Artificial joints are made of alloy materials similar to human joints, with a smooth surface to reduce friction during activities, and are used to replace joints that have been diseased and cannot be restored to their normal state by their own repair. They are bonded to the human bone with an adhesive called “cement”, which provides a strong stability. Usually, after the artificial joint replacement, the patient can return to normal life, and the joint in the body will not affect the daily life, and there is no big impact on the MRI, CT and other examinations.