Analysis of Smile Characteristics of Adult Female Subjects with Skeletal Class II Division 2 Malocclusion

Aim: The objective of this study was to evaluate the smile characteristics of adult females with Angle Class II division 2 malocclusion compared to Angle Class I malocclusion. Materials and Methods: Two frontal photographs were taken for 30 orthodontically untreated female adult subjects with age range (18-30) years, at rest and posed smile from a fixed (1.5m) distance between the camera and the subjects. The 30 subjects were divided into 2 groups, 15 for Class II div 2 subjects and 15 for Class I subjects. The camera was focused only on the mouth, showing from the nose to the chin. Included in the capture area frame, an L shaped ruler with millimeter markings mounted on an adjustable tripod on the right side of the patient which was used to standardize the capture area. The photographs were exported to a computer, and uploaded to Adobe Photoshop CS2 where 13 soft tissue land marks were analyzed. Results: comparison between 13 soft tissue land marks for Class II div2 females and Class I females showed significant difference in lower facial height , lower lip thickness, lower lip length , maxillary incisal display, smile height and smile arch. And showed insignificant difference in rest of the measured parameters Conclusions: Angle’s Class II div.2 female subjects have significant lower mean values of the lower facial height, lower lip length, lower lip thickness than Class I female subjects. They also have significant shorter smile height. Incisor display than Class I female subjects. A higher percentage of non-consonant smile arcs were found among Class II division 2 females and it was found to be statistically significant between both groups.