Background and Objectives: Root anatomy of lower third molar (LTM) may have variable patterns. Root number, shape and curvature all affecting the process of surgery. To determine frequency of different root patterns of LTM. Patients and methods: Retrospectively, a total of 196 orthopantomograms of department of radiology were evaluated for LTM root number and curvature of roots. Results: two roots 173 (88.26%) one root 22 (11.74%). All single rooted teeth showed no curvature. Among two rooted teeth the study figured out that majority of roots not fused but converge 134 (77.45%), fused together 20 (11.5%), not fused but diverge 11 (≈ 6%), not fused with root curvature. Conclusion: Majority of LTM have two or more roots, they are convergent or divergent. Root anatomy evaluation before surgery is mandatory.
Background and objectives: the problem of impacted teeth remain actual in all countries. Differences in ethnicity, culture and environment may play a role in its occurrence. The objective is to find the differences in prevalence of this problem between population of Erbil/Iraq and Iraqi neighboring countries. Patients and methods: primary data of Erbil population and secondary data of Iraqi neighboring countries were used. A retrospective analysis done for all orthopantomograms in college of dentistry, then compared to published data of those countries. Results: regarding the age and sex, there is no such significant differences between all included countries; considering dominant type of impaction, Kuwait was different from others by dominance of vertical impaction; Distoangular impaction in Erbil was twice of other countries. Conclusion: there is no significant differences between Erbil population and Iraqi neighboring countries regarding the prevalence and angulation of impaction.
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