1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050 P. R. China
2. University of Chinese Academy of Sciences; Beijing 100049 P. R. China
3. Department of Orthopedics; Shanghai Jiao Tong University Affiliated Sixth People's Hospital; Shanghai 200233 P. R. China
4. Shanghai Jiao Tong University Affiliated Sixth People's Hospital; School of Biomedical Engineering; Shanghai 200233 P. R. China