Dental Arch Dimension of Mixed Dentition of Kurdish Orthodontic Patients with Class I and Class II Division 1 Malocclusion (In-Vitro Comparative Study)

Volume 7 , Issue 1 , June 2020 , Pages 42-48

Authors

Rebin A. Mohammed Amin 1 ; Mahmoud K. Mohsin 1 ; Bayan A. Hassan 1

1 Department of Pedodontic, Orthodontic and Preventive Dentistry, College of Dentistry, Hawler Medical University, Erbil, Iraq.

DOI logo 10.17656/sdj.10105

Keywords

Abstract

Objective: To assess dental arch dimensions (width, depth) in mixed dentition in a sample of Kurdish orthodontic patients.
Methods: A sample of 58 dental casts (28 class I, 30 class II division 1 malocclusions) from 8 years and two months to 10 years and
nine months were collected. Measurement of arch dimensions was taken, including width and depth. Differences between males and
females and between class I and class II division 2 malocclusion were tested using independent t-test.
Results: With gender pooled, class I group has larger UC, UE, U6, LE, L6 width than class II group, whereas class II group has larger
LC width than class I group with no significant difference. The class II group has larger arch depth for maxillary measurements than
the class I group, with no significant difference. While the class I group has larger arch depth for mandibular measurements than the
class II group, with no significant difference except for LC. In gender dimorphism, class I group, all arch width measurements, females
have a larger width than males except L6; all differences were no significant. While in all arch depth measurements, males have larger
depth than females. In the class II group, all measurements of width and depth were larger in males than females, the difference in UE
and U6 were significant.
Conclusions: Class I malocclusion has larger width and depth than class II division 1 malocclusion, except in the maxillary depth of
class II division 1 malocclusion. Males had larger arch dimensions than females.

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