1. Beijing Laboratory of Biomedical MaterialsDepartment of Geriatric DentistryPeking University School and Hospital of Stomatology Beijing 100081 P. R. China
2. Department of Dental Materials & Dental Medical Devices Testing CenterNational Engineering Laboratory for Digital and Material Technology of StomatologyPeking University School and Hospital of Stomatology Beijing 100081 P. R. China
3. State Key Laboratory of Metal Matrix CompositeSchool of Materials and Science TechnologyShanghai Jiaotong University Shanghai 200240 P. R. China
4. Department of PhysicsUniversity of Science and Technology Beijing Beijing 100083 P. R. China
5. Department of StomatologyUnion HospitalTongji Medical CollegeHuazhong University of Science and Technology Wuhan 430022 P. R. China
6. Department of Mechanics and Engineering ScienceCollege of EngineeringPeking University Beijing 100871 P. R. China
7. Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of Technology Beijing 100081 P. R. China
8. CAS Key Laboratory of Bio‐inspired Materials and Interfacial ScienceCAS Center for Excellence in NanoscienceTechnical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190 P. R. China