作者单位:Nippon Dent Univ Tokyo, Sch Life Dent Tokyo, Res Ctr Odontol, Chiyoda Ku, 1-9-20 Fujimi Cho, Tokyo[1]Nippon Dent Univ Tokyo, Sch Life Dent Tokyo, Dept Physiol, Chiyoda Ku, 1-9-20 Fujimi Cho, Tokyo[2]Azabu Univ, Sch Life & Environm Sci, Dept Life & Food Sci, Lab Food & Physiol Sci,Chuo Ku, 1-17-71[3]