1. State Key Laboratory of Oral Diseases National Clinical Research Center for Oral Diseases West China Hospital of Stomatology Sichuan University Chengdu 610041 China
2. School of Chemical Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
3. Science and Technology Achievement Incubation Center Kunming Medical University Kunming 650500 China
4. Department of Mechanical Engineering The University of Hong Kong Hong Kong SAR China