1. Department of Cariology and Endodontology, Peking University School and Hospital of Stomatology, Beijing, People’s Republic of China
2. National Engineering Laboratory for Digital and Material Technology of Stomatology, NMPA Key Laboratory for Dental Materials, Beijing Laboratory of Biomedical Materials, Peking University School and Hospital of Stomatology, Beijing, People’s Republic of China
3. Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, People’s Republic of China