title: Dental anomalies in primary dentition and their corresponding permanent teeth.
abstract: OBJECTIVE
  The objectives of this paper are to estimate the prevalence of dental anomalies in primary dentition in a sample of 2- to 5-year-old Brazilian preschool children, determine their distribution, and investigate their occurrence in the succedaneous teeth of the sample compared with a control group of children with no dental anomalies in the primary dentition.
  
  
  METHODS
  The one-stage sample comprised 1,718 two to five-year-old children with fully erupted primary dentition clinically examined for dental anomalies. All children presenting dental anomalies underwent panoramic radiographs. Descriptive statistics were performed for the studied variables. A control group matched by sex and age was studied to compare the prevalence ratio for dental anomalies in the permanent dentition.
  
  
  RESULTS
  The prevalence of dental anomalies in the primary dentition was 1.8 %, with no significant statistical difference between sexes. Double teeth were the most frequently observed. Dental anomalies on the succedaneous permanent teeth were diagnosed in 54.8 % of the children with affected primary dentition. The prevalence ratio (PR) for dental anomalies in the succedaneous permanent teeth was 17.1 (confidence interval (CI) 5.33-54.12) higher compared with the control group, higher in children with bilateral anomalies (PR = 31.2, CI 10.18-94.36).
  
  
  CONCLUSIONS
  An association between anomalies of the permanent dentition and the presence of dental anomalies in primary teeth was observed, especially when they occur bilaterally.
  
  
  CONCLUSIONS
  The results in the present study have a clinical relevance in the diagnosis of children with dental anomalies in primary dentition. Early identification of these anomalies can aid the dentist in planning dental treatment at the appropriate time.
authors.affiliation: Oral Care Center for Inherited Diseases, University Hospital of Brasília, Brasília, Brazil. e_maildaraquel@yahoo.com.br.|Department of Dentistry, School of Health Science, University of Brasília, Brasília, Brazil. e_maildaraquel@yahoo.com.br.|Faculdade de Ciências da Saúde, Laboratório de Histopatologia Bucal, Campus Universitário Darcy Ribeiro, Avenida L2 Norte, Brasília, CEP: 72400-000, Brazil. e_maildaraquel@yahoo.com.br.
authors.forename: R R
authors.initials: RR
authors.lastname: Gomes
authors.affiliation: Oral Care Center for Inherited Diseases, University Hospital of Brasília, Brasília, Brazil.|Department of Dentistry, School of Health Science, University of Brasília, Brasília, Brazil.
authors.forename: J A C
authors.initials: JAC
authors.lastname: Fonseca
authors.affiliation: Oral Care Center for Inherited Diseases, University Hospital of Brasília, Brasília, Brazil.|Department of Dentistry, School of Health Science, University of Brasília, Brasília, Brazil.
authors.forename: L M
authors.initials: LM
authors.lastname: Paula
authors.affiliation: Oral Care Center for Inherited Diseases, University Hospital of Brasília, Brasília, Brazil.|Department of Dentistry, School of Health Science, University of Brasília, Brasília, Brazil.
authors.forename: A C
authors.initials: AC
authors.lastname: Acevedo
authors.affiliation: Oral Care Center for Inherited Diseases, University Hospital of Brasília, Brasília, Brazil.|Department of Dentistry, School of Health Science, University of Brasília, Brasília, Brazil.
authors.forename: H D
authors.initials: HD
authors.lastname: Mestrinho
mesh_terms: D002675:Child, Preschool; D006801:Humans; D014071:Tooth Abnormalities; D014094:Tooth, Deciduous