Abstract

Objective: To investigate the relationship between age, dental fluorosis and intelligence in children aged 8-12 in coal-burning fluorosis (CBF) area, Guizhou province.

Methods: A cross-sectional study was conducted to investigate the prevalence of dental fluorosis and intellectual level in 284 children (n=167 for CBF area, n=120 for control are) aged 8- 12 in Mar., 2015. The difference of intelligence level with different levels of dental fluorosis were analyzed.

Results: The prevalence rate of dental fluorosis of children in the endemic fluorosis area was 53.9%, which was significantly higher than that in the control (P<0.011), the dental fluorosis index was 0.59, which meant the area was an edge of epidemic area of endemic fluorosis. The standard score of Raven’s Standard Progressive Matrices (RSPM) of children in endemic area was lower than that in the control (Z=3.124, P=0.002). The intelligence level in endemic area was lower compared with the control and showed a significant difference in 12- year old group (Z=3.244 , P=0.001), no signif1cant relationship between intelligence level and levels of dental fluorosis was seen (H=5.057, P=0.281) . However, the degree of intelligence level negatively c0rrelated with age (r=-0.232, P=0.003).

Conclusion: The intelligence level of children livng in the endemic fluorosis area is lower and more further research need to be done to show the reason.

• Related Studies :

  • WITHDRAWN: Co-exposure effects of arsenic and fluoride on intelligence and oxidative stress in school-aged children: a cohort study.

    This article has been withdrawn at the request of the editor. The Publisher apologizes for any inconvenience this may cause. as of November 6, 2020 Highlights Pioneer biomonitoring study on rural children to address As and F- co-exposure. High dental Fluorosis found in relation to urinary As and F- levels in

  • Association of lifetime exposure to fluoride and cognitive functions in Chinese children: A pilot study

    Highlights Elevated fluoride concentrations in drinking water may be neurotoxic. We carried out a pilot study of 51 first-grade children with stable lifetime fluoride exposures. Moderate and severe fluorosis was associated with deficits in digit span total and backward scores. The dose-dependence underlying the association needs to be characterized in

  • Refinement Impairments of Verbal-Performance Intelligent Quotient in Children Exposed to Fluoride Produced by Coal Burning.

    To explore the relationship between total intelligence quotient (IQ), verbal intelligence quotient (VIQ), performance intelligence quotient (PIQ), and fluoride exposure in children aged 8–12 years in coal-burning fluorosis area of Dafang County, Guizhou Province, China. The Wechsler Intelligence Scale for Children Revised in China (WISC-CR) was used to test the total

  • European Commission: Opinions on the 2011 SCHER report on fluoridation for the Layman

    European Commission: Opinions on the 2011 SCHER report on fluoridation for the Layman About this publication on Fluoridation Online at https://ec.europa.eu/health/scientific_committees/opinions_layman/fluoridation/en/about.htm 1. Source for this Publication The texts in level 3 are directly sourced from “Critical review of any new evidence on the hazard profile, health effects, and human exposure to fluoride and the fluoridating

  • Effect of fluoride in drinking water on dental caries and IQ in children.

    The aim of this work was to evaluate the impact of fluoride exposure on the prevalence of dental caries and the intellectual ability of children. Method: In this cross sectional study, 161 children from 9 to 10 years of age were evaluated. The concentration of fluoride in drinking water and urine

• Related FAN Content :

  • Fluoride & IQ: 68 Studies

    As of February 2021, a total of 76 studies have investigated the relationship between fluoride and human intelligence. Of these investigations, 68 studies have found that elevated fluoride exposure is associated with reduced IQ in humans, while over 60 animal studies have found that fluoride exposure impairs the learning and/or

  • Fluoride Affects Learning & Memory in Animals

    An association between elevated fluoride exposure and reduced intelligence has now been observed in 65 IQ studies. Although a link between fluoride and intelligence might initially seem surprising or random, it is actually consistent with a large body of animal research. This animal research includes the following 45 studies (out

  • NRC (2006): Fluoride's Neurotoxicity and Neurobehavioral Effects

    The NRC's analysis on fluoride and the brain.

  • Diagnostic Criteria for Dental Fluorosis: The TSIF ("Total Surface Index of Fluorosis")

    The traditional criteria (the "Dean Index") for diagnosing dental fluorosis was developed in the first half of the 20th century by H. Trendley Dean. While the Dean Index is still widely used in surveys of fluorosis -- including the CDC's national surveys of fluorosis in the United States -- dental

  • Severe Dental Fluorosis: Perception and Psychological Impact

    [caption id="attachment_8879" align="aligncenter" width="550"] Severe fluorosis - Photograph by David Kennedy, DDS[/caption] In its severe forms, dental fluorosis causes highly disfiguring brown and black staining of the teeth, which can cause chronic embarrassment and social anxiety for the impacted child. In 1984, a panel from the National Institute of Mental Health (NIMH) warned