Patellofemoral arthritis occurs when the articular cartilage alongside the trochlear groove and on the underside with the patella wears down and gets inflamed. The destroyed bone and cartilage with the close of the femur is Lower absent. The top within your femur is Slash and resurfaced to fit the 1st http://knee cap replacement https://www.theorthopaedicandpainpractice.com/knee-cap-replacement-understanding-the-basics-of-this-orthopaedic-surgery/