Patellar Instability:
What is patellar instability? Patellar instability means an unstable kneecap(Patella Bone). It occurs when the kneecap moves out of the groove(trochlear groove) at the end of the femur (thighbone). When you bend and straighten your knee from the joint, at a time the kneecap also moves up and down in a notch called the trochlear…