Many patients with advanced osteoarthritis and rheumatoid arthritis are afraid of artificial joint replacement. In addition to the fear of pain and bad results, there are two typical cognitive misconceptions that need to be corrected. Myth 1: Artificial joint replacement requires long-term bed rest. This argument is actually quite old-fashioned. Many years ago, doctors often asked patients to stay in bed for three months after artificial joint replacement due to the fear of postoperative joint dislocation. However, clinical practice has found that prolonged bed rest creates more problems, so this practice was abandoned a long time ago. Nowadays, patients are encouraged to get out of bed as early as possible after an artificial joint replacement. Generally speaking, as long as the patient’s physical condition permits, he or she can get out of bed one to two days after the operation and carry out functional rehabilitation training. Of course, some elderly people with severe osteoporosis, or patients with revision surgery need a longer period of bed rest. Myth 2: Artificial joints can only be used for 15 years. Such a misconception is daunting to many patients. In fact, this is a kind of out-of-context talk. The current international case follow-up shows that the 20-year survival rate of artificial joints is 85%. That is, about 85% of patients using artificial joints for more than 20 years, they use the prosthesis produced 20 years ago. Nowadays, the clinical application of the prosthesis, in all aspects, is far better than the prosthesis of 20 years ago, and the surgical technique is more emphasized on the protection of soft tissues, so it is indisputable that the survival time of artificial joints will also be longer. The artificial joint is the most effective artificial organ, and is one of the greatest breakthroughs in orthopedic surgery in the 20th century.