1. Institute of Stomatology, Nanjing Medical University, Nanjing, PR China
2. Department of Stomatology, Yancheng No.1 People's Hospital, Yancheng, PR China
3. Biomaterials Laboratory, Department of Materials Science and Engineering, Tsinghua University, Beijing, PR China
4. School of Mechanics, Taiyuan University of Technology, Taiyuan, PR China
5. Beijing Allgens Medical Science & Technology Co., Ltd, Beijing, PR China
6. Suzhou Institute, Southeast University, Suzhou, PR China