Department of Endodontics, Nihon University School of Dentistry, Tokyo, Japan
Yoshimasa Takeuchi
Division of Dental Education, Dental Research Center, Nihon University School of Dentistry, Tokyo, Japan Department of Comprehensive Dentistry and Clinical Education, Nihon University School of Dentistry, Tokyo, Japan
This is an open-access article distributed under the terms of Creative Commons Attribution License 4.0 (CCBY 4.0), which allows users to distribute and copy the material in any format so long as attribution is given to the Japan Prosthodontic Society. https://creativecommons.org/licenses/by/4.0/
