Correlation between insertion torque and peri-implant bone strain during placement of orthodontic mini-implants: A finite element study

皮质骨 植入 拉伤 扭矩 材料科学 有限元法 插入损耗 牙槽 生物医学工程 牙科 口腔正畸科 结构工程 解剖 医学 外科 物理 工程类 热力学 光电子学
作者
Bui Quang Hung,Wonjae Yu,Hyo‐Sang Park,Hee‐Moon Kyung,Mihee Hong
出处
期刊:American Journal of Orthodontics and Dentofacial Orthopedics [Elsevier BV]
卷期号:161 (2): 248-254 被引量:4
标识
DOI:10.1016/j.ajodo.2020.07.042
摘要

Insertion torque is the amount of torque exerted on the implant to tighten into the bone. We investigated whether insertion torque values could be correlated with the strain level in the peri-implant cortical bone resulting from mini-implant insertion.The insertion of a standard size mini-implant (φ 1.4 mm × 7 mm) into maxillary alveolar bone was simulated using the finite element method. A total of 3600 calculation steps were employed to numerically reproduce the mini-implant insertion process and analyze the insertion torque and strain distribution in bone. Special attention was given to the relationship between insertion torque values and strain level in the cortical bone at the final tightening. The strain level was quantified using the following 3 strain parameters: (1) average insertion strain, (2) peak insertion strain recorded near the mini-implant thread tips, and (3) the size of the damage zone in the cortical bone. Correlations between the insertion torque values and these 3 parameters were analyzed using linear regression.Direct proportionality and strong correlation were found between the insertion torque values and each of the 3 strain parameters: average insertion strain (r2 = 0.91), peak insertion strain (r2 = 0.91), and the size of damage zone (r2 = 0.90) in the peri-implant cortical bone.The results of this finite element method study demonstrated that insertion torque could serve as a reliable indicator of the strain level in the peri-implant cortical bone resulting from mini-implant insertion.
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