The patella rests in the groove along with the femur known as the trochlear groove. If you bend and straighten your knee, the patella moves backwards and forwards within this groove. This differs from a total knee replacement, wherein bone and cartilage from your entire joint are replaced. The effects of a http://knee cap replacement https://www.theorthopaedicandpainpractice.com/knee-cap-replacement-understanding-the-basics-of-this-orthopaedic-surgery/