*Hiromasa Hagino1, Yusuke Mihara1, Yuki Murotani1, Kotaro Higashi1, Kaori Enoki1, Ayaka Kimura1, Satoko Takeuchi1, Erisa Maeda1, Arisa tsurusaki1, Kodai Hatta1, Toshihito Takahashi1, Yoshinobu Maeda1, Kazunori Ikebe1
(1. Department of Removable Prosthodontics and Gerodontology,Osaka University Graduate School of Dentistory)