The medial patellofemoral ligament (MPFL) is one of the ligaments providing knee stability by keeping the patella (kneecap) in place. More specifically, it facilitates steady movement in the early stages of knee flexion as it connects from the femur (thigh bone) to the patella. It also prevents the patella from being dislocated laterally (outwards). The MPFL will require reconstruction if the patella dislocates and tears the ligament. The surgeon will use a tissue graft to replace the damaged ligament and restore normal knee mobility, relieve patient pain and prevent further dislocations. This is typically done as an arthroscopic surgery that requires a small incision and arthroscope (camera) to minimize muscle loss and damage. A surgeon may want to perform an open surgery instead of the arthroscopic option depending on the tear and accessibility.