1. State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
2. National Center for Stomatology, Sichuan University, Chengdu 610041, China
3. National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610041, China
4. Department of Periodontics, West China School & Hospital of Stomatology, Sichuan University, Chengdu 610041, China
5. National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610065, China