2018: Effect of high fluoride and high iodine drinking water on the prevalence of dental fluorosis: Shenyang City

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2018: Effect of high fluoride and high iodine drinking water on the prevalence of dental fluorosis: Shenyang City

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Yu X - "Effect of high fluoride and high iodine drinking water on the prevalence of dental fluorosis among school-aged children in rural areas of Shenyang City" Chinese Journal of Public Health Engineering 17(5):696–697 (2018)

Objective:

To investigate the effect of high fluoride and iodine drinking water on the prevalence of dental fluorosis in rural school-age children in Shenyang.

Methods:

According to the level of fluoride and iodine in drinking water in rural areas of Shenyang, school-age children in three natural villages were selected as the research objects. They were high fluoride and high iodine group (the contents of fluoride and iodine in water were 2.91 mg/L and 271 μg/L) and high fluoride and appropriate iodine group (the contents of fluoride and iodine in water were 3.12 mg/L and 126 μg/L) and appropriate fluoride and iodine group (the contents of fluoride and iodine in water were 0.86 mg/L and 51.5 μg/L), 80 cases in each group. The early morning urine samples of children were collected, the fluorine content in urine was determined by electrode method, and the iodine content in urine was determined by catalytic kinetic spectrophotometry; The incidence of dental fluorosis, family economic situation, parents' education level and family nutrition knowledge score were recorded.

Results:

In the high fluoride and high iodine group, the urinary fluoride content was (2.67±1.42) mg/L and the urinary iodine content was (733.52±307.19) μg/L; In the high fluoride and iodine group, the urinary fluoride content was (2.85±1.50) mg/L and the urinary iodine content was (797.90±371.6) μg/L; In the appropriate fluoride and iodine group, the urinary fluoride content was (1.69±0.42) mg/L and the urinary iodine content was (307.13±149.20) μg/L; there were significant differences in urinary fluoride and urinary iodine contents among the three groups (all P<0.05). The urinary fluoride and urinary iodine contents of children in the high fluoride and appropriate iodine group were the highest, followed by the high fluoride and high iodine group, and the content of children in the appropriate fluoride and appropriate iodine group was the lowest. The dental fluorosis rate and dental fluorosis index of children in high fluoride and high iodine group and high fluoride and iodine group were significantly higher than those in fluoride and iodine group (all P<0.05) ; The dental fluorosis rate and dental fluorosis index of children in high fluoride and iodine group were significantly higher than those in high fluoride and [high] iodine group (all P<0.05). Correlation anal. showed that water fluoride content, family economic situation, parents' education level and family nutrition knowledge score were significantly correlated with the incidence of dental fluorosis in school-age children (P<0.05).

Conclusion:

The fluoride content in drinking water is pos. correlated with the occurrence of dental fluorosis in school-age children, and high iodine has a certain preventive effect on dental fluorosis, which may be related to the interaction between iodine ion and fluoride ion.
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