*Yuya Iwamoto1,2,3, Mana Hasegawa2,3, Kensuke Yamamura3, Noritaka Fujii1,2
(1. Division of Dental Clinical Education, Niigata University Graduate School of Medical and Dental Sciences, 2. General Dentistry and Clinical Education Unit, Niigata University Medical and Dental Hospital, 3. Division of Oral Physiology, Niigata University Graduate School of Medical and Dental Sciences.)