不同形态的氧化锆陶瓷桩对牙本质应力的三维有限元分析

口腔医学研究 ›› 2015, Vol. 31 ›› Issue (11): 1104-1107.

不同形态的氧化锆陶瓷桩对牙本质应力的三维有限元分析

郭彬¹,谢伟丽^1*,刘一志²,孙亚杰¹,陈兰竹¹,李雅静¹,刘滋川¹,艾振龙¹

1. 哈尔滨医科大学附属口腔医学院口腔修复科黑龙江哈尔滨 150000;
2. 哈尔滨工业大学航天科学与力学系

收稿日期:2015-07-16 出版日期:2015-11-28 发布日期:2016-03-21
通讯作者: 谢伟丽,电话:0451-85553231
作者简介:郭彬(1989~),男,辽宁人,医师,硕士,主要从事口腔生物材料与力学方面的研究。
基金资助:
黑龙江省科技攻关项目(编号:GC12C305-3)

Three Dimensional Finite Element Analysis of Different Forms of Zirconia Posts on the Stress Distribution of Dentin.

GUO Bin¹, XIE Wei-li¹, LIU Yi-zhi², SUN Ya-jie¹, CHEN Lan-zhu¹, LI Ya-jing¹, LIU Zi-chuan¹, AiI Zhen-long¹.

1. Department of Prosthodontics, College of Stomotology, Harbin Medical University, Harbin 150001, China; 2. Department of Astronautic Science and Mechanics, Harbin Institute of Technology, Harbin 150001, China

Received:2015-07-16 Online:2015-11-28 Published:2016-03-21

摘要/Abstract

摘要： 目的:通过三维有限元分析的方法模拟牙体组织的力学组成,分析不同形态的氧化锆陶瓷桩修复上颌中切牙后对周围剩余牙本质的应力分布规律。方法:根据成年男性上颌中切牙的标准数据,通过ANSYS 12.0软件直接建立平行桩、锥形桩、末端锥形桩3种不同形态的氧化锆陶瓷桩修复上颌中切牙的三维有限元模型;对建立的模型进行网格划分;通过加载边界条件,设定模型主参数以及加载静态载荷;分析牙本质内的Von Mises应力的分布规律,观察不同形态的桩核对其周围剩余牙本质的影响。结果:成功建立了不同形态的氧化锆陶瓷桩核和牙根的三维有限元模型;柱形桩和锥形桩的牙本质应力分布沿牙本质界面向牙颈部逐渐增大达高峰,末端锥形桩应力最高峰在根末1/3;锥形桩所受的牙本质应力大于柱形桩,且锥度越大,受到的应力也相应越大。结论:柱形桩组所受应力值均小于锥形桩组,末端锥形桩组在牙根部应力值最大;选择氧化锆材料时,柱形桩为最佳设计。

Abstract: Objective: To analyze the stress distribution of remaining dentin after restored maxillary middle incisor with different forms of zirconia posts by simulating the mechanics of body tissue with three dimensional finite element analysis. Methods: According to the standard data of adult male maxillary incisor, three-dimensional finite element models of zirconia post-and-core with parallel post, tapered post or post tapered at one end repairing for maxillary middle incisor were established and meshed using the ANSYS 11.0 software. By loading boundary conditions, the main parameters of the models were set and the static load was applied. The distribution laws of Von Mises stress in dentine were analyzed. The effect of the posts with different forms on residual dentine was evaluated. Results: The models were successfully established. The dentin stress of cylindrical post and tapered post gradually increased to the peak along the dentin boundary to the tooth neck, and the maximum dentine stress of post tapered at one end was in the apical third. The dentin stress of taper post was greater than that of cylinder post, which increased with increasing taper degree. Conclusion: The stress value of cylindrical post was lower than that of taper post. The stress value of post tapered at one end was concentrated in the apical third. Cylindrical post was the best design when choosing zirconia materials.

中图分类号:

R783.1

郭彬,谢伟丽,刘一志,孙亚杰,陈兰竹,李雅静,刘滋川,艾振龙. 不同形态的氧化锆陶瓷桩对牙本质应力的三维有限元分析[J]. 口腔医学研究, 2015, 31(11): 1104-1107.

GUO Bin, XIE Wei-li, LIU Yi-zhi, SUN Ya-jie, CHEN Lan-zhu, LI Ya-jing, LIU Zi-chuan, AiI Zhen-long.. Three Dimensional Finite Element Analysis of Different Forms of Zirconia Posts on the Stress Distribution of Dentin.[J]. Journal of Oral Science Research, 2015, 31(11): 1104-1107.

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