title: Fluoridation of the public water supply and prevalence of dental fluorosis in a peripheral district of the municipality of Bauru, SP.
abstract: OBJECTIVE
  The objectives of this study were to assess the fluoride concentration in the public water supply and the prevalence of dental fluorosis in schoolchildren between 7 and 15 years old, living in a peripheral district of the municipality of Bauru.
  
  
  METHODS
  For this, fifty two water samples were collected on three different days of one week. These samples were analyzed for fluoride by means of the ion-sensitive electrode method (Orion 9609) coupled to a potentiometer (Procyon, model 720). In this method, 1.0 mL of TISAB II (Orion) was added to 1.0 mL of the sample. For the epidemiological survey of fluorosis, 52 schoolchildren of both genders, aged between 7 and 15 were assessed, with prior authorization from their caretakers. Only one person examined the children, after supervised toothbrushing and drying with cotton wool rolls. The TF index was used.
  
  
  RESULTS
  The fluoride concentrations in the water samples ranged from 0.62 to 1.20 mg/L, with a mean of 0.9 mg/L. The prevalence of dental fluorosis was 33%, with severity ranging from TF1 to TF4 (Kappa of 0.73 and concordance of 83.33%).
  
  
  CONCLUSIONS
  The results from the analysis of water samples indicated a fluoride concentration greater than recommended for Bauru. The fluorosis levels found were higher than expected for a peripheral district, in which water is one of the few sources of fluoride.
authors.affiliation: Bauru Dental School, University of São Paulo, Bauru, SP, Brazil.
authors.forename: Irene
authors.initials: I
authors.lastname: Ramires
authors.forename: Kelly Polido Kaneshiro
authors.initials: KP
authors.lastname: Olympio
authors.forename: Andréa Gutierrez
authors.initials: AG
authors.lastname: Maria
authors.forename: Juliano Pelim
authors.initials: JP
authors.lastname: Pessan
authors.forename: Vanessa Eid Silva
authors.initials: VE
authors.lastname: Cardoso
authors.forename: Carolina Simonetti
authors.initials: CS
authors.lastname: Lodi
authors.forename: Marília Afonso Rabelo
authors.initials: MA
authors.lastname: Buzalaf