ray of an anterior cruciate ligament-deficient (ACLD) patient (a-c). CTFS is defined as the distance between the tangent line to the outermost joint edge of the lateral condyle of the femur and the tangent line of the lateral tibial plateau (a). The red arrow indicates the maximum wear point of the proximal tibia. MWPPT% is recorded as the ratio between the distance from the maximum wear point to the anterior edge of the tibia (yellow dotted line) and the length of the medial tibial plateau (green dotted line) (c)