Dobreva, Denitsa; Gkantidis, Nikolaos; Halazonetis, Demetrios; Verna, Carlalberta; Kanavakis, Georgios (2022). Smile Reproducibility and Its Relationship to Self-Perceived Smile Attractiveness. Biology, 11(5) MDPI 10.3390/biology11050719
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The reproducibility of facial expressions has been previously explored, however, there is no detailed information regarding the reproducibility of lip morphology forming a social smile. In this study, we recruited 93 young adults, aged 21-35 years old, who agreed to participate in two consecutive study visits four weeks apart. On each visit, they were asked to perform a social smile, which was captured on a 3D facial image acquired using the 3dMD camera system. Assessments of self-perceived smile attractiveness were also performed using a VAS scale. Lip morphology, including smile shape, was described using 62 landmarks and semi-landmarks. A Procrustes superimposition of each set of smiling configurations (first and second visit) was performed and the Euclidean distance between each landmark set was calculated. A linear regression model was used to test the association between smile consistency and self-perceived smile attractiveness. The results show that the average landmark distance between sessions did not exceed 1.5 mm, indicating high repeatability, and that females presented approximately 15% higher smile consistecy than males (p < 0.05). There was no statistically significant association between smile consistency and self-perceived smile attractiveness (η2 = 0.015; p = 0.252), when controlling for the effect of sex and age.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > School of Dental Medicine > Department of Orthodontics |
UniBE Contributor: |
Gkantidis, Nikolaos |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
2079-7737 |
Publisher: |
MDPI |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
30 May 2022 10:41 |
Last Modified: |
05 Dec 2022 16:20 |
Publisher DOI: |
10.3390/biology11050719 |
PubMed ID: |
35625447 |
Uncontrolled Keywords: |
3D imaging 3dMD facial expressions lip morphology smile attractiveness smile reproducibility stereophotogrammetry |
BORIS DOI: |
10.48350/170332 |
URI: |
https://boris.unibe.ch/id/eprint/170332 |
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