Table 2.

Radiolucent line distribution in the different zones of the anteroposterior (AP) and laterolateral (LL) view of the tibia, and of the LL view of the femur, according to the Knee Society Roentgenographic Evaluation System [11]

	Zone	Number of radiolucent lines
Tibia AP	1	40
	4	37
	6	17
Tibia LL	1	34
	2	14
	3	14
Femur (LL)	1	40
	2	6
	3	2
	6	2