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中国医药导刊 ›› 2023, Vol. 25 ›› Issue (12): 1294-1296.

• 管理实践 • 上一篇    

种植体支抗辅助正畸磨牙应力变化的三维有限元模型效果研究#br#

任雪芬, 王帅*   

  1. 延安大学咸阳医院口腔科, 陕西 咸阳 712000
  • 收稿日期:2021-10-18 修回日期:2023-12-15 出版日期:2023-12-28 发布日期:2024-02-18
  • 基金资助:
    陕西省社会发展科技攻关项目(项目编号;2016SF-106;项目名称:GLP-1受体激动剂利拉鲁肽激活AMPK抑制糖尿病大鼠血管平滑肌细胞KCa3.1表达的机制研究)

Study on the Stress Changes of Orthodontic Molars Supported by Implant Anchorage by Three-Dimensional Finite Element Model#br#

  1. Dental Department, Xianyang Hospital of Yan′an University,Shaanxi Xianyang 712000, China
  • Received:2021-10-18 Revised:2023-12-15 Online:2023-12-28 Published:2024-02-18

摘要: 目的:建立种植体支抗辅助正畸磨牙应力变化的三维有限元模型,分析种植体-骨界面的生物力学特征变化。方法:采用ANSYS软件建模,选择纯钛种植体,将其种植到牙槽骨之后,外留3 mm,周围骨皮质厚度1 mm,皮质连续均匀;下为连续骨松质。选择施加200 g水平作用力,观察30°、45°、60°、75°、90°共计5个角度下的Von-Mises 综合应力及位移(平均位移和峰值位移)。结果:在200 g水平作用力下,随倾斜角度增加,Von-Mises综合应力递减,平均位移也逐渐减小。在30°、45°、60°、75°、90°的Von-Mises 综合应力分别为1.3184、1.1834、0.9384、0.7341、0.5184 Mpa;平均位移分别为6.1934、5.0413、3.9475、3.2851、2.4852 μm。在200 g水平作用力下,不同角度之间的位移峰值均较小,最大不超过6.9453 μm。结论:磨牙种植体在200 g水平力的作用下能够保持稳定,具有一定的稳定性,用于磨牙的正畸效果较好。
  

关键词: 种植体, 正畸磨牙, 生物力学, 三维有限元模型

Abstract: Objective: To establish a three-dimensional finite element model of stress changes of orthodontic molars supported by implant anchorage, and to analyze the changes in the biomechanical characteristics of the implant-bone interface. Methods: Modeled with ANSYS software,a pure titanium implant was selected and implanted into the alveolar bone, leaving 3 mm outside, and the thickness of the surrounding bone cortex was 1mm.The cortex was continuous and uniform, and the lower part was continuous bone cancellous.Choose to apply 200 g horizontal force and observe the Von-Mises comprehensive stress and displacement (average displacement and peak displacement) at five angles of 30°, 45°, 60°, 75° and 90°. Results: Under the horizontal force of 200 g, as the inclination angle increased, the comprehensive stress of Von-Mises decreased, and the average displacement gradually decreased. At 30°, 45°, 60°, 75°and 90°, the Von-Mises comprehensive stress is 1.3184,1.1834,0.9384,0.7341,0.5184 Mpa, and the average displacements are 6.1934, 5.0413, 3.9475, 3.2851, 2.4852 μm. Under the 200 g horizontal force, the peaks of displacement between different angles are small, and the maximum does not exceed 6.9453 μm. Conclusion: Molar implants can maintain stability under the action of a horizontal force of 200 g, have certain stability, and have good orthodontic effects for molars.

Key words: Implant, Orthodontic molar, Biomechanics, Three-dimensional finite element model

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