摘要
目的分析螺纹深度变化对微种植体及颌骨上的应力分布和位移的影响,为支抗微种植体的临床选择和优化设计提供理论参照。方法运用Pro/E软件建立不同螺纹深度的微种植体和下颌骨三维有限元模型,用Hypermesh软件对该模型进行网格划分,并在微种植体顶部施加与颌骨面平行的正畸力2.94N,用ANSYS软件进行三维模拟计算。结果微种植体-骨界面应力峰值集中在骨密质内,当螺纹深度为0.3mm时,微种植体颈部及其相邻颌骨面的Von-mises应力峰值最小,为18.12MPa;螺纹深度为0.4mm时,应力峰值最大,为60.28MPa。结论螺纹深度影响微种植体和颌骨的应力分布,在本实验条件下,螺纹深度为0.3mm时,微种植体-骨界面、微种植体上的应力和位移分布最优。
Objective In this work, we aimed to analyse the influence of microimplant thread depth on stress and displacement distribution on microimplant and mandible and apply the theoretical reference in choosing orthodontic anchorage microimplant and optimising its design. Methods The 3D finite element models of the microimplants with different thread depths and mandibles were established using Pro/E. The elements were divided using Hypermesh, and results were calculated using the ANSYS software. The force of 2.94 N which was parallel to the mandible surface was applied on the top of the microimplant. Results The maximum Von-mises stress on the microimplant-bone interface focused on the cortical bone. The model with thread depth of 0.3 mm had the smallest Von-mises stress peak of 18.12 MPa on the microimplant neck and its nearby bone, whereas the largest Von-mises stress peak of 60.28 MPa occurred in the model with the thread depth of 0.4 mm. Conclusion The microimplant thread depth influenced the stress distribution on the microimplant and mandible. The stress and displacement distributions on microimplant-bone interface and microimplant were at the optimum when the tread depth was 0.3 mm among all the cases mentioned in this work.
作者
颜丹
张锡忠
王建国
Yan Dan;Zhang Xizhong;Wang Jianguo(Dept. of Tongji West Clinic,Foshan Stomatological Hospital,School of Stomatology and Medicine,Foshan University,Foshan 528000,China;Dept. of Orthodontics,Tianjin Stomatological Hospital,Tianjin 300041,China)
出处
《国际口腔医学杂志》
CAS
CSCD
2019年第4期387-392,共6页
International Journal of Stomatology
基金
佛山市医学类科技攻关项目(2017AB001881)
佛山市卫生和计划生育局医学科研课题(20180158)~~
关键词
有限元分析
应力
正畸支抗
微种植体
螺纹深度
finite element analysis
stress
orthodonticanchorages
microimplant
thread depth
