The patella rests inside of a groove along with the femur known as the trochlear groove. Any time you bend and straighten your knee, the patella moves back and forth within this groove. X-rays. X-rays present photos of dense buildings, for example bone. Your health care provider will purchase X-rays from numerous http://knee cap replacement https://www.theorthopaedicandpainpractice.com/knee-cap-replacement-understanding-the-basics-of-this-orthopaedic-surgery/