基于正交试验的梯度多孔种植体结构设计

Liangtao Wang, Shan Li, Doudou Lu, Zheng Chen
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引用次数: 0

摘要

目的:为了解决目前固体种植体弹性模量过高导致的松动和脱位问题,我们尝试研究一种可以降低应力集中和弹性模量的梯度多孔种植体:方法:利用 SolidWorks 软件设计梯度多孔种植体的基台和机械结构。采用正交实验设计,从孔形、孔径、孔层高度和周向分布四个方面评估了梯度多孔种植体的力学性能。利用 ANSYS 软件评估了不同结构组合参数下种植体及其周围骨组织的 Von-Mises 应力分布,从而得出梯度多孔种植体的最佳参数组合:孔形状、孔直径、孔层高度和孔分布这四个因素对种植体最大 Von-Mises 应力的影响如下。随着孔隙形状变小和周向分布减小,Von-Mises 应力明显减小。孔直径从 500 μm 到 600 μm,再到 700 μm。Von-Mises 应力先减小后增大。结论:梯度多孔植入物的最终最佳参数组合如下:方形孔隙形状、孔隙直径为 600 μm、多孔层高度为 3 mm、孔隙分布为二次阶梯。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structural design of gradient porous dental implant based on orthogonal test.

Objectives: To solve the current problems of loosening and dislodging caused by the high elastic modulus of solid implants, we attempted to study a gradient porous dental implant that can lower the stress concentration and reduce the elastic modulus.

Methods: SolidWorks software was utilized to design the abutment and mechanical structure of the gradient porous implant. The mechanical properties of the gradient porous implant were evaluated by an orthogonal experimental design from four aspects: pore shape, pore diameter, porous layer height, and circumferential distribution. ANSYS software was used to evaluate the distribution of Von-Mises stress in the implant and its surrounding bone tissues under different structural combination parameters to derive the optimal combination of gradient porous implant parameters.

Results: The effects of the four factors, namely, pore shape, pore diameter, porous layer height and pore distribution, on the maximum Von-Mises stress on the implant were as follows. As the pore shape became smaller and the circumferential distribution decreased, the Von-Mises stress decreased significantly. The pore diameter went from 500 μm to 600 μm and then to 700 μm. The Von-Mises stress decreased and then increased. It increased with the increase in the height of the porous layer.

Conclusions: The final optimal combination of parameters for the gradient porous implant was as follows: square pore shape, pore diameter of 600 μm, porous layer height of 3 mm, and quadratic step in pore distribution.

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