Abstract:
Background: Changing position and inclination of incisors can affect facial attractiveness and it is one of the most important factors to be considered in orthodontic treatment planning since it can dramatically affect the treatment plan. However, there is no study to estimate the effects of changing incisor position and inclination in smiling profile view in an Asian population Material and method: The photographs in smiling profile view of 2 chosen Thai models (1 male and 1 female) were modified using Photoshop to obtain 8 additional photos with 2 different positions (-3, +3) and 2 different inclinations (-6, +6). Therefore, the total of 9 images of each model were created. The 402 subjects (198 males and 204 females, age 18-34) randomly selected from each sector of Thailand were asked to evaluate attractiveness of each image using visual analog scale. ANOVA was used to compare the mean scores of each image. Result and conclusion: The most attractiveness incisor position in male was normal position, while in female was normal or -3 mm retrusion. Six degree retroclination of incisors from original picture received
highest score in male while normal inclination or +6 degree proclination was rated as the most attractive in female. When considering position together with inclination, it was found that in proclination in male and retroclination in female was the least attractive either in protrusive or retrusive position. Different sectors tended to have different preference in incisor position while other factors did not show obvious difference in the preference.