Abstract

*Dr. Vasu Murthy Sesham, Dr. Praveen Kumar Neela Dr. Pavan Kumar Mamillaplli, Dr. Srikanth Keesara, Dr. Jaya Chandra and 6Dr. Mounika

ABSTRACT

Background: The objective of this study was to evaluate the upper lip length and upper lip thickness changes in Angles class I, class II division 1 and division 2 malocclusions. Methods: A sample of 90 subjects was selected randomly and video equipment was used to capture video (5-10 second). The subjects were divided into three groups according to Angle's classification of malocclusion. Each group was further subdivided by gender (15 males, 15 females). Two frames were selected for each subject. One frame represents the lips at rest and the second frame represents the natural unstrained posed smile. The data for the subjects were analyzed by using one-way analysis of variance (ANOVA) with the Bonferroni post-hoc test. Results: In both males and females, changes in upper lip length and thickness at rest and smile was higher in class I compared with class II division 1 and class II division 2. In males, upper lip length and thickness at rest and at smile was higher in class II division 2 compared to class II division 1. In females, upper lip length and thickness at rest and at smile was higher in class II division 1 compared to class II division 2. Changes in upper lip length and upper lip thickness at rest and on smiling were greater in males as compared with females in all groups. Conclusions: Results from this study indicate that changes in upper lip length and thickness on smiling are affected by malocclusion and these changes differ between males and females.