title: Two-dimensional lateral cephalometric evaluation of varying types of Class II subgroups on posterior airway space in postadolescent girls: a pilot study.
abstract: OBJECTIVE
  The purpose of this study was to compare pharyngeal airway linear measurements of untreated skeletal Class II subjects with low-, neutral- and high-angle facial patterns and a skeletal Class I control group of postadolescent girls.
  
  
  METHODS
  We enrolled 50 postadolescent girls in this study. The Class II,1 cohort included subjects presenting ANB angles greater than 4°. Subjects were categorized as belonging to one of three different rotation models: high, neutral and low angles. ANOVA and Duncan's tests were used to identify differences within and among groups (p<0.05).
  
  
  RESULTS
  Pharyngeal airway measurements were significantly smaller (p<0.05) in the high-angle Class II group. In addition, the narrowest linear measurements of the oropharynx (ph-pph) were also smaller in the high-angle Class II group (p=0.055). Soft palate thickness (sp1-sp2) was significantly greater (p<0.05) in the low-angle Class II group.
  
  
  CONCLUSIONS
  That smaller airway measurements in only the high-angle Class II subjects were noted confirms an association between pharyngeal airway measurements and a vertical skeletal pattern. However, we could not ascertain that a sagittal jaw relationship had an effect on airway space.
authors.affiliation: Department of Orthodontics, School of Dentistry, Near East University, Lefkosa, Northern Cyprus, Turkey. ulasoz@gmail.com
authors.forename: Ulas
authors.initials: U
authors.lastname: Oz
authors.forename: Kaan
authors.initials: K
authors.lastname: Orhan
authors.forename: Meliha
authors.initials: M
authors.lastname: Rubenduz
mesh_terms: D000293:Adolescent; D059925:Anatomic Landmarks / Q000000981:diagnostic imaging; D002508:Cephalometry / Q000379:methods*; D005260:Female; D006801:Humans; D008311:Malocclusion, Angle Class I / Q000000981:diagnostic imaging*; D008312:Malocclusion, Angle Class II / Q000000981:diagnostic imaging*; D009960:Oropharynx / Q000000981:diagnostic imaging*; D010160:Palate, Soft / Q000000981:diagnostic imaging*; D010614:Pharynx / Q000000981:diagnostic imaging*; D011861:Radiography, Dental / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity