后倾种植体应力分布的三维有限元分析

M. Shalaby, Hafez Bahnassawi, Y. Baraka
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引用次数: 0

摘要

目的:通过三维有限元分析,评价采用“全上四”概念治疗下颌全无牙嵴“体外研究”的固定种植体支持修复体的应力分布。材料和方法:在Autodesk Inventor中创建覆盖义齿、粘膜、种植体、角度基托、基牙、皮质骨和松质骨等有限元模型部件,并导出为SAT文件。在ANSYS环境下对这些部件进行了装配。模型在磨牙区分别承受垂直单侧和垂直双侧两种200N的载荷。结果:模型构件(覆盖义齿、种植体、斜基、基牙、皮质骨和松质骨)在各种载荷作用下的变形和应力值均在生理范围内。结论:磨牙区种植体倾斜不影响系统行为(未出现应力或变形峰值),在所有载荷作用下,模型部位(皮质骨、海绵骨、种植体、基牙、基牙、覆盖义齿)的变形和应力值均在生理范围内。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
3D Finite Elements Analysis of Stress Distribution on the Posterior Tilted Implants on all on 4 Concept
Objective: The purpose of this study was to evaluate the stress distribution of fixed implant-supported prostheses using “all-on-four” concept for the treatment of mandibular completely edentulous ridge “in vitro study” by 3D finite elements analysis . Materials and Methods: The finite element model components as the overdenture, mucosa, implants, angled base, abutment, cortical and cancellous bones were created in “Autodesk Inventor, then exported as SAT files. These components were assembled in ANSYS environment. The model was subjected to two loading conditions of 200N, vertically unilateral and, vertically bilateral at molar regions respectively. Results: All values of deformations and stresses appeared on the model components (overdenture, implants, angled base, abutment, cortical and cancellous bones) were within physiological limits under all loads application. Conclusion: Tilted implants at molar area did not affect the system behavior (did not show peak of stresses or deformation) and all values of deformations and stresses that appeared on the model parts (cortical, spongy bone, implant, base, abutment, and overdenture) were within physiological limits under all cases of load application.
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