Dental fluorosis in the primary dentition and intake of manufactured soy-based foods with fluoride.
OBJECTIVE
To identify manufactured soy-based products more recommended by pediatricians and nutritionists; to determine fluoride concentrations in these products; to evaluate children concerning fluorosis in primary teeth and its association with the consumption of soy-based products.


METHODS
Pediatricians and Nutritionists answered a questionnaire about soy-based products they most recommended to children. Fluoride concentrations of the 10 products more cited were analyzed with the ion-specific electrode. Dental fluorosis exams were performed in 315 4-6-year-old children. Dean's Index was used to assess fluorosis. Among the children examined, 26 had lactose intolerance. Their parents answered a questionnaire about children's and family's profile, besides permitting the identification of soy-based products use. Chi-squared and Multivariable Logistic Regression tests were used (p < 0.05).


RESULTS
Fluoride content in the analyzed products ranged from 0.03 to 0.50 μg F(-)/mL. Dental fluorosis was detected in 11% of the children, with very mild and mild degrees. Dental fluorosis in primary teeth was associated with lactose intolerance (p < 0.05), but there was no significant association with the use of manufactured soy-based products.


CONCLUSIONS
Isolated consumption of soy-based products recommended by health professionals to children do not offer risk of dental fluorosis in primary teeth, which had a low prevalence and severity.
Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil. capazcar@usp.br
Cristiane Alves Paz
CA
de Carvalho
César Augusto
CA
Zanlorenzi Nicodemo
Daniela Cristiane
DC
Ferreira Mercadante
Fábio Silva
FS
de Carvalho
Marília Afonso Rabelo
MA
Buzalaf
Sílvia Helena
SH
de Carvalho Sales-Peres
D001938:Brazil / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D005260:Female; D005459:Fluorides / Q000008:administration & dosage* / Q000009:adverse effects* / Q000032:analysis; D009050:Fluorosis, Dental / Q000453:epidemiology*; D006306:Health Surveys; D006801:Humans; D016015:Logistic Models; D008297:Male; D015999:Multivariate Analysis; D015995:Prevalence; D012307:Risk Factors; D045730:Soy Foods / Q000032:analysis*; D011795:Surveys and Questionnaires; D014094:Tooth, Deciduous / Q000187:drug effects* / Q000378:metabolism
D005459:Fluorides