title: Alveolar and dental arch morphology in Angle Class II division 2 malocclusion: a comparative study.
abstract: OBJECTIVE
  The aim of this study was to analyze the dental and alveolar intercanine, interpremolar and intermolar widths in patients with Class II/2 malocclusion and to compare the data with a patient group with normal occlusion and also with a patient group with Class II/1 malocclusion.
  
  
  METHODS
  The study was conducted on 140 untreated patients with permanent dentition, aged 16 to 25 years, which were divided into three groups, according to Angle's classification of occlusion. The measurements of the dento-alveolar intercanine, interpremolar and intermolar widths were made on virtual study models, scanned using an optical 3D scanner. The unpaired (Student's) t-test was used to determine whether there were any significant differences between the Class II/2 and Class I groups and between Class II/2 and Class II/1 groups, respectively (p<0.05).
  
  
  RESULTS
  Significant differences were found between Class II/2 and Class II/1 groups in the maxillary and mandibular intercanine widths. Comparing the Class II/2 and Class I groups, significant differences were found in the mandibular intercanine width, in the maxillary and mandibular interpremolar widths and also in the maxillary and mandibular intercanine and interpremolar alveolar widths.
  
  
  CONCLUSIONS
  The maxillary and mandibular interpremolar widths and the intercanine and interpremolar alveolar widths were larger, while the mandibular intercanine width was shorter in the Class I group than in the Class II division 2 group. The mandibular intercanine width was longer and the maxillary intercanine width was shorter in the Class II division 1 group compared to the Class II division 2 group.
authors.affiliation: Department of Pedodontics and Orthodontics, Department of Dental Prostheses Technology, Faculty of Dental Medicine, "Victor Babes" University of Medicine and Pharmacy, Timisoara, Romania; danacristinabratu@yahoo.com, georgepopa86@yahoo.com.
authors.forename: Raluca Adriana
authors.initials: RA
authors.lastname: Bălan
authors.forename: George
authors.initials: G
authors.lastname: Popa
authors.forename: Romina
authors.initials: R
authors.lastname: Biţă
authors.forename: Mihai
authors.initials: M
authors.lastname: Fabricky
authors.forename: Anca
authors.initials: A
authors.lastname: Jivănescu
authors.forename: Dana Cristina
authors.initials: DC
authors.lastname: Bratu
mesh_terms: D000293:Adolescent; D000328:Adult; D000539:Alveolar Process / Q000473:pathology*; D003724:Dental Arch / Q000473:pathology*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D008312:Malocclusion, Angle Class II / Q000473:pathology*; D015203:Reproducibility of Results; D055815:Young Adult