*Kenji Fueki¹, Yuta Manabe², Noriyuki Hoshi^3,4, 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)