Ghulam Rasool, Ibadullah Kundi.
Comparison of dental arch dimensions among various malocclusion classes.
J Med Sci Jan ;17(2):71-7.

Objective: To compare dental arch length and width among different malocclusion classes. Material and Methods: This study was conducted during Jan 2007-Dec2008 at orthodontic department of Islamic International Dental Hospital, Islamabad. The study sample consisted of 200 dental casts (100 male,100 female), obtained from patients reporting to the department with the age range between 13 to 21 years. The dental arch length and width were measured with the help of digital vernier caliper from dental casts. Comparison of arch dimensions was done among different malocclusion classes. Results: Maxillary and mandibular intermolar and intercanine arch width showed no significant difference among four malocclusion groups. Class II div 1 showed significantly smaller maxillary arch widths than class I. Class II malocclusions showed significantly smaller mandibular intermolar widths than class III group. Maxillary and mandibular arch length showed statistically significant difference among malocclusion groups. Class II div 2 showed significantly smaller maxillary arch length than other three classes. Conclusions: Class II division 1 showed the shortest arch width and Class II divison 2 showed the shortest maxillary arch length. Class III malocclusion showed the largest mandibular arch width and length

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