Patellar cartilage is normally like a smooth tarmac surface (of course, it actually looks like ceramic), patellar cartilage is the thickest part of all the cartilage in the human body, but even so patellar cartilage damage degeneration still has a great chance, because people in a half squat state, patellar cartilage needs to withstand about 7 times the weight of the pressure, in such a large pressure joint activities, cartilage is easy to damage, if the damage in the actual The human body is squatting, up and down the stairs and other actions when the front of the knee joint pain, or even a ringing sound. First, too much repetition of squatting and going up and down stairs movements, especially climbing, can deteriorate quickly. You should try to reduce doing this type of action, because these actions will exponentially increase the weight on the knee joint. Second, exercise the muscle strength of the thigh (mainly the quadriceps), because its enhancement can significantly reduce the pressure on the front of the knee joint (mainly the patellofemoral joint), enhance the stability of the knee joint, which can also play a role in protecting the patellar cartilage. The main clinical methods are isometric and isotonic contractions of the quadriceps (which can be properly resistant) and static squatting exercises (also known as zigzag stance). Third, long-term intermittent oral administration of drugs containing glucosamine or even chondroitin sulfate to supplement the main components needed for cartilage synthesis in the knee joint. Of course, the older the patient, the less effective such drugs will generally be, because the organism is also aging and the synthesis capacity is declining. However, clinical results show that most older people also have some effect. Fourth, intra-articular injections of hyaluronic acid-based drugs. This is also one of the cartilage components, but is more of an active component of normal joint fluid. There is a risk of pain, allergy, bleeding, and even intra-articular infection, but the incidence is clinically very low.