1. School of Material Science and Engineering
2. South China University of Technology
3. Guangzhou 510640
4. P. R. China
5. National Engineering Research Center for Tissue Restoration and Reconstruction
6. Department of Operative Dentistry and Endodontics
7. Guanghua School of Stomatology
8. Sun Yat-sen University & Guangdong Provincial Key Laboratory of Stomatology
9. Guangzhou 510055