[1] Tohoku Univ, Grad Sch Dent, Div Adv Prosthet Dent, Aoba Ku, 4-1 Seiryo Machi, Sendai, Miyagi 9808575, Japan
[2] Niigata Univ, Div Dysphagia Rehabil, Grad Sch Med & Dent Sci, Chuo Ku, 2-5274 Gakkocho Dori, Niigata 9518514, Japan
[3] Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Aoba Ku, Aramaki Aza Aoba 6-3, Sendai, Miyagi 9808578, Japan
[4] Tohoku Univ, Lab Redox Regulat, Grad Sch Dent, Aoba Ku, 4-1 Seiryo Machi, Sendai, Miyagi 9808575, Japan
[5] Kyushu Univ, Inst Mat Chem & Engn, Nishi Ku, CE41 744 Motooka, Fukuoka 8190395, Japan
[6] Tohoku Univ, Grad Sch Dent, Div Craniofacial Funct Engn, Aoba Ku, 4-1 Seiryo Machi, Sendai, Miyagi 9808575, Japan