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为探讨饮水氟化物和钙含量及其比值与地方性氟中毒的关系。本文报告了济宁市地方性氟中毒病区和非病区居民生活饮用水中Ｆ－和Ｃａ２＋含量，并对当地１１６０名１１～１５岁的中学生氟斑牙患病情况进行了调查，结果无论病区还是非病区居民饮水中Ｆ－和Ｃａ２＋含量均呈负相关关系（Ｐ＜０．０１）；病区和非病区居民饮水中Ｆ－和Ｃａ２＋含量分别为３．０６±１．２２ｍｇ／Ｌ，１１２．７０±５６．６０ｍｇ／Ｌ和０．７８±０．４０ｍｇ／Ｌ，２５０．２６±１３０．６８ｍｇ／Ｌ（Ｐ均＜０．０１）。病区和非病区中学生氟斑牙患病率分别为７６．１％和９．５％（Ｐ＜０．０１）。表示地方性氟中毒病区为高Ｆ－、低Ｃａ２＋及高Ｆ－／Ｃａ２＋型饮水，非病区为低Ｆ－、高Ｃａ２＋及低Ｆ－／Ｃａ２＋型饮水。
To explore the relationship between drinking water fluoride and calcium content and its ratio and endemic fluorosis. This paper reports the content of F- and Ca2 + in drinking water of endemic fluorosis and non-ward inhabitants in Jining, and investigates the prevalence of dental fluorosis among 1160 middle school students aged 11-15 years in 1160 localities. (P <0.01). The contents of F- and Ca2 + in drinking water of residents in non-ward and ward were respectively 3.06 ± 1.22mg / L, 112.70 ± 56.60 mg / L and 0.78 ± 0.40 mg / L, and 250.26 ± 130.68 mg / L respectively (all P <0.01). The prevalence rates of dental fluorosis in ward and non-ward middle school students were 76.1% and 9.5% respectively (P <0.01). The areas with endemic fluorosis were high F-, low Ca2 + and high F- / Ca2 + drinking water, and non-endemic areas were low F-, high Ca2 + and low F- / Ca2 + drinking water.