Smile Reproducibility and Its Relationship to Self-Perceived Smile Attractiveness.

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)

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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