title: [Fluoride urinary excretion in Mexico City's preschool children].
abstract: OBJECTIVE
  The assessment of urinary fluoride excretion during dental developing stage has been reported for different countries with community fluoride programs. Also, one of the factors that could influence on retention and excretion of fluoride is the deficient nutrition so the aim of this study was to determine fluoride urinary excretion by a group of preschool children with and without malnutrition.
  
  
  METHODS
  Urinary samples from 24 hours were collected from 60 preschool children selected by convenience from Iztapalapa area of Mexico City, 30 with malnutrition and 30 with standard nutritrional status by weight for age. The samples were analyzed by fluoride especific electrode. Orion 720A.
  
  
  RESULTS
  The average concentration of fluoride in urine from preschool children with and without malnutrition were 0.89 +/- 0.4 mg/L and 0.80 +/- 0.3 mg/L, respectively. The mean of 24 hours total fluoride excreted were 367 +/- 150 microg/24 hrs. in malnutrition children and 355 +/- 169 microg/24 hrs. for those with standard nutritional status. There were no differences statistically significant between groups.
  
  
  CONCLUSIONS
  The urinary fluoride excretion for children with and without malnutrition were in the optimal range of fluoridation for the prevention of caries decay. Malnutrition was no associated with changes on fluoride orine concentration and excretion rates.
authors.affiliation: Estomatología Pediátrica, Facultad de Estudios Superiores Zaragoza, UNAM. liadju@yahoo.com
authors.forename: María Lilia Adriana
authors.initials: ML
authors.lastname: Juárez-López
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Hernández-Guerrero
authors.forename: Dolores
authors.initials: D
authors.lastname: Jiménez-Farfán
authors.forename: Nelly
authors.initials: N
authors.lastname: Molina-Frechero
authors.forename: Francisco
authors.initials: F
authors.lastname: Murrieta-Pruneda
authors.forename: Georgina
authors.initials: G
authors.lastname: López-Jiménez
mesh_terms: D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D005459:Fluorides / Q000652:urine*; D006801:Humans; D008297:Male; D044342:Malnutrition / Q000652:urine*; D008800:Mexico; D014505:Urban Population
chemical_list: D005459:Fluorides