*Mamoru Murakami1, Sara Komabashiri2, Sota Ono3, Kae Harada4, Yasuhiro Nishi4, Masahiro Nishimura4
(1. Removable Prosthodontics and Implant Dentistry, Kagoshima University Hospital, 2. Section of Dental Hygiene, Division of Clinical Technology, KagoshimaUniversity Hospita, 3. Kyushu branch, 4. Department of Oral and Maxillofacial Prosthodontics, Kagoshima University Graduate Schoo)