The second outpatient department of Peking University Stomatological Hospital implements the same quality control and charging standards as Peking University Stomatological Hospital. At present, there are 50 experts and doctors at all levels, 42 chairs for comprehensive oral therapy, and clinical departments such as periodontics, endodontics, orthodontics, prosthodontics and comprehensive oral therapy. In addition to conventional treatments such as tooth washing, tooth filling, tooth extraction, orthodontics and dental impaction, invisible lingual orthodontics and all-ceramic crown restoration are also carried out. As the periodontal disease center of Peking University-Hong Kong University, the outpatient department has rich experience and strong technical support in professional fields such as periodontal treatment and dental implantation.