The Medial Patellofemeral Ligament (MPFL) attaches the kneecap (patella) to the inner part of the knee. It helps stabilize the kneecap as the knee moves, preventing it from moving or dislocating outward.


The MFPL is most commonly injured when the kneecap is dislocated. Patients with an underlying abnormality of the knee, ligament laxity or weak leg muscles are at an increased risk for patella dislocations. Individuals who play sports or are involved in activities that involve pivoting are also at high risk.


Most first time MPFL injuries can be treated non-surgically with NSAIDs and immobilization. It’s then followed by physical therapy to strengthen the muscles around the knee. Your physician may recommend surgery if the injury is more severe, or if there are small pieces of detached bone or cartilage in the knee. MFPL reconstruction is often recommended for patients who experience repeated kneecap dislocations.

Depending on the patient’s individual condition, knee surgeons will either directly repair the ligament, or reconstruct the ligament. Surgeons will use a graft from another ligament in the patient’s own body or with that of a donor. This will provide stabilization to the knee and will allow the patient to return to normal activity.

Typically, MPFL reconstruction is performed at an outpatient facility. The knee will be immobilized while walking and standing for a period of six weeks, followed by a program of physical therapy. Patients usually return to normal activity after a period of four to six months.

To learn more about MPFL injuries and reconstruction, watch the video below.