IMAMACHI Kenji^1,2, HATA Hironobu¹, UEDA Michihiro^2,3, RIN Shin³, NIIYAMA Takashi³, KITAGAWA Yoshimasa² (1.Dept. of Dentistry and Oral Surgery, National Hospital Organization, Hokkaido Cancer Center, Sapporo, Japan, 2.Dept. of Oral Diagnosis and Medicine, Graduate School of Dental Medicine, Hokkaido Univ.,Sapporo, Japan, 3.Dept. of Clinical Oral Oncology, National Hospital Organization, Hokkaido Cancer Center, Sapporo, Japan)

SONODA Itaru¹, KURASAWA Yasuhiro², MARUOKA Yutaka³, SEKIYA Hideki⁴, NEGISHI Akihide⁵, MUKOHYAMA Hitoshi⁶, SUGIZAKI Jumpei⁷, UENO Masayuki⁸, MICHIWAKI Yukihiro^1</s (1.Dept. of Oral Surgery, Japanese Red Cross Musashino Hospital, Tokyo, Japan, 2.Division of Maxillofacial Surgery, Graduate School, Tokyo Medical and Dental Univ., Tokyo, Japan, 3.Division of Maxillofacial Surgery, Center Hospital of National Center for Global Health and Medicine, Tokyo, Japan, 4.Dept. of Oral Surgery, Toho Univ. Omori Medical Center, Tokyo, Japan, 5.Dept. of OMS, National Hospital Organization Yokohama Medical Center, Kanagawa, Japan, 6.Dept. of Oral Surgery, Yokohama City Minato Red Cross Hospital, Kanagawa, Japan, 7.Dept. of Dentistry, Toranomon Hospital, Tokyo, Japan, 8.Dept. of Health Sciences, Saitama Prefectural Univ., Saitama, Japan)

NIHONGI Mayuko, KANKE Kosuke, YAGI Kotaro, TAKIZAWA Yurika, YUZAWA Yoshihiro, KAWAI Hiroki, HASEGAWA Yoshimichi, TSUYAMA Yasuhiko (Oral Surgery, Mitsui Memorial Hospital, Tokyo, Japan)

YUMOTO Megumi¹, IKEDA Tetsuya¹, OKUBO Masahiko¹, SATOMI Takafumi², SATO Tsuyoshi³, SAITO Koichiro¹ (1.Dept. of Otorhinolaryngology, Oral Surgery, Kyorin Univ. School of Medicine, Tokyo, Japan, 2.Dept. of OMS, School of Life Dentistry at Tokyo, Nippon Dental Univ., Tokyo, Japan, 3.Dept. of OMS, Saitama Medical Univ., Saitama, Japan)

MIYA Chihiro¹, SUZUKI Ryuta^1,2, KANEKO Tadayoshi¹, TONOGI Morio¹, IMAI Kenichi² (1.Nihon Univ. School of Dentistry Dental Hospital, Nihon Univ., Tokyo, Japan, 2.Microbiology, Nihon Univ. School of Dentistry)