Finite element analysis of miniscrew implants used for orthodontic anchorage

Te Chun Liu, Chih Han Chang, Tung Yiu Wong, Jia Kuang Liu

研究成果: Article同行評審

44 引文 斯高帕斯(Scopus)

摘要

Introduction: The miniscrew has been developed and effectively used as orthodontic anchorage, but current studies of its usage are insufficient to provide information about the underlying mechanical mechanisms. The aim of this study was to investigate the roles of bone quality, loading conditions, screw effects, and implanted depth on the biomechanics of an orthodontic miniscrew system by using finite element analysis. Methods: A 3-dimensional model with a bone block integrated with a miniscrew was constructed to simulate various cortex thicknesses, cancellous bone densities, force magnitudes and directions, screw diameters and lengths, and implanted depths of miniscrews. Results: Both stress and displacement increased with decreasing cortex thickness, whereas cancellous bone density played a minor role in the mechanical response. These 2 indexes were linearly proportional to the force magnitude and produced the highest values when the force was perpendicular to the long axis of the miniscrew. A wider screw provided superior mechanical advantages. The exposed length of the miniscrew was the real factor affecting mechanical performance. Conclusions: The screw diameter was the dominant factor for minscrew mechanical responses. Both bone stress and screw displacement decreased with increasing screw diameter and cortex thickness, and decreasing exposed length of the screw, force magnitude, and oblique loading direction.

原文English
頁(從 - 到)468-476
頁數9
期刊American Journal of Orthodontics and Dentofacial Orthopedics
141
發行號4
DOIs
出版狀態Published - 2012 四月

All Science Journal Classification (ASJC) codes

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