An epidemiological investigation of endemic fluorosis in Shandong Province in 2013 / 中华地方病学杂志

ABSTRACT

Objective To investigate the fluoride content in drinking water as well as the current status of endemic fluorosis in 5 counties of Shandong Province,in order to provide a scientific basis for making prevention and control strategies.Methods According to the survey data of fluoride content in drinking water in Shandong Province between 2005 to 2007,an epidemiological investigation was carried out in Mudan,Jiaxiang,Wucheng,Pingdu and Boxing Counties from September to November 2013.The fluoride content in drinking water and urine and dental fluorosis of children aged 8 to 12 were investigated in 3-4 major survey villages selected in the five counties.The fluoride content in drinking water was detected by fluoride ion selective electrode method,and dental fluorosis was diagnosed by Deans method.Results Fifty-eight drinking water samples were investigated in 16 villages of the five counties.Water fluorine content in Wucheng,Mudan,Pingdu,Boxing and Jiaxiang counties was 4.14,3.84,1.83,1.33 and 0.43 mg/L,respectively.There were 4 counties' fluorine content exceeding the national standard (1.20 mg/L) except Jiaxiang County.The exceeding rate was 100％ in Wucheng and Mudan counties.Urine fluorine content of 320 children aged 8 to 12 in Wucheng,Mudan,Boxing,Pingdu and Jiaxiang counties was 4.51,4.62,1.82,1.30,1.01 mg/L respectively;the total detection rate of dental fluorosis of 574 children was 61.85％ (355/574),the rate of dental damage was 12.89％ (74/574),and dental fluorosis index was 1.27;the detection rate of dental fluorosis in Wucheng,Mudan,Boxing,Pingdu and Jiaxiang Counties was 90.18％ (101/112),97.73％ (86/88),62.22％ (84/135),54.90％ (28/51) and 29.79％ (56/188),respectively.Conclusions The exceeding rate of water fluorine content is very high in 5 counties of severe endenic fluorosis areas in Shandong Province.The urinary fluorine level of the population is still high and the prevalence of dental fluorosis of children is high.Endemic fluorosis in Shandong Province has not yet been effectively controlled,control situation is still grim.