Fluoride intake from meals served in daycare centres in municipalities with different fluoride concentrations in the water supply.
OBJECTIVE
The aim of this study was (1) to determine the fluoride content in the meals served to children aged up to 36 months in daycare centres of two municipalities with different levels of fluoride in the water supply, (2) to calculate the mean fluoride ingested daily by the children when consuming those meals and (3) to analyse the contribution of this consumption to the development of dental fluorosis.


METHODS
Samples of the meals served to the children were collected during a whole week. The fluoride content of the samples of solid foods and milk was analysed using an ion-specific electrode combined with reference electrode after diffusion facilitated by hexamethyldisiloxane. Samples of beverages were buffered with an equal volume of total ionic strength adjustment buffer and analysed using a combined electrode. The results were compared using the Mann-Whitney test.


RESULTS
Mean fluoride contents of the meals were of 0.204 +/- 0.179 and 0.322 +/- 0.242 microg F/mL (P < 0.05), respectively, in the municipalities with low and adequate fluoride content. Daily fluoride intake in the former was 0.013 +/- 0.003 mg/kg body weight/day and in the latter was 0.012 +/- 0.001 mg/kg body weight/day (P > 0.05).


CONCLUSIONS
The children were not exposed to dental fluorosis in the daycare centres. However, the risk cannot be ignored, considering the meals and the use of fluoridated dentifrices at home may also contribute to fluoride intake.
UNESP-São Paulo State University, Araçatuba School of Dentistry, Araçatuba, SP, Brazil. anapagliari@yahoo.com.br
Ana Valéria
AV
Pagliari Tiano
Suzely Adas Saliba
SA
Moimaz
Orlando
O
Saliba
Nemre Adas
NA
Saliba
Dóris Hissako
DH
Sumida
D001628:Beverages / Q000032:analysis; D002327:Cariostatic Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000032:analysis*; D002656:Child Day Care Centers; D002675:Child, Preschool; D004032:Diet / Q000706:statistics & numerical data; D015930:Diet Records; D005459:Fluorides / Q000008:administration & dosage / Q000009:adverse effects / Q000032:analysis*; D009050:Fluorosis, Dental / Q000209:etiology* / Q000517:prevention & control; D005504:Food Analysis; D005522:Food Services; D006801:Humans; D007223:Infant; D014881:Water Supply
D002327:Cariostatic Agents; D005459:Fluorides