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http://dx.doi.org/10.4041/kjod.2009.39.4.203

Finite element analysis of cortical bone strain induced by self-drilling placement of orthodontic microimplant  

Park, Jin-Seo (Department of Orthodontics, School of Dentistry, Kyungpook National University)
Yu, Won-Jae (Department of Orthodontics, School of Dentistry, Kyungpook National University)
Kyung, Hee-Moon (Department of Orthodontics, School of Dentistry, Kyungpook National University)
Kwon, Oh-Won (Department of Orthodontics, School of Dentistry, Kyungpook National University)
Publication Information
The korean journal of orthodontics / v.39, no.4, 2009 , pp. 203-212 More about this Journal
Abstract
Objective: The aim of this study was to evaluate the strain induced in the cortical bone surrounding an orthodontic microimplant during insertion in a self-drilling manner. Methods: A 3D finite element method was used to simulate the insertion of a microimplant (AbsoAnchor SH1312-7, Dentos Co., Daegu, Korea) into 1 mm thick cortical bone. The shape and dimension of thread groove in the center of the cortical bone produced by the cutting flute at the apical of the microimplant was obtained from animal test using rabbit tibias. A total of 3,600 analysis steps was used to calculate the 10 turns and 5 mm advancement of the microimplant. A series of remesh in the cortical bone was allowed to accommodate the change in the geometry accompanied by the implant insertion. Results: Bone strains of well higher than 4,000 microstrain, the reported upper limit for normal bone remodeling, were observed in the peri-implant bone along the whole length of the microimplant. Level of strains in the vicinity of either the screw tip or the valley part were similar. Conclusions: Bone strains from a microimplant insertion in a self-drilling manner might have a negative impact on the physiological remodeling of cortical bone.
Keywords
Microimplant; Self drilling placement; Strain during insertion; 3D finite element method;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 4  (Related Records In Web of Science)
Times Cited By SCOPUS : 5
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