Comparison of mandibular arch forms of Korean and Vietnamese patients by using facial axis points on three-dimensional models
Lee Kil-Jun, Trang Vu Thi Thu, Bayome Mohamed, 박재현, 김용, 국윤아,
소속 상세정보
( Lee Kil-Jun ) - Catholic University Graduate School of Clinical Dental Science
( Trang Vu Thi Thu ) - Catholic University Graduate School
( Bayome Mohamed ) - Catholic University
박재현 ( Park Jae-Hyun ) - A.T. Still University Arizona School of Dentistry & Oral Health Postgraduate Orthodontic Program
김용 ( Kim Yong ) - Private practice
국윤아 ( Kook Yoon-Ah ) - Catholic University Seoul St. Mary’s Hospital Department of Orthodontics
KMID : 0361920130430060288
Abstract
Objective: This study was aimed at comparing the mandibular arch forms of Korean and Vietnamese patients by using facial axis (FA) points on three-dimensional (3D) models.
Methods: Mandibular casts of 68 Korean (Class I malocclusion, 30; Class II malocclusion, 38) and 78 Vietnamese (Class I malocclusion, 41; Class II malocclusion, 37) patients were scanned in their occluded positions and grouped according to arch form (tapered, ovoid, and square). The FA point of each tooth was digitized on the 3D mandibular models. The measurements and frequency distributions of the arch forms were compared between the ethnic groups.
Results: The Vietnamese patients had significantly greater intercanine depth and intercanine and intermolar width-to-depth ratios than the Korean patients (p < 0.05). The frequency distributions of the arch forms were also significantly different (p = 0.038), but no sexual dimorphism was found.
Conclusions: Vietnamese people tend to have deeper and wider arches than Korean people. The three arch forms are evenly distributed in Korean people, but Vietnamese people frequently have square arches. Clinicians should identify the correct arch form of an ethnic group before initiating orthodontic treatment.
키워드
Arch form; Digital models; Ethnic norms; Vietnamese; Korean
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