Fig. 4From: Prevalence of extra-articular tibia valga morphology in valgus knees and its implications for primary total knee arthroplastyJoint line convergence angle (JLCA). Close-up of the knee joint of a pre-operative, weightbearing lower-limb anteroposterior EOS digital radiograph is shown. The JLCA is the angle formed by the articular surfaces of the femur and tibiaBack to article page