*Keiichi Yamamoto¹, Masahiko Sakaguchi², Akira Onishi³, Shinichiro Yokoyama⁴, Yusuke Matsui⁴, Wataru Yamamoto⁵, Hideo Onizawa³, Takayuki Fujii³, Koichi Murata³, Masao Tanaka³, Shunsuke BABA¹, Motomu Hashimoto⁶, Shuichi Matsuda³, Akio Morinobu³ (1. Osaka Dental University, 2. Osaka Electro-Communication University, 3. Kyoto University, 4. ORACLE, 5. Kurashiki Sweet Hospital, 6. Osaka Metropolitan University)