*Takafumi Shimada1, Saori Yonezawa1, Chihiro Kaneko1, Ryo Ito1, Hiroshi Akasaka2, Naoki Ishizuka2, Tetsuya Maeda2, Takuya Kobayashi1
(1. Division of Removable Prosthodontics School of Dentistry Iwate Medical University, 2. Division of Neurology and Gerontology, Department of Internal Medicine, School of Medicine, Iwate Medical University)