1. What is meant by artificial total knee arthroplasty. It is a treatment method that removes the joint surface that the body can no longer repair itself and replaces the damaged joint with an artificial joint component to correct the force line of the limb, eliminate knee pain, maintain joint stability, and restore knee function. 2.Effectiveness of artificial total knee joint replacement. Various causes of joint structure changes, the use of drug treatment alone can only partially relieve the pain symptoms, but can not change the changes in the joint structure, the cure is not the root cause. The purpose of artificial joint replacement is to relieve pain, stabilize the joint, correct deformities such as “rotundity” and “X” leg, and improve joint function so that joints that were previously stiff and limited in activity can be moved and their function greatly improved. After awakening from anesthesia after surgery, patients can carry out leg lifting exercises, and can stand on the ground three days after surgery, and most patients can recover after regular rehabilitation exercises. The majority of patients can return to the normal state in about 3 or 3 months. After arthroplasty, patients can return to normal work life and social activities, except for strenuous confrontational activities that doctors think cannot or are not recommended, patients can do various sports such as running, swimming, badminton, golf, cycling, horseback riding, dancing, Tai Chi, etc. 4, > 60 years old is the golden age of joint replacement. Some people think that the older you can’t do surgery, in fact, patients in their 60s is the “golden age” of artificial joint replacement, because the general health of patients at this age is good, hypertension, diabetes and coronary heart disease and other complications, and the post-operative patient strenuous exercise rarely, coupled with the life of the prosthesis 90% up to 20 years If the protection is good even longer, basically can maintain a lifetime without re-operation. 5. The main concerns of some elderly patients. (1) Fear of knee surface replacement surgery: It is wrong to think that the knee surface replacement will remove all of their joints and replace them with artificial joints. In fact, the surgery only removes one layer of the damaged part of the patient’s joint surface, and then an artificial joint of the same thickness can be installed on the surface of the excised lesion. (2) Worry about being inactive for a long time after surgery and needing care: After knee surface replacement, patients can walk for a short time with crutches on the first day after surgery, and the range of motion will increase day by day. One week after surgery, patients can wash their own faces and go to the toilet. One week after surgery, the patient can basically take care of himself. (3) Fear of surgical failure: However, the knee surface replacement surgery is based on instrument positioning, and every operation during the surgery is instrumented and regulated. In special patients, these peculiarities can be solved by careful preoperative design and intraoperative operational adjustments. (4) Years of use of the artificial joint after surgery: If the selected prosthesis is of good quality, combined with successful surgery and reasonable postoperative rehabilitation, the intactness rate of the artificial joint surface replacement can still be maintained at 90% after 20 years of use. Knee replacement surgery is actually a safe and effective procedure that can improve the quality of life of the patient to the maximum extent.