Tooth Width among Qatari with Different Malocclusion

Aims: The aims of this study were to establish the mesiodistal tooth width in a sample of Qatari population. Further, to be able to compare tooth width between genders and Angle classification groups as well as with previous studies. Material and methods: Sixty pairs of pretreatment orthodontic study models with different malocclusion (Class І, Class II, Division 1, Class III malocclusion) were selected from orthodontic records of subjects (30 males and 30 females) seeking orthodontic treatment. Descriptive statistics was done. T-test for comparison between males and females and the ANOVA test was undertaken to explore significant differences between the three groups. Result: Tooth width in upper and lower jaw was presented. Comparison between the right and left side in the upper and lower arch revealed no statistical significant difference. The mesodistal teeth width in males was greater than females in both jaws. Comparison between the three classes of Angle classification show that Class III malocclusion demonstrated statistical significant differences in the lower right and left central incisors, right lateral incisor and left canine (P<0.05). On the other hand, very significant difference was exhibited in the lower right and left first molars (P<0.01) whereas in the upper arch only the upper right canine showed statistical significant difference (P<0.05). Conclusions: The results of the mesiodistal tooth width obtained in the present investigation could be of great help to the clinical Orthodontist for space assessment and to Anthropologists as well as to the Prosthodontist.