فراواني شاخص هاي لبخند در بين دانشجويان دندان پزشكي دانشگاه اصفهان

Frequency of smile indices among students of Isfahan dental school

Introduction: Esthetic in dentistry requires the consideration of some indices. The frequency of these indices varies in different populations. This study was designed to determine the frequency of smile indices in students of Isfahan dental school.Method and materials: In this descriptive study 110 dental students were selected. A film was recorded from full smile of subjects. Computer photographs were prepared and the esthetic indices were measured on these photographs. Independent sample t-test was applied to determine whether a significant difference exist between the various means. The significance level was set at a = 0.05. Results: Lip line was in middle position in 75.5% of cases, second premolars displayed in the corner of the mouth in 41.8%, position of the upper lip corners to the lower center of the upper lip was upward in 52.7%), maxillary incisal curve was parallel to the lower lip in 59.1%>, incisal edge of the anterior teeth did not touch the lower lip in 58.2%, smile was symmetric in 81.8%, mandibular teeth were not displayed in 60.9%, negative space was present in 67.3%o and midline was on, in 83.6% of Conclusion: In regard to variety in smile characteristic of different races, it is recommended to repeat this study in different Iranian population to determine more precisely the smile indices in Iranian with different age and personalities.