The aim of this study is to evaluate the effect of age and gender on gonial angle and mandibular canal and to see if there is a relationship between them. Additionally, estimation ofthe gonial angle and position of mandibular canal.Materials and method:Computed tomographic images of 72 subjects were analyzed and divided into two groups, group I, age (14-35) years consisting of 18 males and 18 females and group II, age (36-60) years consisting of 18 males and 18 females. The gonial angle and the distance between the most inferior border of the inferior alveolar canal and the lower border of the mandible were measured.Results: There were no statistically significant differences in the gonial angle and the inferior alveolar canal measurements between groups Ι and ΙΙ in both males and females. There was a statistically significant difference between males and females in the gonial angle measurements and the females tended to show greater mean value (126.66) than males (123.94).On the contrary there was no statistically significant difference between them in the inferior alveolar canal measurements.There was a positive significant correlationbetween the gonial angle and the inferior alveolar canal measurements.Conclusion: Gonial angle was affected by gender but not by age. The measurement from inferior alveolar canal to the lower border of mandible not affected by age and gender. There is a positive significant correlationbetween the gonial angle and the inferior alveolar canal measurements.

No abstract