Knee joint surface replacement, which involves an incision of about 7 to 10 cm, is a surgery that replaces the articular cartilage on the surface of the knee joint with a metal prosthesis, and is indicated for diseases such as osteoarthritis of the knee, traumatic arthritis of the knee, and synovitis of the knee joint. Knee joint surface replacement is an operation that removes aged and degenerated articular cartilage and installs a metal prosthesis on the surface of the joint, so that when the joint is flexed, the movement between the prosthesis substitutes for the movement between the articular cartilage, and thus reduces the pain of the knee joint, and the incision of the knee joint surface replacement is about 7~10cm. When patients suffer from osteoarthritis of the knee joint, traumatic arthritis of the knee joint and synovitis of the knee joint, they may feel localized swelling and pain in the knee joint, and in severe cases, they may experience limited or acute activities, so they can relieve the localized pain through the knee joint surface replacement surgery. If knee joint surface replacement is needed, please follow the doctor’s instructions for treatment.