the knee's unhappy triad. tears of the acl, mcl, and medial meniscus. sports injury. labeled medically

lateral ligament medial torn unhappy triad knee injury acl mcl meniscus tear pain swelling instability surgery rehabilitation trauma cartilage joint strain sprain flexion extension rotation sports shock stability mri diagnosis recovery bracing therapy quadriceps mobility flexibility rupture repair function meniscectomy ligamentous strengthening conditioning overuse inflammation orthopedic stiffness healing knee#39aph39#s triad tears meniscus injury labeled medically severe involving twisting impacts