@article{oai:mdu.repo.nii.ac.jp:00001198,
 author = {近藤, 武 and 笠原, 香 and 樋口, 寿英 and 中根, 卓 and 安藤, 三男},
 issue = {2},
 journal = {松本歯学},
 month = {Aug},
 note = {application/pdf, The aim of this study is to determine the threshold limit of fluoride naturally contained in drinking water. It is established that the threshold limit of fluoride in drinking water is less than 0.8 ppm in Japan. But this threshold has come under question, as some reseachers have reported the occurence of mild dental fluorosis caused by drinking water containing naturally less than 0.8 ppm of fluoride. In those reports it was difficult to determine what concentration of fluoride was in the water when the teeth calcified, because it was not required that such records be kept. It is most important to know the relationship between fluoride concentration in drinking water and teeth calcification period for deciding the threshold limit of fluoride. It is knwon that Omi village, which was studied, contains rich fluoride in water supplied by an artesian well. The community authority has started to supply new water which contains 0.6～0.7 ppm of fluoride since 1973. We have tried to determine the precise concentration of fluoride in the drinking water during the teeth calcification period of schoolchildren living in this village for 7 years. As a result, we did not have any changes in concentration by collecting the water samples twice a month by all year around.},
 pages = {170--175},
 title = {飲料水中フッ素の許容濃度に関する研究 第1編 麻積村の水道水中フッ素濃度},
 volume = {14},
 year = {1988}
}