1. State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China
2. Department of Ultrasonography, West China Second University Hospital, Sichuan University, Chengdu 610044, Sichuan, China
3. Department of Stomatology, The First Medical Centre, Chinese PLA General Hospital, Beijing 100853, China
4. School of Materials Science & Engineering, Sichuan University, Chengdu 610065, Sichuan, China
5. College of Geography and Biological Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, Jiangsu, China
6. Sichuan Provincial Engineering Research Center of Oral Biomaterials, Chengdu 610041, Sichuan, China