*TAKASHI MATSUDA1, TAKAHARU GOTO1, TAKAHIRO KISHIMOTO2, KAN NAGAO1, TETSUO ICHIKAWA1, MASAYO OKAJIMA3
(1. Department of Prosthodontics and Oral Rehabilitation, Tokushima University Graduate School of Oral Sciences, 2. Department of Comprehensive Dentistry, Tokushima University Graduate School of Oral Sciences, 3. Chugoku-Shikoku Branch)