| ObjectivesTo analyze the prevalence of dental fluorosis in children aged 8-12 years in drinking water-type fluorosis area in Gansu Province from 2008 to 2017,and to compare the fluoride ion concentration of drinking water in drinking water to evaluate the effect of water-reducing and fluoride-reducing measures in drinking water-type fluorosis area in Gansu Province.To provide reference for improving the prevention and control measures and strategies of fluorosis in Gansu Province.MethodsUsing the data of the national fluorosis monitoring project,through the methods of historical data compilation and on-site monitoring,investigate the general situation of the target population,the condition of dental fluorosis and monitor the fluoride concentration of water in the county(district,city)abundance and dry season,analyze Gansu The prevalence of dental fluorosis(total prevalence,gender prevalence,age prevalence,standardized prevalence,etc.)in children with drinking water-type fluorosis(8-12 years old),and year and year The relationship between water fluoride ion concentration compliance rate and village water reform rate was compared vertically.The relationship between fluoride ion concentration in the fluoride area and the prevalence of dental fluorosis in children(8-12 years old)was analyzed by single factor correlation.Results1.There was a statistically significant difference in the prevalence of dental fluorosis between the subjects during the monitoring period(c~2=516.348,P=0.000).With the implementation of water and fluoride reduction measures,children(8-12 years old)dental fluorosis The prevalence rate tends to decline,and the overall trend is low.2.The overall gender prevalence of dental fluorosis was statistically significant(c~2=5.114,P=0.012).The age-specific prevalence rate was statistically significant in2009,2015 and 2016(c~2=12.29,P=0.013;c~2=28.34,P=0.000;c~2=46.66,P=0.000).After standardization of gender and age factors in each year,it was found that except for 2016 and 2015,the difference in prevalence between the adjacent years was statistically significant(c~2=277.50,P=0.000;c~2=1157.01,P=0.000;c~2=340.54,P=0.000;c~2=45.11,P=0.000;c~2=531.46,P=0.000;c~2=1032.33,P=0.000).3.Correlation between fluoride ion concentration and the prevalence of dental fluorosis in children(8-12 years old)was compared by comparing the fluoride ion concentrations of 18 village waters monitored in the ward in 2014,2015,2016 and2017.Sexually weak(R~2=0.0108,0.0608,0.1682,0.0108).Conclusion1.From 2008 to 2017,the prevalence of dental fluorosis in children aged 8-12 years in drinking water-type fluorosis areas in Gansu Province tends to decline,and the overall trend is low.However,the prevalence of dental fluorosis varies among monitoring counties(districts and municipalities).2.The water reform rate of 18 monitoring counties(autonomous regions and municipalities)increased to 77.78%in 2017,and the water quality improvement was further implemented.3.The comprehensive prevention and control measures for water and fluoride reduction in drinking water-type fluorosis areas in Gansu Province are meaningful.The fluoride concentration of drinking water in the monitoring points is basically up to standard,eliminating moderate to severe epidemics.At the same time,it was found that this comprehensive prevention and control measures did not cover all wards,and some of the water-renovated facilities were not operating properly.4.Only the water fluoride concentration as a single water improvement effect evaluation and the indicators related to children's dental fluorosis are unreasonable.The total dietary fluoride intake and urinary fluoride changes should be comprehensively monitored,which can better reflect the actual situation. |
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