2012•Journal of environmental healthRequires access
Study on the Situation of the Endemic Fluorosis Control Efficiency after the Water Improvement in Qingtongxia City
LI Xiao-jun
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Abstract
Objective To evaluate the effects of water improvement aimed at eliminating the prevalence of dental fluorosis and skeletal fluorosis in endemic fluorosis areas of Qingtongxia,Ningxia.Methods By applying epidemiological sample survey methods,670 children were examined in dental fluorosis and 1 400 adults(25 years) were examined in skeletal fluorosis in Yesheng of Yesheng township,the water -improvement area where endemic fluorosis was seriously prevailed,Xinqiao of Daba township which was mild endemic fluorosis area,and Huashigou of Daba township which was non-water-improvement area.Results The fluoride content in drinking water of Yesheng,Xinqiao and Huashigou were (0.24±0.05),(0.32±0.07) and(1.03±0.19) mg/L.The dental fluorosis and skeletal fluorosis in water-improvenment areas increased significantly than that in non-water-improvement area(P0.05).Conclusion After water improvement,drinking water fluoride levels decrease,dental fluorosis is still prevalent in certain degree in the endemic fluorosis areas of Qingtongxia,Ningxia.