The patella rests inside of a groove in addition to the femur known as the trochlear groove. When you bend and straighten your knee, the patella moves backwards and forwards inside of this groove. Limit That which you carry. Inquire your partner to hold in hefty groceries and take out the rubbish. http://knee cap replacement https://www.theorthopaedicandpainpractice.com/knee-cap-replacement-understanding-the-basics-of-this-orthopaedic-surgery/