地方性氟中毒病区改水对中小学生龋患影响

目的 了解地方性氟中毒病区改水降氟对中、小学生龋患影响。方法 对奎屯氟中毒改水区２０２８名中、小学生进行口腔检查，记录其龋病情况，并与同区改水前、沿海城市及全国学生龋病流行病学最新报告对照。结果 改水后中、小学生患龋率较改水前略有升高，与对照区患龋率无差别，改水区中、小学生患龋率低于沿海城市及全国水平。结论 高氟区饮用水降氟不会直接引起患龋率升高，新疆奎屯改水区中、小学生患龋率处于全国较低水平。

Influence of water improvement in endemic dental fluorosis area on Caries in school boys and girls in Kuitun Xinjiang

Objective To understand the effect of water improvement in endemic fluorosis area on caries in school boys and girls.Methods The cavities of 2 028 school boys and girls were inspected.Their caries were recorded and compared with that of the coastal cities and the recent epidemic reports of students in China.Results The incidence of caries in school boys and girls was increased after water improvement but still lower than that of both the coastal cities and the average levels of student in China.There was no difference between water improvement group and the control group.Conclusions The decline of fluoride in endemic fluorosis area did not increase the level of caries directly.The incidence of caries in school boys and girls in Kuitun Xinjiang was low in China.