*Takaharu Goto1, Shinji Fujiwara2, Takashi Matsuda1, Takahiro Kishimoto3, Tetsuo Ichikawa1
(1. Department of Prosthodontics and Oral Rehabilitation, Tokushima University Graduate School of Biomedical Sciences, 2. Mima City Koyadaira Municipal Medical Clinic, 3. Department of Comprehensive Dentistry, Tokushima University Graduate School of Biomedical Science)