*Akina Ogawa1, Moe Sakurai1, Yasuyo Koide1,2, Masakazu Okubo1,2, Takshi Uchida2, Tomohiro Ishii1,2, Takashi Iida2, Michiharu Shimosaka2, Hitoshi Nishimura2, Osamu Komiyama2
(1. Department of Removable Prosthodontics and Geriatric Oral Health Nihon University School of Dentistry at Matsudo, 2. Department of Orofacial and Head Pain Clinic)