基台缓冲层对种植体应力分布影响的三维有限元分析
[Three-dimensional finite element analysis of the influence of an abutment buffer layer on implant stress distribution].
作者信息
Zhang Shuai, Lü Chuan, Li Jin-Hong, Zhu Bao-Min, Wang Wei-Qian
机构信息
School/Hospital of Stomatology, Zhejiang Chinese Medical University, Hangzhou 310053, China.
Hangzhou Dongning Road Dental Clinic, Hangzhou 310017, China.
出版信息
Hua Xi Kou Qiang Yi Xue Za Zhi. 2020 Oct 1;38(5):537-540. doi: 10.7518/hxkq.2020.05.011.
OBJECTIVE
To study the stress distribution under dynamic loading in the presence or absence of an abutment buffer layer by using three-dimensional finite element analysis.
METHODS
A three-dimensional solid geometric model of an implant in a human mandible was established on the basis of CT scan data. A buffer-free abutment prosthesis and a buffer-abutment abutment prosthesis were installed above the implant. The buffer layer was made of high-density polyethylene. A vertical load of 200 N and a horizontal load of 100 N (45°) were concentrated on the centers of the implant restorations of the two groups. Stresses on the implant neck and body, abutment neck and body, central bolt neck and body, and bone interface were compared via three-dimensional finite element analysis.
RESULTS
Stresses on the implant neck and body, abutment neck and body, central bolt neck and body, and bone interface on the abutment with a buffer layer were significantly lower than those on the abutment without a buffer layer.
CONCLUSIONS
The increase in the buffer layer of the abutment neck significantly reduced stress on the implant neck, abutment, central bolt neck, and bone interface.
目的
通过三维有限元分析研究有无基台缓冲层时动态载荷下的应力分布。
方法
基于CT扫描数据建立人下颌骨种植体的三维实体几何模型。在种植体上方安装无缓冲基台修复体和带缓冲基台修复体。缓冲层由高密度聚乙烯制成。两组种植体修复体中心分别施加200 N垂直载荷和100 N（45°）水平载荷。通过三维有限元分析比较种植体颈部和体部、基台颈部和体部、中心螺栓颈部和体部以及骨界面的应力。
结果
带缓冲层基台上种植体颈部和体部、基台颈部和体部、中心螺栓颈部和体部以及骨界面的应力显著低于无缓冲层基台。
结论
基台颈部缓冲层的增加显著降低了种植体颈部、基台、中心螺栓颈部和骨界面的应力。
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