title: Oral disease and social class in a random sample of five-year-old preschool children in a Brazilian city.
abstract: OBJECTIVE
  The objective of the present study was to determine the association between oral disease, access to dental care and social class in a random sample of five-year-old preschool children in Belo Horizonte, Minas Gerais, Brazil.
  
  
  METHODS
  A cross-sectional study was carried out on a sample of 551 five-year-old children who were randomly selected from preschools. Oral health status was assessed using the decayed, missing or filled teeth (dmft) index as well as the presence of visible plaque, gingivitis and supragingival calculus. Oral examinations were performed by two examiners (j > 0.80). The clinical outcome variables were dental caries, filled and missing teeth, dental pulp exposure due to caries, dental root fragment, visible plaque, gingivitis and supragingival calculus. Social class was assessed using the City Hall database.
  
  
  RESULTS
  Children without caries represented 63.9% of the sample. Mean overall dmft was calculated to be 1.56, and the decayed teeth component was the highest in all of the social classes. Missing teeth, caries with pulp involvement and dental root fragment had higher proportions and the filled teeth component had the lowest proportion in children from the lowest social class. Visible dental plaque was present in 45.4% of the children. Except for the filled teeth component, all of the clinical outcome variables had a significant association with social class status (P < 0.001), regardless of child's gender.
  
  
  CONCLUSIONS
  Oral disease in the primary dentition and access to dental treatment are affected by social and cultural factors.
authors.affiliation: Department of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, Federal University of Minas Gerais, Belo Horizonte, Brazil. karinabonanato@ig.com.br
authors.forename: Karina
authors.initials: K
authors.lastname: Bonanato
authors.forename: Isabela A
authors.initials: IA
authors.lastname: Pordeus
authors.forename: Fabíola R
authors.initials: FR
authors.lastname: Moura-Leite
authors.forename: Maria L
authors.initials: ML
authors.lastname: Ramos-Jorge
authors.forename: Miriam P
authors.initials: MP
authors.lastname: Vale
authors.forename: Saul M
authors.initials: SM
authors.lastname: Paiva
mesh_terms: D001938:Brazil / Q000453:epidemiology; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D004245:DMF Index; D003731:Dental Caries / Q000453:epidemiology*; D003741:Dental Deposits / Q000453:epidemiology; D005260:Female; D005891:Gingivitis / Q000453:epidemiology; D006297:Health Services Accessibility; D006801:Humans; D016015:Logistic Models; D008297:Male; D020380:Needs Assessment; D015995:Prevalence; D012494:Sampling Studies; D012923:Social Class; D018709:Statistics, Nonparametric; D014094:Tooth, Deciduous; D014505:Urban Population