1. Department of Prosthodontics
2. Ninth People's Hospital affiliated to Shanghai Jiao Tong University
3. School of Medicine
4. Shanghai 200011
5. China
6. State Key Laboratory of High Performance Ceramics and Superfine Microstructure
7. Shanghai Institute of Ceramics
8. Chinese Academy of Sciences
9. Shanghai 200050
10. Oral Bioengineering Lab
11. Shanghai Research Institute of Stomatology
12. Shanghai Key Laboratory of Stomatology