Affiliation: | 1. Department of Clinical Technology, Division of Oral Hygiene, Niigata University Medical and Dental Hospital, Niigata, Japan;2. Oral Rehabilitation, Niigata University Medical and Dental Hospital, Niigata, Japan;3. Department of Oral Health and Welfare, Division of Oral Science for Health Promotion, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan;4. Department of Oral Health and Welfare, Division of Welfare, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan |