The Third Outpatient Clinic of Peking University Stomatology Hospital is equipped with advanced diagnostic and therapeutic instruments, including digital imaging systems, oral endoscopes, advanced scalers, oral implantation machines, electronic root canal treatment machines, computerized colorimeters and so on. In order to prevent cross-infection, advanced sterilization equipment and isolation equipment are used. Sterilization measures are standardized and strictly managed, and one person one machine is used to eliminate cross-infection of hepatitis B, AIDS and other infectious diseases.