Influence of Lip Appearances and Tooth Shade on Smile Attractiveness Perception.

This study determined the effect of lip thickness, lipstick color, and tooth shade on the smile attractiveness perceptions of dentists, laypersons, dental students, and other faculty students. A set of 27 smile photographs was prepared with different lip thicknesses (Tk, thick; , medium; and Tn, thin), lipstick shade (, red; , pink; and , orange), and tooth shades (01, 03, and 1). A total of 212 Thai participants in four rater groups (dentists, laypersons, dental students, and other faculty students) rated smile attractiveness using a visual analog scale (VAS).