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http://dx.doi.org/10.4041/kjod.2014.44.2.62

Three-dimensional symmetry and parallelism of the skeletal and soft-tissue poria in patients with facial asymmetry  

Kim, Min-Gun (Department of Orthodontics, School of Dentistry, Dankook University)
Lee, Jin-Woo (Department of Orthodontics, School of Dentistry, Dankook University)
Cha, Kyung-Suk (Department of Orthodontics, School of Dentistry, Dankook University)
Chung, Dong-Hwa (Department of Orthodontics, School of Dentistry, Dankook University)
Lee, Sang-Min (Department of Orthodontics, School of Dentistry, Dankook University)
Publication Information
The korean journal of orthodontics / v.44, no.2, 2014 , pp. 62-68 More about this Journal
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 ($p{\leq}0.05$; 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.
Keywords
Computed tomography; Soft tissue; Anatomy; Facial asymmetry; Porion; Parallelism;
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Times Cited By KSCI : 3  (Citation Analysis)
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