The knee joint is a crucial component of the lower extremity mechanical axis in the human body. In orthopedics, proper alignment of the lower extremity is essential for normal joint function, muscle development, biomechanics, and dynamic balance.
The MCL is a ligament that links the shinbone (tibia) and thighbone (femur), and is located on the inner aspect of the knee. It is an extra-articular ligament (not located inside the knee joint), and as a result has a good blood supply.
ACL knee injuries are among the most common injuries for athletes. The ACL (anterior cruciate ligament) is one of four ligaments that make up the knee joint and is responsible for keeping the shinbone (tibia) from sliding forward on the thigh bone (femur)