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The 3-dimensional zone of the center of resistance of the mandibular posterior teeth segment

Authors
 Moon-Bee Oh  ;  Sung-Seo Mo  ;  Chung-Ju Hwang  ;  Chooryung Chung  ;  Ju-Man Kang  ;  Kee-Joon Lee 
Citation
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS, Vol.156(3) : 365-374, 2019 
Journal Title
 AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS 
ISSN
 0889-5406 
Issue Date
2019
MeSH
Alveolar Process/anatomy & histology ; Alveolar Process/diagnostic imaging ; Bicuspid/anatomy & histology ; Bicuspid/diagnostic imaging ; Dental Arch ; Dental Models ; Finite Element Analysis ; Humans ; Imaging, Three-Dimensional/methods* ; Mandible/anatomy & histology* ; Mandible/diagnostic imaging* ; Molar/anatomy & histology ; Molar/diagnostic imaging ; Orthodontics, Corrective ; Periodontal Ligament/anatomy & histology ; Periodontal Ligament/diagnostic imaging ; Tooth/anatomy & histology* ; Tooth/diagnostic imaging* ; Tooth Movement Techniques
Abstract
INTRODUCTION: We sought the 3-dimensional (3D) zone of the center of resistance (ZCR) of mandibular posterior teeth groups (group 1: first molar; group 2: both molars; group 3: both molars and second premolar; group 4: both molars and both premolars) with the use of 3D finite element analysis. METHODS: 3D finite element models comprised the mandibular posterior teeth, periodontal ligament, and alveolar bone. In the symmetric bilateral model, a 100-g midline force was applied on a median sagittal plane at 0.1-mm intervals to determine the anteroposterior and vertical positions of the ZCR (where the applied force induced translation). The most reliable buccolingual position of the ZCR was then determined in the unilateral model. The combination of the anteroposterior, vertical, and buccolingual positions was defined as the ZCR. RESULTS: The ZCRs of groups 1-4 were, respectively, 0.48, 0.46, 0.50, and 0.53 of the mandibular first molar root length from the alveolar crest level and located slightly distobuccally at anteroposterior ratios of 2:3.0, 2:2.3, 2:2.4, and 2:2.5 to each sectional arch length and at buccolingual ratios of 2:1.5, 2:1.1, 2:1.6, and 2:2.4 to the first molar's buccolingual width. CONCLUSIONS: The ZCR can be a useful reference for 3D movement planning of mandibular posterior teeth or segments.
Full Text
https://www.sciencedirect.com/science/article/pii/S088954061930455X
DOI
10.1016/j.ajodo.2018.10.017
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Lee, Kee Joon(이기준) ORCID logo https://orcid.org/0000-0002-0782-3128
Chung, Chooryung J.(정주령) ORCID logo https://orcid.org/0000-0001-9399-7193
Hwang, Chung Ju(황충주) ORCID logo https://orcid.org/0000-0003-3024-4551
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/173084
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