文章摘要
杨 进,陈 江,何炳蔚,窦 宁,章非敏.不同角度微种植体支抗不同载荷的三维有限元分析[J].南京医科大学学报,2009,29(2):211~214
不同角度微种植体支抗不同载荷的三维有限元分析
A three-dimensional finite element analysis for orthodontic anchorage micro-implant with various degree and loading
投稿时间:2008-10-21  
DOI:10.7655
中文关键词: 微种植体  生物力学  有限元分析法
英文关键词: micro-implant anchorage(MIA)  finite element analysis(FEA)  biomechanics
基金项目:福建省卫生厅青年科学研究基金资助项目(编号:20060233)
作者单位
杨 进 福建医科大学附属口腔医院种植中心,福建 福州 350002 
陈 江 福建医科大学附属口腔医院种植中心,福建 福州 350002 
何炳蔚 福州大学机械工程学院,福建 福州 350002 
窦 宁 福州大学机械工程学院,福建 福州 350002 
章非敏 南京医科大学附属口腔医院修复科,江苏 南京 210029 
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中文摘要:
      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0.98 N(100 g力)?1.96 N(200 g力)?2.94 N(300 g力)?3.92 N (400 g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3.92 N(400 g力)水平力作用下最大Von-Mises应力峰值为19.263 MPa,最大位移峰值为1.234 4 μm?结论:微种植体可在90°内载荷3.92 N(400 g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?
英文摘要:
      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 titled angles, including 30°,45°,60° and 90°. 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.
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