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Urinary fluoride excretion by children 4-6 years old in a south Texas community

dc.contributor.authorBaez, Ramon Jes_ES
dc.contributor.authorBaez, Martha Xes_ES
dc.contributor.authorMarthaler, Thomas Mes_ES
dc.date.accessioned2015
dc.date.available2015
dc.date.issued2000es_ES
dc.identifier.citationBaez, Ramon J,Baez, Martha X,Marthaler, Thomas M (2000) Urinary fluoride excretion by children 4-6 years old in a south Texas community. Rev Panam Salud Publica;7(4) -,abr. 2000. Retrieved from http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892000000400005&lng=pt&nrm=isoes_ES
dc.identifier.urihttp://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892000000400005&lng=pt&nrm=isoes_ES
dc.identifier.urihttps://iris.paho.org/handle/10665.2/8831
dc.format.extenttabes_ES
dc.relation.ispartofseriesRev Panam Salud Publica;7(4),abr. 2000es_ES
dc.subjectUrinaes_ES
dc.subjectFluoretoses_ES
dc.subjectÁgua Potávelpt_BR
dc.subjectEstados Unidoses_ES
dc.titleUrinary fluoride excretion by children 4-6 years old in a south Texas communityes_ES
dc.typeJournal articlesen_US
dc.rights.holderPan American Health Organizationen_US
dc.description.notesThis study evaluated urinary fluoride excretion by school children 4-6 years old who were living in a south Texas rural community that had concentrations of fluoride in drinking water supplies generally around the optimal level. We took supervised collections of urine samples in the morning and afternoon at school, and parents of the participating students collected nocturnal samples. We recorded the beginning and end times of the three collection periods and then determined the urinary volume and urinary flow for each of the periods. We measured urinary fluoride concentrations and calculated the urinary excretion rate per hour. The children had breakfast and lunch provided at the school, where the drinking water contained 1.0-1.3 milligrams/liter (mg/L) fluoride. Fluoride concentrations in the tested household water supplies, from wells, ranged from 0.1 to 3.2 mg/L fluoride. The children's average urinary fluoride concentrations found for the day were similar to those for the night, with means ranging from 1.26 mg/L to 1.42 mg/L. Average excretion was 36.4 mg/h in the morning, 45.6 mg/h in the afternoon, and 17.5 mg/h at night. The lower nocturnal excretion rates are easily explained by low urinary flow at night. Based on the 15 hours of urine collected, the extrapolated 24-hour fluoride excretion was 749 µg. In conjunction with similar studies, the data from this study will help in developing upper limits for urinary fluoride excretion that are appropriate for avoiding unsightly fluorosis while providing optimal protection against dental decayen_US


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