Fig. 2From: Tibiofemoral joint contact area and stress after single-bundle anterior cruciate ligament reconstruction with transtibial versus anteromedial portal drilling techniquesThe experimental testing system (a sensor was calibrated according to the standardized protocols provided by the manufacturer (a), a left knee mounted onto the machine (b), a film was carefully inserted into the joint and then spread on top of the cartilage and the meniscus (c, d)) presented in this study with a left kneeBack to article page