title: Prevalence of mesiodens in orthodontic patients with deciduous and mixed dentition and its association with other dental anomalies.
abstract: OBJECTIVE
  To determine the prevalence of mesiodens in deciduous and mixed dentitions and its association with other dental anomalies.
  
  
  METHODS
  Panoramic radiographs of 1,995 orthodontic patients were analyzed retrospectively, obtaining a final sample of 30 patients with mesiodens. The following aspects were analyzed: gender; number of mesiodens; proportion between erupted and non-erupted mesiodens; initial position of the supernumerary tooth; related complications; treatment plan accomplished; and associated dental anomalies. The frequency of dental anomalies in the sample was compared to reference values for the general population using the chi-square test, with a significance level set at 5%.
  
  
  RESULTS
  The prevalence of mesiodens was 1.5% more common among males (1.5:1). Most of the mesiodens were non-erupted (75%) and in a vertical position, facing the oral cavity. Extraction of the mesiodens was the most common treatment. The main complications associated with mesiodens were: delayed eruption of permanent incisors (34.28%) and midline diastema (28.57%). From all the dental anomalies analyzed, only the prevalence of maxillary lateral incisor agenesis was higher in comparison to the general population.
  
  
  CONCLUSIONS
  There was a low prevalence of mesiodens (1.5%) in deciduous and mixed dentition and the condition was not associated with other dental anomalies, except for the maxillary lateral incisor agenesis.
authors.forename: Tulio Silva
authors.initials: TS
authors.lastname: Lara
authors.forename: Melissa
authors.initials: M
authors.lastname: Lancia
authors.forename: Omar Gabriel
authors.initials: OG
authors.lastname: da Silva Filho
authors.forename: Daniela Gamba
authors.initials: DG
authors.lastname: Garib
authors.forename: Terumi Okada
authors.initials: TO
authors.lastname: Ozawa
mesh_terms: D000293:Adolescent; D000848:Anodontia / Q000453:epidemiology; D001938:Brazil / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D003818:Dentition, Mixed; D003970:Diastema / Q000453:epidemiology; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities / Q000473:pathology; D008297:Male; D015995:Prevalence; D011862:Radiography, Panoramic / Q000706:statistics & numerical data; D012189:Retrospective Studies; D012737:Sex Factors; D014071:Tooth Abnormalities / Q000453:epidemiology*; D014078:Tooth Eruption; D014081:Tooth Extraction / Q000706:statistics & numerical data; D014094:Tooth, Deciduous / Q000002:abnormalities*; D014096:Tooth, Supernumerary / Q000453:epidemiology*; D014097:Tooth, Unerupted / Q000453:epidemiology
keywords: Child; Prevalence; Supernumerary tooth