1.When should I have knee replacement surgery? Except for infection, any other conditions that cause serious damage to the knee joint and walking dysfunction can be considered for treatment by artificial joint replacement. Such as advanced osteoarthritis, knee tumor, knee ankylosis and rheumatoid, compulsory spondylitis, advanced knee trauma, etc. 2.What kind of material is the artificial joint made of? Will there be any rejection or allergic reaction? The artificial knee joint is mainly made of titanium alloy, cobalt-chromium-molybdenum alloy and other metal materials. These materials are very stable in the human body and do not decompose. There are only a few cases of metal allergy in artificial joints, which is very rare. 3. How long does the artificial knee surgery take? How long is the hospital stay? Depending on the surgeon’s surgical style and other factors, the surgery time varies from person to person. It usually takes about 2 hours. The hospital stay is usually 16 days. Normally, patients can walk with support in the hospital area one week after surgery and can move around in a small area one month after surgery. Three months after surgery can resume work. 4.How many years can the artificial knee joint be used? At present, according to the data summarizing the previous surgery cases, 10 years after the surgery, about 93% to 97% of the artificial joints are in normal use. 20 years after surgery, about 85% of the joints are functioning well, and until 30 years after surgery, more than 75% of the artificial joints are still functioning well. 5.Can elderly people with poor health have joint replacement? The vast majority of patients with osteoarthritis of the knee are elderly, and medical problems such as hypertension and diabetes are common. As long as appropriate adjustments are made after admission, their blood pressure and other indicators can be brought close to normal and the surgery can be performed successfully. 6. Do patients with knee tumors need joint replacement? Bone tumors that cause serious damage to the knee joint and cannot be preserved can be treated with artificial joint replacement, especially for malignant bone tumors.