Dentoalveolar characteristics in Class II, division 1 malocclusion.

I. S. Papageorgiou, M. A. Papadopoulos
Hellenic Orthodontic Review 2002;5:69-82.

AIM: Investigation and evaluation of dentoalveolar characteristics in patients with Class II, division 1 malocclusion and comparison with subjects with Class 1 occlusion.
STUDY DESIGN: Cross-sectional study.
TIME AND PLACE OF STUDY: Department of Orthodontics, Aristotle University of Thessaloniki, 1999.
MATERIAL AND METHOD: Dental casts of 35 patients with Class II, division 1 malocclusion (15 boys and 20 girls, mean age: 13±1.35 years) and 30 subjects with Class 1 occlusion (17 boys and 13 girls, mean age: 13.5±0.81 years) were used.
PRINCIPAL MEASUREMENTS: 17 variables were investigated and the results were analyzed using the statistical software Statistica. The «Student t-test» was used to evaluate possible differences between patient and control groups. Double measurements were performed on 40 randomly selected study costs in order to assess the method’s error.
RESULTS: Patients with Class II, division 1 malocclusion, when compared with Class 1 occlusion, presented (a) in the upper dental arch and maxilla, smaller intermolar, interpemolar and intercanine widths, shorter palatal height and shorter apical base length, and greater dental arch depth, and (b) in the lower dental arch, smaller intermolar and interpemolar widths.
CONCLUSIONS: According to the results of this study, patients with Class II, division 1 malocclusion presented narrower dental arches, shorter palatal height and deeper upper dental arch, whereas their upper apical base is shorter compared to subjects with Class 1 occlusion.