*Kenji Fueki1, Yuta Manabe2, Noriyuki Hoshi3,4, Rintaro Tomita4, Katsuhiko Kimoto4, ECCO project (1. Masticatory Function and Health Science, Tokyo Medical and Dental University, 2. Department of Dementia and Geriatric Medicine, Division of Clinical Science, Kanagawa Dental University School of Dentistry, 3. Department of Education Planning, Kanagawa Dental University, 4. Department of Fixed Prosthodontics, Kanagawa Dental University)