1. Is joint replacement surgery scary? For osteoarthritis patients, joint replacement surgery is actually joint surface replacement surgery. Simply put, it is to remove the cartilage and bone spurs of the joint surface that are worn out and damaged, and then replace them with metal and ultra-high polymer polyethylene as the movable surfaces of the joints, so as to relieve the pain. Joint replacement surgery is not as serious as it is imagined, and it is a routine surgery for joint specialists. The operation time is usually about 1 hour, and some are even faster. 2.How to choose a knee prosthesis? There are both domestic and foreign manufacturers of knee prostheses, and each company has different types of knee prostheses, so there is a wide variety of knee joints available. Total knee joints can be categorized into CR knee prosthesis that retains the posterior cruciate ligament and PS knee prosthesis that does not retain the posterior cruciate ligament, both of which are suitable for patients undergoing initial knee replacement. Depending on whether the prosthetic spacer is movable or not, it is further categorized into movable spacer and fixed spacer knee prostheses. According to the different flexion angles of the prosthesis design, it is divided into high flexion prosthesis and normal prosthesis to meet different patient requirements. Which type of knee joint to choose should be decided by the doctor according to the condition. 3. What is the efficacy of knee replacement, i.e. to what extent can the joint function be restored after knee replacement? For patients with common osteoarthritis, the function is basically normal after the surgery, and they can perform household chores, go up and down stairs, travel, hike, climb mountains, and ride bicycles. The acquisition of these functions is the result of the joint efforts of the physician, the patient, and the rehabilitator, all three of which are indispensable. We should not force every patient to achieve perfect function, after all, some activities are no longer suitable for the 70-year-old, should be based on the patient’s own requirements to choose the purpose and method of exercise, do not have to force the patient to endure the pain of exercise. However, a range of motion of 0 to 100° is necessary and easy to achieve. 4.What is the cost of knee replacement? How many days will I be hospitalized? How many years can I use it? Depending on the type of artificial joint used, the cost of hospitalization (including the cost of the artificial joint, surgery, medication, and examination) varies. If an imported joint prosthesis is used, the hospitalization cost for unilateral knee replacement is about$50,000, and if a domestic joint prosthesis is used, the hospitalization cost for unilateral knee replacement is about$30,000. If the patient requires a higher quality of life after surgery or a special type of prosthesis due to medical conditions, the hospitalization cost will change accordingly. After hospitalization, we first check your physical condition, evaluate your cardiopulmonary function, and formulate a surgical plan, which takes about 2 to 3 days. After the surgery, if you recover well, you can be discharged after 1 week to a rehabilitation center or to perform functional exercises at home. Usually the hospitalization time for joint replacement surgery is 7~10 days. Artificial joints are made of metal and polymer plastics that follow the shape of human joints. These materials have undergone rigorous laboratory testing and are safe and reliable. Elderly people who do not exercise much can usually use them for more than 20 years. Of course, the service life of artificial joints also has a lot to do with the technical level of the doctor, experienced doctors installed joints of the right size, accurate location, close fit, the joint service life is naturally longer. 5.If the surgery fails, can I have another surgery? Yes, if the prosthesis loosens, becomes infected, or becomes unstable after the replacement surgery, it is possible to have another surgery. 6. Do I need to have a review after surgery? It is recommended to have a regular review after knee replacement surgery, through which the doctor will determine the improvement of the clinical condition, which will help guide the patient to better recovery and prolong the service life of the prosthesis. During the review, it is necessary to record the improvement of clinical symptoms, measure the angle of movement of the joints, conduct necessary imaging tests, and register the joint scoring scales (HSS score for knee, WOMAC health questionnaire, Harris score for hip).