1. State-Key Laboratory for Mechanical Behavior of Materials
2. Xi’an Jiaotong University
3. Xi’an 710049
4. China
5. State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases
6. Center for Tissue Engineering, School of Stomatology
7. Fourth Military Medical University
8. Xi’an 710032