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치주인대의 응력 분포 양상에 관한 실험 연구

Other Titles
 AN EXPERIMENTAL STUDY ON THE STRESS DISTRIBUTION IN THE PERIODONTAL LIGAMENT 
Authors
 최광철  ;  김경호  ;  박영철  ;  한정윤 
Citation
 KOREAN JOURNAL OF ORTHODONTICS, Vol.31(1) : 15-24, 2001 
Journal Title
 KOREAN JOURNAL OF ORTHODONTICS 
ISSN
 2234-7518 
Issue Date
2001
Keywords
periodontal ligament ; stress distribution ; center of resistance ; center of rotation
Abstract
In order to achieve a desirable tooth movement, it is of great importance to control the M/F ratio and to know the location of the center of resistance. The purpose of this study was to locate the center of resistance and the axis of rotation, and to estimate the stress distribution in the periodontal ligament with experimental model. After preparing a model of an upper canine with a simulated periodontal ligament and alveolar bone, the force and moment were applied. The tooth movement was traced using measuring device with LVDTs(Linear variable differential transformers) that can measure three dimensional tooth movement in real time. The results were as follows. 1. The location of center of resistance by transverse force was $29\%$ of root length measured from alveolar crest to apex regardless of force magnitude. The position of the center of resistance is more coronal than that of two-dimensional model($42\%$). 2. The center of resistance and the axis of rotation coincide when couple moment was applied. 3. As the magnitude of moment increases, tooth tends to extrude irrespective of the direction of the moment. 4. The relationship between location of force and axis of rotation (a x b = $49.6\;mm^2$) was obtained. A tooth movement can be predicted through this formula. 5. The centers of rotation by transverse force were plotted linearly.
Files in This Item:
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Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyung Ho(김경호) ORCID logo https://orcid.org/0000-0002-8154-2041
Park, Young Chel(박영철)
Choy, Kwang Chul(최광철)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/166948
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