title: Prevalence of tooth erosion and associated factors in 11-14-year-old Brazilian schoolchildren.
abstract: OBJECTIVE
  Prevalence data about tooth erosion has attracted increasing attention in the dental community; however, population-based studies that assessed the impact of demographic, socioeconomic, and dietetic predictors on tooth erosion are scarce. This investigation assessed the prevalence of this condition of a sample of 11-14-year-old schoolchildren and the etiological factors.
  
  
  METHODS
  A cross-sectional study in a multistage random sample of 944, 11-14-year-old Brazilian schoolchildren was conducted in Santa Maria, Brazil. We recorded the prevalence and severity of tooth erosion, dental caries, and dental enamel hypoplasia. Socioeconomic and habits/dietetic data were collected by a structured questionnaire. Data were analyzed using Poisson regression model taking into account the cluster sample.
  
  
  RESULTS
  Prevalence of tooth erosion was low (7.2%). The most affected teeth were the maxillary incisors. Labial surfaces were more often affected than palatal ones. All the erosive lesions observed were confined to the enamel. Older children [prevalence ratio (PR) = 1.71; 95% confidence interval (CI): 1.06-2.76] with dental enamel hypoplasia (PR = 1.98; 95% CI: 1.21-3.22) were more likely to have tooth erosion. No significant association was observed between tooth erosion, dental caries, habits and dietary patterns, and socioeconomic factors.
  
  
  CONCLUSIONS
  The data suggest that tooth erosion was associated with age and presence of hypoplasia. It may indicate the need of strategies to diagnose in early stages and to minimize consequences.
authors: Medicina Social Department, Universidade Federal de Pelotas, Rio Grande do Sul, Brazil. fabivfer@yahoo.com.br
authors: Fabiana
authors: F
authors: Vargas-Ferreira
authors: Julian Rodrigues
authors: JR
authors: Praetzel
authors: Thiago Machado
authors: TM
authors: Ardenghi
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001628:Beverages / Q000145:classification / Q000706:statistics & numerical data; D001938:Brazil / Q000453:epidemiology; D002648:Child; D003430:Cross-Sectional Studies; D003731:Dental Caries / Q000453:epidemiology; D003743:Dental Enamel / Q000473:pathology; D003744:Dental Enamel Hypoplasia / Q000453:epidemiology; D004522:Educational Status; D005006:Ethnicity / Q000706:statistics & numerical data; D005247:Feeding Behavior / Q000145:classification; D005260:Female; D005764:Gastroesophageal Reflux / Q000453:epidemiology; D006801:Humans; D007180:Incisor / Q000473:pathology; D007182:Income / Q000706:statistics & numerical data; D008297:Male; D009790:Occupations / Q000706:statistics & numerical data; D010290:Parents / Q000193:education; D015995:Prevalence; D012959:Socioeconomic Factors; D019228:Tooth Crown / Q000473:pathology; D014077:Tooth Erosion / Q000453:epidemiology*