Evaluation of DADs among Different Angle's Classification of Malocclusion in a Group of Yemeni Population: A Prospective Study.

Background/aim: This study assesses gender differences in dental arch dimensions (DADs), namely arch width (AW), arch length (AL), and arch perimeter (AP) among different Angle's classifications of malocclusion in a group of Yemeni population.

Subjects and methods: This prospective study was carried out on 120 pairs of dental casts from Yemeni males and females aged 13-30 years. The samples were divided into four groups based on Angle's classification as class I, class II divisions 1 and 2, and class III. The following DAD measurements were assessed using an electronic digital caliper: Arch width, AL, and AP. Statistical significance was set at p < 0.05 for all tests.

Results: Regarding intercanine width, females had shorter AW and AL than males in the class II division 2 group, and no apparent difference in AP was observed. The class III malocclusion group exhibited a larger lower AW than class I and class II division 1 groups. Class II division 1 malocclusion group showed longer upper AL than class I and class II division 2 malocclusion groups. Additionally, lower class III malocclusion had significantly longer AL than both categories of class II malocclusions, and significant difference in upper AP was found among the malocclusion groups, whereas difference in the lower arch was found between the class I and class II division 1 malocclusion groups.

Conclusions: Variations in AW and AL were found between males and females, whereas the AP dimensions were almost the same. Additionally, all the DAD parameters varied among the Angle's classifications of malocclusion.

Clinical significance: Precise DADs measurements and assessments are essential during orthodontic planning and therapy. This indicates whether extraction and/or expansion is necessary, which will prevent relapse and enhancing of treatment stability. How to cite this article: Al-Kurmodi KHSM, Al-Eryani RA, Aldhorae K, et al. Evaluation of DADs among Different Angle's Classification of Malocclusion in a Group of Yemeni Population: A Prospective Study. J Contemp Dent Pract 2025;26(3):285-293.