Optimal age for artificial knee replacement The age for artificial knee replacement is generally set at 60 years of age or older. This is because the patient is not as active as a young person and the joint is not as worn out, so the surgery can be performed at this time to meet the needs of daily life without the hassle of frequent replacements. However, the age is not absolute. If the knee pain is significant and conservative treatment is ineffective, the age can be relaxed. Is there an upper age limit? Theoretically, there is not. As long as the medical condition can tolerate the surgery, it can be replaced. However, the older the patient is, the worse the general condition of the body, the longer the patient has to endure the pain and the greater the risk of surgery. Therefore, in this era of emphasis on quality of life, early surgery is recommended if it becomes necessary to replace the knee joint. What factors are involved in the outcome of knee replacement surgery? The surgical technique is important to the success of a knee replacement surgery, but so is a rigorous rehabilitation plan with full patient cooperation. A well-designed joint that is not placed in the normal line of knee forces is bound to increase wear and tear on the prosthesis, shorten its life span, and make it more susceptible to conditions such as anterior knee pain and patellar dislocation. In addition, artificial knee replacement surgery requires a high level of sterility in the operating room, which means that the surgery is performed in a class 100 laminar flow operating room. In the event of infection, the replacement joint must be removed, so it is important to go to a major hospital. Nowadays, minimally invasive joint replacement can significantly improve surgical results. Even if the surgery is perfect, if the patient does not cooperate with the surgeon in rehabilitation exercises, or if the rehabilitation exercises are not scientific, the range of motion of the replaced knee joint will be limited and will not meet the requirements of life. Rehabilitation exercises are scientific and rigorous and must follow a scientific approach, otherwise they will not achieve the desired results. The psychological factors of the patient are also important. Pre-operative communication between the doctor, patient and family is very important. The determination to do the surgery has to be made by the patient himself, and the patient has to respond to the surgery with a normal attitude before the surgery. The purpose of surgery is to relieve pain, improve knee function, and improve quality of life. Artificial joint replacement is now one of the most common orthopedic surgeries and is the most effective treatment for advanced osteoarthritis. Patients who have undergone joint replacement are able to resume a normal life and significantly improve their quality of life.