*Tatsushi Naito1, Akiko Miyake2, Satoshi Komasa1, Yuichiro Tashiro1, Hideaki Sato3, Takuya Mino1, Kenji Maekawa1
(1. Department of Removable Prosthodontics and Occlusion, Osaka Dental University, 2. Department of Oral Health Engineering Faculty of health Sciences, Osaka Dental University, 3. Department of Mechanical Engineering, Faculty of Science and Engineering, Tokyo City University)