We are excited to announce the latest HD addition to our animation library on MPFL (medial patellofemoral ligament) Reconstruction.?The kneecap or patella is a triangular-shaped free floating bone that is an important part of the knee joint. The patella rests in a groove on your femur called the trochlea , and glides smoothly in this groove when the knee bends and straightens. The medial patellofemoral ligament or MPFL is a ligament on the inside of the knee that helps to stabilize the patella in the trochlea by preventing it from moving or dislocating outward. Patellar instability is a condition in which the patella slips out of the trochlea, either partially, called subluxation, or fully, called dislocation. The MPFL is usually torn or stretched in the process, making future dislocations more likely. MPFL reconstruction is a commonly recommended surgical procedure for patients who have experienced repeated patellar dislocations. The surgery involves the reconstruction of the MPFL with the patient?s own tissue or with that of a donor in order to stabilize the knee and allow the patient to return to normal activity. illustrated script which can be shared, viewed or printed separately.