Abstract
To assess the influence of four maxillary anterior teeth-related variables on the smile attractiveness in Saudi population. Two standardized frontal smile photographs with skin color type III (Fitzpatrick scale) a tooth shade BL2 for male and female subjects were used to alter four different variables (lateral incisors length, central incisors angles, length of interproximal contact area and prominence of central incisors). An electronically displayed questionnaire was used to assess the demographic characteristics of subjects along with the satisfaction of their smiles. Each variable had a set of three digitally altered images in which the participant should select the most attractive one. Cross-tabulations and chi-squared tests were used to perform the statistical analyses (alpha = 0.05). 843 subjects were enrolled in the study. The median (IQR) score of importance of smile and level of satisfaction of smile among the study subjects were 9(3) and 7(3) respectively. The comparison of mean rank score of importance of smile, in relation to the age groups, gender and educational level showed statistically significant difference. Mean rank values of level of satisfaction of smile in relation to age groups, gender and educational level were comparable. Most of the Saudi populace preferred 1mm incisal length difference in females and equal incisal length in males, with round incisal angles for both males and females. The ideal interproximal contact area of 50:40:30 proportion was considered as most attractive and almost half of the included Saudi population preferred the prominent central incisor.