*Yukako Matsuda1, Takayuki Kusunoki1, Hiroki Morioka1, Takashi Iida2, Jin Magara3, Kazuya Takahashi1, Akiko Shimada4
(1. Department of Geriatric Dentistry Osaka Dental University, 2. Department of Oral Function and Fixed Prosthodontics Nihon University School of Dentistry at Matsudo, 3. Unit of Dysphagia Rehabilitation, Niigata University Medical and Dental Hospital, 4. Department of Oral Health Sciences Faculty of Health Sciences Osaka Dental University)