Operative Dentistry, National and Kapodistrian University of Athens, Athens, Greece.
School of Dentistry, National and Kapodistrian University of Athens, Athens, Greece.
J Esthet Restor Dent. 2021 Sep;33(6):856-864. doi: 10.1111/jerd.12678. Epub 2020 Dec 2.
To evaluate the influence of lightness difference of a single anterior maxillary tooth on difference smile attractiveness.
A frontal view full-portrait image of a smiling male Caucasian, was digitally modified altering a single tooth, creating a series of images with varying lightness (ΔL) for the maxillary central, lateral and canine. A total of 160 participants (80 dentists, 80 laypersons) were asked to fill out a Visual Analog Scale questionnaire for every image recording smile attractiveness.
For central incisors ΔL≥1 negatively affected attractiveness. There was a higher tolerance for lightness mismatch when one lateral incisor is lighter and the same applies when the canine was darker. Difference in lightness affected smile attractiveness both for dentists and laypersons. No difference between males and females was observed for the dentists. For laypersons, females perceived smiles with lightness difference as significantly less attractive compared to males. Dentist's age did not affect smile attractiveness perception. Younger laypersons perceived darker color, as less attractive.
Changes in lightness of a single anterior tooth significantly affected smile attractiveness in a different way for the central vs lateral vs canine. For the dentists, age and gender did not significantly affect smile perception, in contrast to laypeople.
Lightness differences of a single anterior tooth affects smile attractiveness.
评估上颌单颗前牙明度差异对微笑吸引力的影响。
对一名男性白种人微笑的正面全肖像图像进行数字修改，改变单个牙齿，为上颌中切牙、侧切牙和尖牙创建一系列具有不同明度（ΔL）的图像。共有 160 名参与者（80 名牙医，80 名非专业人士）被要求填写每幅图像的视觉模拟量表问卷，记录微笑吸引力。
对于中切牙，ΔL≥1 会显著降低吸引力。当一颗侧切牙较浅时，对明度不匹配的容忍度更高，同样当犬牙较暗时也是如此。明度差异会影响牙医和非专业人士对微笑的吸引力。对于牙医，男女之间没有差异。对于非专业人士，女性认为明度差异的微笑明显没有男性有吸引力。牙医的年龄不会影响对微笑吸引力的感知。年轻的非专业人士认为较暗的颜色吸引力较低。
单颗前牙明度的变化对上切牙、侧切牙和尖牙的微笑吸引力有不同的影响方式。对于牙医，年龄和性别对微笑感知没有显著影响，而非专业人士则相反。
单颗前牙的明度差异会影响微笑的吸引力。
