Abstract
Statement of problem
Information about the effect of the facial flow concept on the smile esthetic perception
of laypeople is lacking.
Purpose
The purpose of this study was to determine the effect of the facial flow concept on
laypeople’s perception of smile esthetics.
Material and methods
Frontal full-face images of a female volunteer were digitally altered to create commissural
line and transverse occlusal plane inclinations, a dental midline shift, and facial
asymmetries. A questionnaire was developed, and a single researcher asked 400 evaluators
to rate the attractiveness of the different smiles by using a visual analog scale.
The subsequent data were analyzed by using 3-factor repeated measures ANOVA and post
hoc Bonferroni tests.
Results
Images with commissural line and transverse occlusal plane inclinations pointing toward
the green side of the facial flow curve were found to be more attractive than those
with inclinations pointing to the red side (P<.001). Asymmetric facial images with the dental midline coinciding with the facial
flow curve had higher esthetic scores than those without (P<.001). Images that showed parallelism between the transverse occlusal plane and commissural
line inclinations were perceived as more esthetic (P<.001).
Conclusions
In an asymmetric face model, the degree and direction of commissural line and transverse
occlusal plane inclinations and dental midline shift influenced the perceived attractiveness
of a smile.
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Article info
Publication history
Published online: July 08, 2021
Identification
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© 2021 by the Editorial Council for the Journal of Prosthetic Dentistry.
