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. Center of Craniofacial Orthodontics
7. Department of Oral and Maxillofacial Surgery
8. Department of Oral Surgery
9. Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology
10. State Key Laboratory of High Performance Ceramics and Superfine Microstructure
11. Shanghai Institute of Ceramics
12. Chinese Academy of Sciences
13. Shanghai 200050