[1] Tokyo Nippon Dent Univ, Dept Endodont & Operat Dent, Sch Life Dent Tokyo, Chiyoda Ku, Tokyo 1028159, Japan
[2] Tokyo Med & Dent Univ, Grad Sch, Dept Hard Tissue Engn, Sect Periodontol, Tokyo, Japan
[3] Nippon Dent Univ Tokyo, Dent Hosp, Div Gen Dent, Tokyo, Japan
[4] Nippon Dent Univ Tokyo, Res Ctr Odontol, Tokyo, Japan
[5] Tokyo Womens Med Univ, Inst Adv Biomed Engn & Sci, Tokyo, Japan
[6] Tokyo Med & Dent Univ, Global Ctr Excellence Program, Int Res Ctr Mol Sci Tooth & Bone Dis, Tokyo, Japan