IADR Abstract Archives

The Association Between the Dental and Facial Symmetry in Adolescents

Objectives: The objective was to investigate the correlation between dental midline shift and facial asymmetry parameters.
Methods: The sample was retrieved from an ongoing growth study at the Riga Stradins University.
Seventeen individuals were excluded from the initial sample of 107 individuals for different reasons. The total sample was 90 individuals (47 males and 43 females) with the median age of 15,9 (IQR 15,17 – 16,33).
The facial scans were obtained using 3dMD facial scanner. The occlusion was scanned with 3Shape scanner. Facial symmetry was assessed with the surface-based and landmark-based analysis. The differences in the co-lateral position of the molars and canines and the dental midline shift were assessed on the dental scans.
Correlations between the occlusal symmetry measurements and the facial symmetry parameters were assessed with the Spearman’s correlation.
The study was approved by The Ethics Committee (number 6-2/5/1).
Results: There were weak correlations between the dental midline shift and the maximum distance between the mirrored and original face for the mid-face (r = 0.219, p<0.05), lower midface (r = 0.311, p<0.01) and lower face (r = 0.289, p<0.01). Several landmark-based symmetry parameters were weakly correlated with the dental midline shift. The dental arch asymmetry, which was expressed at the canine region, had statistically significant correlations with the midpoint shift for all landmarks, except the upper lip. The shift of the dental midline was weakly associated with the increase of the respective side ex-canthion pogonion angles.
The mean Chin Volume Asymmetry index (CVAI) showed that the right side was bigger significantly more often (p = 0.0007) in the individuals with the dental midline shift to the right side and vice versa.
Conclusions: The occlusal asymmetry is represented in the face to some extent.
The dental midline shift was associated with the dislocation of the midpoints of the facial landmarks and reduced surface symmetry of the chin.

2021 Continental European and Scandinavian Divisions Meeting (Brussels, Belgium, Hybrid)
Brussels, Belgium, Hybrid
2021
0135
Orthodontics Research
  • Lokmane, Kristine  ( Riga Stradins University , Riga , Latvia )
  • Silinevica, Signe  ( Riga Stradins University , Riga , Latvia )
  • Vuollo, Ville  ( University of Oulu , Oulu , Finland )
  • Jakobsone, Gundega  ( Riga Stradins University , Riga , Latvia )
  • NONE
    Oral Session VIRTUAL
    Orthodontics