1. Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Center for Stomatology, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, National Clinical Research Center for Oral Disease, Beijing Key Laboratory of Digital Stomatology Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health 22 Zhongguancun Avenue South, Haidian District Beijing 100081 P. R. China
2. Department of Oral & Cranio‐Maxillofacial Surgery, Shanghai Ninth People's Hospital, College of Stomatology Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology Shanghai 200011 P. R. China
3. Department of Stomatology, Xin Hua Hospital Shanghai Jiao Tong University School of Medicine Shanghai 200092 P. R. China
4. Shanghai University of Medicine and Health Sciences Shanghai 201318 P. R. China