title: Prevalence and severity of vestibular recession in mandibular incisors after orthodontic treatment.
abstract: OBJECTIVE
  To assess the prevalence and severity of vestibular gingival recession of mandibular incisors after orthodontic treatment and to evaluate possible contributing factors.
  
  
  METHODS
  From the record pool of patients who completed orthodontic treatment from 1999-2006 at the Department of Orthodontics, University of Oslo, Norway, 588 patients fulfilled the inclusion criteria. Intraoral color slides were used for the evaluation of gingival recessions (based on Miller classification), presence of visible plaque, and gingival inflammation. Cephalometric radiographs were used to assess the sagittal intermaxillary relation, mandibular and intermaxillary angles, and the position of the lower incisors. A control group was drawn from the same pool of 588 patients. All statistical analyses were performed using SPSS.
  
  
  RESULTS
  The prevalence of gingival recessions after orthodontic treatment was 10.3%. Most (8.6%) were classified as Miller Class I, and 1.7% were classified as Miller Class II. Gingival recession was predominantly found on central incisors. Reduction of the sagittal intermaxillary angle and retroclination of the lower incisors was correlated with the development of a more severe gingival recession.
  
  
  CONCLUSIONS
  The present study indicates that vestibular gingival recession of mandibular incisors after orthodontic treatment is of minor prevalence and severity. The presence of gingival recession or retroclination of the incisors with mesial basal relations increases the risk of more severe gingival recession.
authors: Department of Orthodontics, Faculty of Dentistry, University of Oslo, Oslo, Norway.
authors: Gisela
authors: G
authors: Vasconcelos
authors: Kristian
authors: K
authors: Kjellsen
authors: Hans
authors: H
authors: Preus
authors: Vaska
authors: V
authors: Vandevska-Radunovic
authors: Bjørn Frode
authors: BF
authors: Hansen
mesh_terms: D000293:Adolescent; D016022:Case-Control Studies; D002508:Cephalometry; D002648:Child; D005260:Female; D005889:Gingival Recession / Q000145:classification / Q000453:epidemiology*; D006801:Humans; D007180:Incisor; D008297:Male; D008310:Malocclusion / Q000628:therapy*; D008334:Mandible; D009664:Norway / Q000453:epidemiology; D009971:Orthodontics, Corrective / Q000009:adverse effects*; D012189:Retrospective Studies; D055815:Young Adult