Palatal asymmetry assessed by intraoral scans: effects of sex, orthodontic treatment, and twinning. A retrospective cohort study

Symmetry is critical in perceived attractiveness, especially in female faces. The palate determines the teeth' alignment and supports facial soft tissues. Therefore, the study aimed to assess the effects of sex, orthodontic treatment, age, and heritability on the directional, anti-, and fluctua...

Full description

Saved in:
Bibliographic Details
Published in:BMC oral health 2023-05, Vol.23 (1), p.305-305, Article 305
Main Authors: Simon, Botond, Mangano, Francesco Guido, Pál, Adrienn, Simon, István, Pellei, Dalma, Shahbazi, Arvin, Vág, János
Format: Article
Language:English
Subjects:
Age
Asymmetry
Cohort analysis
Dental Care
Female
Females
Fluctuating asymmetry
Gender differences
Health aspects
Heritability
Humans
Intraoral scanner
Male
Molar
Molars
Normal distribution
Orthodontics
Palate
Radiation
Rehabilitation
Retrospective Studies
Services
Sex
Sexes
Siblings
Soft tissues
Symmetry
Symmetry (Biology)
Teeth
Tomography
Tooth
Twins
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Symmetry is critical in perceived attractiveness, especially in female faces. The palate determines the teeth' alignment and supports facial soft tissues. Therefore, the study aimed to assess the effects of sex, orthodontic treatment, age, and heritability on the directional, anti-, and fluctuational asymmetry in the digital palatal model. The palate of 113 twins, 86 female and 27 male subjects, with and without previous orthodontic treatment, were scanned by the Emerald (Planmeca) intraoral scanner. Three lines were constructed horizontally in the digital model, one between the right and left first upper molars and two between the first molars and incisive papilla. Two observers calculated the left and right angles between the mid-sagittal plane and molar-papilla lines. The intraclass correlation coefficient was used to assess the inter-observer absolute agreement. The directional symmetry was determined by comparing the mean left and right angles. The antisymmetry was estimated from the distribution curve of the signed side difference. The fluctuating asymmetry was approximated from the magnitude of the absolute side difference. Finally, the genetic background was assessed by correlating the absolute side difference between monozygotic twin siblings. The right angle (31.1 degrees) was not significantly different from the left one (31.6 degrees). The signed side difference followed a normal distribution with a mean of -0.48 degrees. The absolute side difference (2.29 degrees, p 
ISSN:1472-6831
1472-6831
DOI:10.1186/s12903-023-02993-1