Finite element analysis of stress at implant-bone interface of dental implants with different structures
Finite element analysis of stress at implant-bone interface of dental implants with different structures
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DOI：
10.1016/s1003-6326(11)60903-5
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发表时间：
2011-07-01
影响因子：
4.5
通讯作者：
Wang Rui-fang
中科院分区：
文献类型：
--
作者：
Chen Liang-jian;He Hao;Wang Rui-fang
研究了多孔钛种植体的结构、弹性模量和低模量层厚度对种植体-骨界面应力分布的影响。建立不同钛种植体的三维有限元模型。种植体结构包括全低模量型（1号）、仿生型（2号）、松质骨全低模量型（3号）和全致密型（4号）。采用Ansys ANSYS 10.0软件分析静态载荷下种植体-骨界面的应力分布。结果表明，界面应力的分布与种植体的结构密切相关。2号种植体松质骨和牙根区的最大应力低于其他三种种植体。低模量层模量的降低有利于界面应力的传递。增加低模量层的厚度可以减小应力并在界面处引起更均匀的应力分布。在四种种植体中，仿生型种植体2号在将种植体-骨界面应力传递到周围骨方面具有上级优势。
The effect of structure, elastic modulus and thickness of lower modulus layer in porous titanium implants on the stress distribution at the implant-bone interface was investigated. Three-dimensional finite element models of different titanium implants were constructed. The structures of the implants included the whole lower modulus style (No.1), bio-mimetic style (No.2), the whole lower modulus style in cancellous bone (No.3) and the whole dense style No.4. The stress distributions at bone-implant interface under static loading were analyzed using Ansys Workbench 10.0 software. The results indicated that the distribution of interface stress is strongly depended on the structure of the implants. The maximum stresses in cancellous bone and root region of implant No. 2 are lower than those in the other three implants. A decrease in the modulus of the low modulus layer facilitates the interface stress transferring. Increasing the thickness of the low modulus layer can reduce the stress and induce a more uniform stress distribution at the interface. Among the four implants, biomimetic style implant No. 2 is superior in transferring implant-bone interface stress to surrounding bones.