载荷强度对受载胫骨中骨陷窝-骨小管系统内溶质输运速率影响
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The influence from load strength on solute transport rate of lacunar-canalicular system in loaded tibia
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    摘要:

    目的 利用有限元法研究载荷强度对受载胫骨中骨陷窝-骨小管系统(lacunar-canalicular system,LCS)内溶质输运速率的影响。方法 基于成年鼠胫骨的micro-CT扫描图像,利用Mimics、Hypermesh、FEBio等软件建立其胫骨有限元模型,且视为均质的两相-溶质材料。通过设置3组不同扩散率(3、15、30 μm2/s)的溶质和载荷强度(0.2、2.0、5.0 N),得到输运速率和溶质扩散率以及载荷强度之间的关系。对比光脱色荧光恢复(fluorescence recovery after photobleaching, FRAP)实验数据与有限元法得到的结果,分析载荷刺激对输运增强率的影响。结果 输运速率均随着扩散率和载荷强度的增大而增大。通过与FRAP实验的数据进行比对发现,有限元法得到的结果基本符合溶质运移规律。结论 研究结果可为研究皮质骨深层区域的力响应以及流动性提供一定基础,也为进一步揭示骨再生机制提供借鉴。

    Abstract:

    Objective To study the influence from load strength on solute transport rate in lacunar-canalicular system (LCS) of loaded tibia using finite element method.Methods Based on micro-CT scan images of adult mice tibia, the finite element model of the tibia, which was regarded as being homogeneous biphasic-solute, was established by software of Mimics, Hypermesh and FEBio. The relationship between transport rate and solute diffusivity/load strength was obtained by setting 3 groups of different solute diffusivity (3, 15, 30 μm2/s) and load strength (0.2, 2.0, 5.0 N), respectively. By comparing the results from both fluorescence recovery after photobleaching (FRAP) experiment and finite element method, the effect of load stimulation on transport enhancement was analyzed. Results The transport rate increased with the increase of diffusion rate and load strength. The results from finite element method were basically consistent with the solute transport rules by comparing data from FRAP experiment. Conclusions The research findings can provide some basis for load response and liquidity in deep area of cortical bone, and for further revealing the mechanism of bone regeneration.

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王玉琨,樊黎霞.载荷强度对受载胫骨中骨陷窝-骨小管系统内溶质输运速率影响[J].医用生物力学,2015,30(6):515-520

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  • 收稿日期:2015-04-04
  • 最后修改日期:2015-05-23
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  • 在线发布日期: 2015-12-29
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