Finite-element analysis of the center of resistance of the mandibular dentition
조아라, 모성서, 이기준, 성상진, 전윤식,
소속 상세정보
조아라 ( Jo A-Ra ) - Catholic University Graduate School of Clinical Dental Science Department of Orthodontics
모성서 ( Mo Sung-Seo ) - Catholic University College of Medicine Department of Dentistry
이기준 ( Lee Kee-Joon ) - Yonsei University Department of Dentistry
성상진 ( Sung Sang-Jin ) - Asan Medical Center Department of Dentistry Division of Orthodontics
전윤식 ( Chun Youn-Sic ) - Ewha Womans University Mokdong Hospital Department of Orthodontics
KMID : 0361920170470010021
Abstract
Objective: The aim of this study was to investigate the three-dimensional (3D) position of the center of resistance of 4 mandibular anterior teeth, 6 mandibular anterior teeth, and the complete mandibular dentition by using 3D finite-element analysis.
Methods: Finite-element models included the complete mandibular dentition, periodontal ligament, and alveolar bone. The crowns of teeth in each group were fixed with buccal and lingual arch wires and lingual splint wires to minimize individual tooth movement and to evenly disperse the forces onto the teeth. Each group of teeth was subdivided into 0.5-mm intervals horizontally and vertically, and a force of 200 g was applied on each group. The center of resistance was defined as the point where the applied force induced parallel movement.
Results: The center of resistance of the 4 mandibular anterior teeth group was 13.0 mm apical and 6.0 mm posterior, that of the 6 mandibular anterior teeth group was 13.5 mm apical and 8.5 mm posterior, and that of the complete mandibular dentition group was 13.5 mm apical and 25.0 mm posterior to the incisal edge of the mandibular central incisors.
Conclusions: Finite-element analysis was useful in determining the 3D po sition of the center of resistance of the 4 mandibular anterior teeth group, 6 mandibular anterior teeth group, and complete mandibular dentition group.
키워드
Finite-element model; Mandibular dentition; Center of resistance
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