1 Division of Cariology and Restorative Dentistry, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki, 852-8588, Japan.
2 Division of Cariology and Restorative Dentistry, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1, Sakamoto, Nagasaki, 852-8588, Japan. kuboshisei@gmail.com.