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不同角度微种植体支抗不同载荷的三维有限元分析 被引量：4

A three-dimensional finite element analysis for orthodontic anchorage micro-implant with various degree and loading
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摘要 目的:建立微种植体正畸支抗的三维有限元模型,分析不同倾斜角度下植入微种植体时,不同载荷对种植体-骨界面的生物力学变化,为微种植体正畸支抗的临床应用提供理论依据。方法:利用计算机辅助设计和有限元软件处理,建立倾斜角度分别为30°,45°,60°,90°的4组微种植体支抗模型,分析在0.98N(100g力)、1.96N(200g力)、2.94N(300g力)、3.92N(400g力)水平力作用下,微种植体-骨界面应力及位移的分布情况。结果:不同角度不同载荷下微种植体颈部为应力集中区,Von-Mises应力及位移峰值随倾斜角度的增大而增大。微种植体90°植入,在3.92N(400g力)水平力作用下最大Von-Mises应力峰值为19.263MPa,最大位移峰值为1.2344μm。结论:微种植体可在90°内载荷3.92N(400g力)以内的水平向正畸力。减小微种植体的倾斜角度,可以提高其载荷水平向正畸力的能力,提示临床应选择尽量倾斜于颊侧牙槽骨的方向植入微支抗种植体。 Objective：To establish a three-dimensional finite element model for orthodontic anchorage micro-implant, and investigate the influence of different titled angles and loadings on the biomechanical characteristics of orthodontic anchorage implant-bone interface. Methods： CAD software and finite element analysis software were used to perform the finite element modeling of the micro-implant with 4 different rifled angles, including 30°,45°,60° and 96°. A simulated orthodontic force, which was 0.98N （100 grams）, 1.96 N （200 grams）,2.94 N（300 grams） and 3.92 N（400 grams） separately, was loaded mesiodistally to the mathematical models. The distributions of stress and displacement on the implant-bone interface were analyzed. Results：The neck of micro-implant was the stress＇ Concentration zone. As the titled angle and loading increased, the Von-Mises stress and displacement increased. The maximum Von-Mises stress value was 19.263 MPa and the maximum displacement value was 1.2344 μm when the implant was loaded 3.92 N （400 grams） mesiodistally in 90° angle. Conclusion：The micro-implant can be safely loaded with 3.92 N （400 grams） of mesiodistal orthodontic force under 90°angle. The decrease of the titled angle can efficaciously enhance the ability, implicating that the implant can bear a mesiodistal orthodontic force, and titled angle should be choose when the micro-implant is embedded.
作者 杨进 陈江 何炳蔚 窦宁 章非敏
机构地区 福建医科大学附属口腔医院种植中心 福州大学机械工程学院 南京医科大学附属口腔医院修复科
出处 《南京医科大学学报（自然科学版）》 CAS CSCD 北大核心 2009年第2期211-214,共4页 Journal of Nanjing Medical University(Natural Sciences)
基金 福建省卫生厅青年科学研究基金资助项目(编号:20060233)
关键词 微种植体 生物力学 有限元分析法 micro-implant anchorage（MIA） finite element analysis（FEA） biomechanics
分类号 R782.12 [医药卫生—口腔医学]
  • 相关文献

参考文献17

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共引文献95

同被引文献44

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引证文献4

二级引证文献9

南京医科大学学报（自然科学版）
2009年 第2期

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