The patella rests in the groove along with the femur called the trochlear groove. Any time you bend and straighten your knee, the patella moves forwards and backwards inside of this groove. Operation is an option when nonsurgical treatment has unsuccessful. Quite a few types of surgical treatments are available. This is https://knee-cap-replacement36789.blogspothub.com/33297502/getting-my-knee-cap-replacement-to-work