从模型验证到生物力学分析：使用三维有限元分析的多根根模拟种植体的计算机研究。

IF 3.3 2区医学 Q2 ENGINEERING, BIOMEDICAL

Journal of the Mechanical Behavior of Biomedical Materials Pub Date : 2025-01-18 DOI:10.1016/j.jmbbm.2025.106896

Mostafa Aldesoki , Ludger Keilig , Abdulaziz Alhotan , Al-Hassan Diab , Tarek M. Elshazly , Christoph Bourauel

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引用次数: 0

摘要

目的：建立一个有效的三维有限元模型，并应用它来检查多根根模拟种植体（RAIs）的生物力学行为。方法：在先前进行的体外研究的基础上，开发了一个由RAI或螺纹植入物（TI）和理想骨块组成的有效有限元模型。所有的实验边界条件和材料性质都得到了再现。绘制力/位移曲线以确保与体外结果完全一致。在验证了有限元模型之后，调整了材料性能以与文献中报道的性能保持一致。然后检查了两种接触方案：立即放置触摸接触和骨整合胶合接触。骨块在各个方向受到约束，沿种植体长轴施加300 N点载荷，角度为30°。评估等效应力、最大主应力、微应变和位移的结果值。结果：数值模型与实验结果高度一致，特别是在加载方向(Z)的位移方面。应用有限元分析的结果表明，rai总体上优于TIs。RAI表现出较低的等效应力，轴向加载为3.3 MPa，斜向加载为13.1 MPa，而TI分别为5.4 MPa和29.5 MPa。斜向加载下，RAI的微应变值为4000 με，而TI的微应变值为13000 με。此外，与TI相比，RAI具有较低的微动值，具有较好的一级和二级稳定性。结论：根模拟种植体与传统的螺纹种植体相比，具有更好的生物力学性能，应力分布更均匀，稳定性更强，是一种很有前景的替代方法。

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From model validation to biomechanical analysis: In silico study of multirooted root analogue implants using 3D finite element analysis

Objectives

To create a validated 3D finite element model and employ it to examine the biomechanical behaviour of multirooted root analogue implants (RAIs).

Methods

A validated finite element model comprising either an RAI or a threaded implant (TI) and an idealised bone block was developed based on a previously conducted in vitro study. All the experimental boundary conditions and material properties were reproduced. Force/displacement curves were plotted to ensure complete alignment with the in vitro findings. Following the validation of the FE model, the material properties were adjusted to align with those reported in the literature. Two contact scenarios were then examined: immediate placement with touching contact and osseointegration with glued contact. The bone block was constrained in all directions, and a 300 N point load was applied along the long axis of the implant, and with an angulation of 30°. The resulting values for equivalent stress, maximum principal stress, microstrain, and displacement were evaluated.

Results

The numerical model demonstrated a high degree of agreement with the experimental results, particularly regarding displacement in the loading direction (Z). The findings of the applied FEA indicated that RAIs generally outperformed TIs. The RAI exhibited lower equivalent stress, with values of 3.3 MPa for axial loading and 13.1 MPa for oblique loading, compared to 5.4 MPa and 29.5 MPa for the TI, respectively. Furthermore, microstrain was observed to be lower in the RAI, with a value of 4,000 με compared to 13,000 με in the TI under oblique loading. Additionally, the RAI exhibited superior primary and secondary stability, with lower micromotion values compared to the TI.

Conclusions

The root analogue implant showed superior biomechanical performance, with more uniform stress distribution and greater stability compared to the conventional threaded implant, positioning it as a promising alternative.

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来源期刊

Journal of the Mechanical Behavior of Biomedical Materials 工程技术-材料科学：生物材料

CiteScore

7.20

自引率

7.70%

发文量

505

审稿时长

46 days

期刊介绍： The Journal of the Mechanical Behavior of Biomedical Materials is concerned with the mechanical deformation, damage and failure under applied forces, of biological material (at the tissue, cellular and molecular levels) and of biomaterials, i.e. those materials which are designed to mimic or replace biological materials. The primary focus of the journal is the synthesis of materials science, biology, and medical and dental science. Reports of fundamental scientific investigations are welcome, as are articles concerned with the practical application of materials in medical devices. Both experimental and theoretical work is of interest; theoretical papers will normally include comparison of predictions with experimental data, though we recognize that this may not always be appropriate. The journal also publishes technical notes concerned with emerging experimental or theoretical techniques, letters to the editor and, by invitation, review articles and papers describing existing techniques for the benefit of an interdisciplinary readership.