For young and middle-aged patients with advanced ischemic necrosis of the femoral head (stage III or IV), should they undergo artificial total hip replacement? The answer is yes: as long as it has reached the advanced stage of osteonecrosis and the symptoms are obvious, artificial joint replacement surgery can be performed. This is because: 1, from the artificial joint development history, the modern artificial joint from the late 1960s, the development of so far has been more than 50 years of history, the early life of the artificial joint is how long? Including the operator has no idea, therefore, to determine the age of artificial joint replacement surgery, should be more than 65 years old, so that according to the average life expectancy of the population at that time (75 years old), the artificial joint life expectancy of more than ten years, it can make the vast majority of patients to use to life. Later on, long-term clinical results confirmed that after artificial joint replacement surgery, the majority of patients can use it for more than twenty years. Therefore, for some middle-aged and elderly patients (between 55-65 years old), artificial joint replacement is also used to relieve their pain, and the clinical results are also very good. The vast majority of patients are able to use it for more than twenty years. Therefore, the age limit of surgery is constantly advancing. 2, from the social level, young people are in the golden period of their lives, in the most critical period of learning, life, employment, marriage, family, career, if suffering from ischemic necrosis of the femoral head disease pain and suffering, will inevitably make their own trajectory of life has changed a great deal, and will not have a good life and work. Therefore, the disease should be relieved as early as possible so that one can lead a normal life, return to the society, create greater value, and strive for better life development. It is of great significance to oneself, one’s family and society. 3. From the technical level, a. The development of modern artificial joints has been very good so far, no matter the prosthesis design, material, processing technology and long-term clinical results. Many artificial joint prostheses have a long service life (85% of patients can use it for more than 20 years) in the long-term clinical follow-up. The artificial joint prosthesis we use now is more advanced and durable than the previous generation of prosthesis. b. The operating room of our surgery is cleaner now, which can greatly reduce the infection rate of artificial joint replacement surgery, even lower than the infection rate in foreign countries. c. The surgical instruments we use in our surgery are very matching and smooth, which can guarantee the surgery to be carried out smoothly. d. Our surgical techniques now are much more exquisite than our predecessors. e. The surgical technique of our surgery is much better than our predecessors. f. Our surgical technique is much better than our predecessors, which is much better than our predecessors. g. Our surgical techniques are much better than our predecessors. d. Our current surgical techniques are much more sophisticated than those of our predecessors, and the success rate of surgery is extremely high. e. Even if there are problems with the artificial joints after a certain number of years of use after the artificial joint replacement surgery, the majority of the patients will be able to return to a normal life again even with the current revision techniques. In conclusion, if the osteonecrosis is already in the advanced stage, age is not the main factor to consider whether the artificial joint replacement surgery should be performed or not, but the decision should be made according to the condition. It is important to make a decision based on the patient’s condition, so that the patient can be relieved of the pain as soon as possible, return to the society and resume a normal life.