title: Dehiscence and fenestration in patients with Class I and Class II Division 1 malocclusion assessed with cone-beam computed tomography.
abstract: BACKGROUND
  The aim of this study was to compare the presence of alveolar defects (dehiscence and fenestration) in patients with Class I and Class II Division 1 malocclusions and different facial types.
  
  
  METHODS
  Seventy-nine Class I and 80 Class II patients with no previous orthodontic treatment were evaluated using cone-beam computed tomography. The sample included 4319 teeth. All teeth were analyzed by 2 examiners who evaluated sectional images in axial and cross-sectional views to check for the presence or absence of dehiscence and fenestration on the buccal and lingual surfaces.
  
  
  RESULTS
  Dehiscence was associated with 51.09% of all teeth, and fenestration with 36.51%. The Class I malocclusion patients had a greater prevalence of dehiscence: 35% higher than those with Class II Division 1 malocclusion (P <0.01). There was no statistically significant difference between the facial types.
  
  
  CONCLUSIONS
  Alveolar defects are a common finding before orthodontic treatment, especially in Class I patients, but they are not related to the facial types.
authors.affiliation: Federal University of Goiás, Goiânia, GO, Brazil. karine@odontologiamaxima.com.br
authors.forename: Karine
authors.initials: K
authors.lastname: Evangelista
authors.forename: Karla de Faria
authors.initials: Kde F
authors.lastname: Vasconcelos
authors.forename: Axel
authors.initials: A
authors.lastname: Bumann
authors.forename: Edgar
authors.initials: E
authors.lastname: Hirsch
authors.forename: Margarita
authors.initials: M
authors.lastname: Nitka
authors.forename: Maria Alves Garcia
authors.initials: MA
authors.lastname: Silva
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000209:etiology* / Q000473:pathology; D000539:Alveolar Process / Q000473:pathology*; D016723:Bone Remodeling; D054893:Cone-Beam Computed Tomography; D005145:Face / Q000033:anatomy & histology; D005147:Facial Bones / Q000033:anatomy & histology; D006801:Humans; D008311:Malocclusion, Angle Class I / Q000150:complications* / Q000000981:diagnostic imaging / Q000628:therapy; D008312:Malocclusion, Angle Class II / Q000150:complications* / Q000000981:diagnostic imaging / Q000628:therapy; D008334:Mandible; D008437:Maxilla; D014087:Tooth Movement Techniques / Q000009:adverse effects*; D055815:Young Adult