1. The First Affiliated Hospital, Harbin Medical University, 23 Post Street, Nangang District, Harbin, Heilongjiang 150001, China
2. School of Stomatology, Harbin Medical University, 143 Yiman Street, Nangang District, Harbin, Heilongjiang 150001, China
3. Department of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, 30 Shuangqing Road, Haidian District, Beijing 100084, China