title: Retrospective study on the occurrence of primary incisor trauma in preschool children of a low-income area in Brazil.
abstract: OBJECTIVE
  The objective of this study was to investigate the occurrence of trauma in primary incisors in a sample of preschool Brazilian children living in a low-income area of Rio de Janeiro, Brazil.
  
  
  METHODS
  For the study 527 dental records of a Municipal Children's Hospital were evaluated, and the following related factors were recorded: gender age, tooth affected, type and cause of trauma. Data were tabulated and subjected to statistical analysis (chi-square test).
  
  
  RESULTS
  There were no significant differences in the prevalence of injuries among boys and girls. Children 10 to 24 months-old were the most affected (p < 0.05). The maxillary central incisor was the most affected tooth (p < 0.05), with predominance of lateral luxation and concussions (p > 0.05). The most common cause of trauma was associated with child's own-height fall (p < 0.05).
  
  
  CONCLUSIONS
  Based on the results, it was concluded that the high incidence of incisor trauma in deciduous teeth should be viewed with concern, requiring the implementation of health policies aimed primarily at the prevention of such accidents.
authors.affiliation: Department of Paediatric Dentistry, School of Dentistry Fluminense Federal University, Niterói, Rio de Janeiro, Brazil. chris_coutinho@terra.com.br
authors.forename: T C L
authors.initials: TC
authors.lastname: Coutinho
authors.forename: M R Rodrigues
authors.initials: MR
authors.lastname: Cajazeira
mesh_terms: D000058:Accidental Falls / Q000706:statistics & numerical data; D000367:Age Factors; D000539:Alveolar Process / Q000293:injuries; D001938:Brazil / Q000453:epidemiology; D002675:Child, Preschool; D003743:Dental Enamel / Q000293:injuries; D003789:Dental Pulp Exposure / Q000453:epidemiology; D003804:Dentin / Q000293:injuries; D005260:Female; D006801:Humans; D015994:Incidence; D007180:Incisor / Q000293:injuries*; D007223:Infant; D007572:Jaw Fractures / Q000453:epidemiology; D008297:Male; D008437:Maxilla; D011203:Poverty / Q000706:statistics & numerical data*; D015995:Prevalence; D012189:Retrospective Studies; D012737:Sex Factors; D014084:Tooth Avulsion / Q000453:epidemiology; D019228:Tooth Crown / Q000293:injuries; D014082:Tooth Fractures / Q000453:epidemiology; D014092:Tooth Root / Q000293:injuries; D014094:Tooth, Deciduous / Q000293:injuries*