1. Endodontics Department of Stomatological Hospital, Jilin University, Changchun 130021, P. R. China
2. Polymeric and Soft Materials Laboratory, School of Chemical Engineering, and Advanced Institute of Materials Science, Changchun University of Technology, Changchun, 130012, P. R. China
3. Department of Burn Surgery, First Clinical Hospital of Bethune Medical, Jilin University, Changchun 130021, P. R. China
4. Endoscopy Center, First Clinical Hospital of Bethune Medical, Jilin University, Changchun 130021, P. R. China