Three-dimensional symmetry and parallelism of the skeletal and soft-tissue poria in patients with facial asymmetry.
10.4041/kjod.2014.44.2.62
- Author:
Min Gun KIM
1
;
Jin Woo LEE
;
Kyung Suk CHA
;
Dong Hwa CHUNG
;
Sang Min LEE
Author Information
1. Department of Orthodontics, School of Dentistry, Dankook University, Cheonan, Korea. saegum@naver.com
- Publication Type:Original Article
- Keywords:
Computed tomography;
Soft tissue;
Anatomy;
Facial asymmetry;
Porion;
Parallelism
- MeSH:
Facial Asymmetry*;
Humans;
Poria*
- From:The Korean Journal of Orthodontics
2014;44(2):62-68
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: The purpose of this study was to examine the symmetry and parallelism of the skeletal and soft-tissue poria by three-dimensional (3D) computed tomographic (CT) imaging. METHODS: The locations of the bilateral skeletal and soft-tissue poria in 29 patients with facial asymmetry (asymmetric group) and 29 patients without facial asymmetry (symmetric group) were measured in 3D reconstructed models of CT images by using a 3D coordinate system. The mean intergroup differences in the anteroposterior and vertical angular deviations of the poria and their anteroposterior and vertical parallelism were statistically analyzed. RESULTS: The symmetric and asymmetric groups showed significant anteroposterior angular differences in both the skeletal and the soft-tissue poria (p = 0.007 and 0.037, respectively; Mann-Whitney U-test). No significant differences in the anteroposterior and vertical parallelism of the poria were noted (p < or = 0.05; Wilcoxon signed-rank test). CONCLUSIONS: In general, the skeletal poria are parallel to the soft-tissue poria. However, patients with facial asymmetry tend to have asymmetric poria.
