〇Saori Tamura^1,2, Saori Kojima^1,2, Tomoko Ohya¹, Kazuma Nakazawa³, Yukari Ishii³, Taiki Suzuki², Satoru Ogane², Junko Nakajima⁴, Ken Ishizaki⁵, Takeshi Nomura^2,6, Nobuyuki Matsuura⁴ (1.Division of oral medicine,oral and maxillofacial surgery,Tokyo Dental College,Ichikawa general hospital, 2.Oral cancer center,Tokyo Dental College, 3.Department of Removable Prosthodontics and Gerodontology, Tokyo Dental College, 4.Department of oral medicine and hospital dentistry,Tokyo Dental College, 5.School of Medicine,International University of Health and Welfare Department of Oral Rehabilitation and Maxillofacial Surgery, 6.Department of oral oncology,oral and maxillofacial surgery,Tokyo Dental College)