After the artificial knee replacement, will the patient be able to return to a normal state and live and work as an ordinary person? This question has always been the focus of patients and their families. In fact, if patients can follow medical advice and insist on effective rehabilitation exercises, such as straightening exercises and quadriceps exercises, after artificial knee replacement, they can generally recover to a good state. It is only because of the muscle strength exercises involved that the recovery time varies from patient to patient, with some patients taking up to six months to recover. However, patients can basically walk and squat like normal people after recovery, and even if they do not tell others that they have had a knee replacement, others will not be able to tell from the appearance and gait. However, it is worth noting that although the artificial knee replacement has solved all the problems of the affected leg, such as pain and improved mobility of the knee, there are still some movements that cannot be achieved, after all, the replacement is a mechanical artificial joint, which has a life span. The newer artificial knee joints often have cobalt-chromium-molybdenum alloy as the metal material and a polyethylene pad in the middle (this polyethylene pad is highly cross-linked or specially treated and often very wear-resistant), which can theoretically last 30 years. In addition, artificial joints are not the same as normal joints, so depending on the type of prosthesis, the angle of movement of the artificial joint is very different from that of a normal joint, and attention needs to be paid to the wear and tear of the joint. Most importantly, many patients are already able to bend their leg at a very small angle before surgery and, after evaluation by the surgeon, are no longer able to return to a large degree of bending. Such patients often end up with less than satisfactory results, even with artificial knee replacement surgery and post-operative rehabilitation. In other words, for all artificial knee replacement patients, only if the surgeon determines during surgery that a certain degree of bending can be achieved, such as 120 degrees, will the patient be allowed to train with the appropriate intensity of bending after surgery, and if this angle cannot be achieved during surgery, it will not be possible to train with postoperative rehabilitation. All in all, after the artificial knee replacement, the patient can basically resume normal gait and walking function, no different from normal people, but after all, it is not his own joint, so there are still some differences.