1. Key Laboratory of Ion Beam Bioengineering; Hefei Institutes of Physical Science; Chinese Academy of Sciences and Anhui Province; Hefei 230031 P. R. China
2. University of Science and Technology of China; Hefei 230026 P. R. China
3. Department of Dental Implant Center; Stomatologic Hospital and College; Key Laboratory of Oral Diseases Research of Anhui Province; Anhui Medical University; Hefei 230032 P. R. China
4. School of Life Sciences; Anhui Agricultural University; Hefei 230036 P. R. China
5. High Magnetic Field Laboratory; Hefei Institutes of Physical Science; Chinese Academy of Sciences; Hefei Anhui 230031 P. R. China
6. Key Laboratory of Materials Physics; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031 P. R. China
7. Department of Periodontics and Oral Medicine; Department of Biomedical Engineering; University of Michigan; Ann Arbor MI 48109 USA