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Three-dimensional finite element analysis of the deformation of the human mandible: a preliminary study from the perspective of orthodontic mini-implant stability

Authors
 Sun-Hye Baek  ;  Hyun-Suk Cha  ;  Jung-Yul Cha  ;  Yoon-Shik Moon  ;  Sang-Jin Sung 
Citation
 KOREAN JOURNAL OF ORTHODONTICS, Vol.42(4) : 159-168, 2012 
Journal Title
 KOREAN JOURNAL OF ORTHODONTICS 
ISSN
 2234-7518 
Issue Date
2012
Keywords
Anatomy ; Finite element method ; Neuromuscular force ; Orthodontic mini-implant ; Stability
Abstract
Objective: The aims of this study were to investigate mandibular deformation under clenching and to estimate its effect on the stability of orthodontic mini-implants (OMI). Methods: Three finite element models were constructed using computed tomography (CT) images of 3 adults with different mandibular plane angles (A, low; B, average; and C, high). An OMI was placed between #45 and #46 in each model. Mandibular deformation under premolar and molar clenching was simulated. Comparisons were made between peri-orthodontic mini-implant compressive strain (POMI-CSTN) under clenching and orthodontic traction forces (150 g and 200 g). Results: Three models with different mandibular plane angles demonstrated different functional deformation characteristics. The compressive strains around the OMI were distributed mesiodistally rather than occlusogingivally. In model A, the maximum POMI-CSTN under clenching was observed at the mesial aspect of #46 (1,401.75 microstrain [µE]), and similar maximum POMI-CSTN was observed under a traction force of 150 g (1,415 µE). Conclusions: The maximum POMI-CSTN developed by clenching failed to exceed the normally allowed compressive cortical bone strains; however, additional orthodontic traction force to the OMI may increase POMI-CSTN to compromise OMI stability.
Files in This Item:
T201205952.pdf Download
DOI
23112947
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Cha, Jung Yul(차정열)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/91307
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