title: Is the presence of Simonart's band in patients with complete unilateral cleft lip and palate associated with the prevalence of missing maxillary lateral incisors?
abstract: BACKGROUND
  The aim of this study was to compare the prevalence of agenesis of the maxillary lateral incisors in the cleft area of patients with unilateral cleft lip and palate with and without Simonart's band.
  
  
  METHODS
  A sample of panoramic radiographs of 121 patients with a mean age of 7 years was divided into 2 groups: group 1 included 60 patients with Simonart's band, and group 2 included 61 patients without Simonart's band. Patients with syndromes were not included. Chi-square tests were used for intergroup comparisons (P <0.05).
  
  
  RESULTS
  In the pooled subgroup, the prevalences of maxillary lateral incisor agenesis, supernumerary maxillary lateral incisors, 1 maxillary lateral incisor mesial to the cleft, and 1 maxillary lateral incisor distal to the cleft were 40.5%, 12.5%, 8.2%, and 38.8%, respectively. In group 1, these frequencies were 35%, 10%, 6.7%, and 48.3%; in group 2, they were 45.9%, 13.1%, 11.5%, and 29.5%. There was a statistically significant difference between the groups for the prevalence of a maxillary lateral incisor distal to the cleft.
  
  
  CONCLUSIONS
  The presence of Simonart's band is associated with a higher frequency of maxillary lateral incisor development in the maxillary process.
authors.affiliation: Postgraduate student, Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil. Electronic address: msyatabe@yahoo.com.br.
authors.forename: Marília Sayako
authors.initials: MS
authors.lastname: Yatabe
authors.forename: Daniela Gamba
authors.initials: DG
authors.lastname: Garib
authors.forename: Guilherme
authors.initials: G
authors.lastname: Janson
authors.forename: Raquel Silva
authors.initials: RS
authors.lastname: Poletto
authors.forename: Terumi Okada
authors.initials: TO
authors.lastname: Ozawa
mesh_terms: D000848:Anodontia / Q000150:complications* / Q000000981:diagnostic imaging; D016022:Case-Control Studies; D002648:Child; D002675:Child, Preschool; D002971:Cleft Lip / Q000000981:diagnostic imaging / Q000473:pathology*; D002972:Cleft Palate / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities*; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging; D009805:Odontogenesis / Q000502:physiology; D016300:Radiography, Bitewing; D011862:Radiography, Panoramic; D012189:Retrospective Studies; D014096:Tooth, Supernumerary / Q000150:complications / Q000000981:diagnostic imaging