1. Key Laboratory of Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
2. School of Materials Science and Engineering, Peking University, Beijing 100871, China
3. School of Engineering Medicine, Beihang University, Beijing 100083, China
4. Stomatology Department, Peking University Third Hospital, Beijing 100191, China