1. Department of Nature-Inspired Nanoconvergence Systems
2. Korea Institute of Machinery and Materials
3. Daejeon 34103
4. Republic of Korea
5. Department of Dental Materials
6. Department of Otorhinolaryngology-Head and Neck Surgery
7. Biomedical Research Institute
8. Seoul National University Hospital
9. Seoul
10. School of Dentistry
11. Kyung Hee University
12. Seoul 02447