关节软骨分层结构逆力-电特性实验研究
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1.太原理工大学人工智能学院;2.骨与软组织损伤修复山西省重点实验室

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Experimental Study on the Layered Structure of Articular Cartilage Regarding Reverse Mechano-Electric Characteristics
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1.College of Artificial Intelligence,Taiyuan University of Technology;2.Shanxi Provincial Key Laboratory for Repair of Bone and Soft Tissue Injury

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    摘要:

    目的:关节软骨基本结构可分为上层、中层和下层(上层约20%、中层约50%、下层约30%),因其组成和结构的不同,力-电特性也不相同,本文针对关节软骨分层结构逆力-电效应及其影响因素开展分析研究。方法:将软骨样品根据其生理厚度(上层约0.4 mm、中层约1mm、下层约0.6mm),通过在无接触外加电场的测试方法来分析各影响因素对关节软骨逆向力-电效应的影响。结果:在电场间距减小、含水率升高、离体时间减少的情况下,正常分层软骨在无接触电场中所产生的位移分别增大约18 μm、10 μm、15 μm;在模拟关节炎的缺损状况下,随缺损深度增加、缺损半径的增大,整个关节软骨的偏转挠度减小约7 μm。结论:三层软骨的逆力-电效应不同,在含水率90%,电场间距7 mm,离体12 h后表现为偏转挠度中层最大。

    Abstract:

    Objective The fundamental structure of articular cartilage comprises three layers: the upper layer (UL, approximately 20%), the middle layer (ML, approximately 50%), and the lower layer (LL, approximately 30%). Owing to their distinct compositions and structures, the mechano-electric characteristics of these layers differ, this study delves into the analysis of the inverse mechano-electric effect of the layered structure of articular cartilage and its influencing factors. Method The cartilage samples are classified according to their physiological thickness (approximately 0.4 mm for the upper layer, 1 mm for the middle layer, and 0.6 mm for the lower layer). Through a non-contact external electric field testing method, this study aims to analyze how different influencing factors affect the inverse mechano-electric effect of articular cartilage. Results In conditions where the electric field spacing decreases, water content increases, and in vitro time decreases, normal layered cartilage demonstrates an increasing trend by about 18 μm、10 μm、15 μm in displacement generated in a non-contact electric field. In simulated arthritis defect scenarios, as the defect depth and radius increase, the overall deviation deflection of the articular cartilage gradually decreases by about 7μm. Conclusion The three layers of cartilage differed in their inverse mechano-electricity effect, showing the greatest deflection mid-layer at 90% water content, 7 mm electric field spacing, and after 12 h of ex vivo.

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  • 收稿日期:2025-02-05
  • 最后修改日期:2025-03-24
  • 录用日期:2025-03-25
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