Application of spherical coordinate system to facial asymmetry analysis in mandibular prognathism patients
윤숙자, Wang Rui-Feng, 황현식, 강병철, 이재서, Palomo Juan Martin,
소속 상세정보
윤숙자 ( Yoon Suk-Ja ) - Chonnam National University School of Dentistry Dental Science Research Institute Department of Oral and Maxillofacial Radiology
( Wang Rui-Feng ) - University of Michigan School of Dentistry Department of Biologic and Material Sciences
황현식 ( Hwang Hyeon-Shik ) - Chonnam National University School of Dentistry Dental Science Research Institute Department of Orthodontics
강병철 ( Kang Byung-Cheol ) - Chonnam National University School of Dentistry Dental Science Research Institute Department of Orthodontics
이재서 ( Lee Jae-Seo ) - Chonnam National University School of Dentistry Department of Oral and Maxillofacial Radiology
( Palomo Juan Martin ) - Case Western Reserve University School of Dental Medicine Department of Orthodontics
KMID : 1024020110410030095
Abstract
Purpose: The purpose of this study was to compare asymmetric mandibular prognathism individuals with symmetric mandibular prognathism individuals using a new alternate spherical coordinate system.
Materials and Methods: This study consisted of 47 computed tomographic images of patients with mandibular prognathism. The patients were classified into symmetric and asymmetric groups. Mandibular and ramal lines were analyzed using an alternate spherical coordinate system. The length as well as midsagittal and coronal inclination angle of the lines was obtained. The bilateral differences of the spherical coordinates of the facial lines were statistically analyzed in the groups.
Results: There were significant differences between the groups in bilateral difference of the length and midsagittal inclination angle of the lines (p<0.05). The bilateral difference of the length and midsagittal inclination angle of the lines has significant correlation with chin deviation (p<0.05).
Conclusion: The new alternate spherical coordinate system was able to effectively evaluate facial lines. The bilateral difference of lengths and midsagittal inclination of the facial lines might contribute to the facial asymmetry in mandibular prognathism individuals.
키워드
Prognathism; Face; Tomography; X-ray Computed; Quantitative Evaluation
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