1. Centre of Digital Dentistry, Peking University School and Hospital of Stomatology, Beijing, People’s Republic of China
2. Department of Prosthodontics, Peking University School and Hospital of Stomatology
3. National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, People’s Republic of China
4. Research Centre of Engineering and Technology for Digital Dentistry of Ministry of Health, Beijing, People’s Republic of China
5. Beijing Key Laboratory of Digital Stomatology, Beijing, People’s Republic of China