密质骨建模方式对国人第95百分位骨盆生物力学响应的影响
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Effects of Cortical Bone Modeling Methods on Biomechanical Responses of Chinese 95th Percentile Pelvis Finite Element Model
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    摘要:

    目的 构建国人第95百分位具有真实解剖学结构的骨盆有限元模型,探究密质骨建模方式对真实骨盆整体生物力学响应的影响。方法基于95百分位男性志愿者骨盆医学影像数据,构建以六面体单元为主的具有真实髋骨密质骨厚度(REA-M)和2 mm均匀密质骨厚度(CON-M)骨盆有限元模型,采用仿真方法重构尸体试验加载工况,通过对比试验结果和仿真结果验证模型的有效性,并探究两种模型在不同工况下的生物力学响应差异。结果 仿真结果表明,两种骨盆模型的整体力学响应与尸体试验结果存在较强相关性,且两种模型之间的力学响应差距多在8%之内,二者的相关性评分差值小于2%。结论 通过重构多个仿真试验验证了本文所建CON-M和REA-M两种骨盆模型的有效性,两种模型的生物力学响应有差异,但力学响应差异较小。从简化模型的角度,可以使用CON-M模型研究骨盆的生物力学响应。

    Abstract:

    Objective The finite element pelvis model with detailed anatomical structures which meets the Chinese human 95th percentile characteristics is developed, and the influence of cortical bone modeling methods on the biomechanical response of the real pelvis is explored. Methods Based on the pelvic medical images of a 95th percentile male volunteer, the two finite element pelvis models with real hip bone cortical bone thickness (REA-M) and 2 mm uniform cortical bone thickness (CON-M) dominated by hexahedral elements were constructed. Using simulation methods to reconstruct the loading conditions of cadaver experiments, the validation of models was verified by comparing the experimental results and simulation results, and biomechanical response differences of the two models under different working conditions were discussed. Results The simulation data showed that there was a strong correlation between overall biomechanical responses of the two pelvic models and the cadaver experiment, and the mechanical response difference between the two models was mostly within 8%, and the correlation score difference between the two models was smllaer than 2%. Conclusions The validation of the two pelvic models established in this study is verified by rebuilding multiple simulation experiments. Although biomechanical responses of the two models are different, the difference in the mechanical responses of CON-M and REA-M models were small. From the perspective of model simplification, the CON-M model can be used to study the biomechanical response of the pelvis.

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崔世海,陈威佐,李海岩,贺丽娟,吕文乐.密质骨建模方式对国人第95百分位骨盆生物力学响应的影响[J].医用生物力学,2025,40(1):187-193

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  • 收稿日期:2024-09-06
  • 最后修改日期:2024-10-08
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  • 在线发布日期: 2025-02-26
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