1. Department of Fixed Prosthodontics, Nihon University School of Dentistry
2. Division of Biomaterials Science, Dental Research Center, Nihon University School of Dentistry
3. Department of Comprehensive Dentistry and Clinical Education, Nihon University School of Dentistry
4. The Nippon Dental University College at Tokyo, The Nippon Dental University
5. Department of Anatomy and Functional Restorations, Integrated Health Sciences, Hiroshima University Graduate School of Biomedical and Health Sciences