1. What is total knee arthroplasty? Artificial total knee arthroplasty emerged in the 1980s and is a revolutionary technique in contemporary orthopedics. The procedure incorporates contemporary surgical concepts and engineering techniques to replace the patient’s original diseased joint with an artificial joint, which can significantly improve the patient’s walking ability, daily activity function and reduce pain. 2.What is the most suitable age for total knee arthroplasty? According to the international and Chinese orthopedic consensus, the best time to receive a knee replacement is between the ages of 60 and 75. Receiving this surgery at this age will result in better surgical outcomes and improved quality of life. 3. Why is 60 to 75 years of age the best age for total knee replacement? Total knee replacement is mainly used to treat osteoarthritis of the knee joint, which is common in middle-aged and elderly people, while people aged 60 years and above have a high incidence of osteoarthritis, with a prevalence of more than 20%. Therefore, people in this age range should visit a regular hospital promptly if they experience symptoms such as knee pain and decreased mobility. In addition to the higher incidence, patients in this age group are also in better physical condition, which makes them tolerant of the surgery and better able to complete post-operative functional exercises, thus better able to enjoy the improved quality of daily life after surgery. 4. Should people under 60 years old receive total knee replacement? In general, patients under the age of 60 should receive replacement surgery as soon as possible if they have severe pain, limited function in daily activities, and have been formally diagnosed with a disease such as severe knee osteoarthritis. Since the severity of knee disease tends to increase with age, avoiding and delaying surgical treatment will only make the disease worse and make surgery more difficult. Therefore, timely surgery is the right choice. The key to eliminating the concerns of patients under the age of 60 and younger is to spread knowledge about the life of the prosthesis. According to numerous studies both domestically and internationally, more than 90% of knee prostheses last 20 years, 80% last 30 years, and 70% are still in good condition after 40 years of use. Therefore, younger patients can still undergo surgery with confidence. 5. Are patients over 75 years old suitable for knee replacement? Yes, sooner rather than later. Patients in their 70s and doctors in their 80s are often reluctant to do this, which is a real dilemma. As patients over the age of 75 years old grow older, their co-existing diseases such as hypertension, diabetes, cardiovascular disease and osteoporosis will increase and their physical quality will gradually decline, while knee diseases such as osteoarthritis will also gradually worsen. If the patient’s condition progresses to the point where he or she loses the ability to walk and has to be bedridden and has a large number of coexisting diseases, the risk of further surgery will be high. Therefore, people over 75 years of age should take advantage of the timing of surgery and undergo surgery as early as possible. Post-operative care and nutrition should be strengthened and rehabilitation should be carried out in a scientific and orderly manner in order to obtain better surgical results. In general, patients between the ages of 60 and 75 are the best candidates for total knee replacement. Patients in this age group have a higher incidence of osteoarthritis, are generally in better health, and will benefit more from total knee replacement and enjoy a better quality of life after the procedure. Patients in other age groups who are eligible for surgery should also undergo surgery in a timely manner.