1. Department of Biomaterials Science; Osaka University Graduate School of Dentistry; Suita 565-0871 Japan
2. Department of Restorative Dentistry and Endodontology; Osaka University Graduate School of Dentistry; Suita 565-0871 Japan
3. Department of Biomaterials; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama 700-8525 Japan
4. Department of Advanced Functional Materials Science; Osaka University Graduate School of Dentistry; Suita 565-0871 Japan