Dr. Guo Hangruitai, Dean of Stomatological Hospital199/KLOC-0 graduated from the Department of Stomatology, Fourth Military Medical University, and obtained a doctorate in prosthodontics from the School of Stomatology, Fourth Military Medical University. Practice experience: currently the president of ruitai Stomatological Hospital. 1993 Deputy Chief Physician, Department of Stomatology, Navy General Hospital. In 2003, he served as the medical director of the third outpatient department of Peking University Stomatological Hospital and the chief physician of the special needs clinic. 20 1 1 ren ruier dental hospital medical director. Academic achievements: His main research interests are color research of crowns and restoration materials, implant restoration, aesthetic restoration of discolored teeth and dentition, and precision denture restoration. In-depth study of tooth aesthetics, especially tooth color. Many professional exchanges at home and abroad every year, lectures are held all over the country, and new technologies, new materials and new therapies are promoted, which has certain influence in the fields of oral aesthetics and dental implant restoration. He has published more than 40 papers in professional magazines, translated the monograph Comparison of Oral Aesthetics, and edited 3 books. He presided over 6 scientific research projects and won 5 scientific and technological progress awards, including National Science and Technology Progress Award 1, Military Science and Technology Progress Award 1 and Military Science and Technology Progress Award 2. Member of Oral Plastic Surgery Branch of China Plastic Surgery Association, Beijing Prosthodontics Professional Committee, Beijing Dental Implant Professional Committee, and Academician of International Dental Association. ISCD certified trainer, consultant of west german stomatological college. AIC planting lecturer. Participated in more than 30 thousand cases of prosthetic treatment and achieved satisfactory results. Specialty: composite denture and implant restoration, oral aesthetic restoration. CAD/CAM minimally invasive repair.