J Biomed Mater Res A:基于三维打印和定向冷冻技术的仿生组织工程软骨支架的构建

2020-04-30 MedSci原创 MedSci原创

关节软骨(AC)在力学和组织学上都具有梯度特征,再生能力较差。对于AC的修复,给研究和临床带来了困难。本文提出了一种基于聚(乳酸-Co-glycolic acid)(PLGA)-细胞外基质的梯度支架。

关节软骨(AC)在力学和组织学上都具有梯度特征,再生能力较差。对于AC的修复,给研究和临床带来了困难。本文提出了一种基于聚(乳酸-Co-glycolic acid)(PLGA)-细胞外基质的梯度支架。

 

通过三维打印的方式,用PLGA制造了具有三层梯度结构的软骨支架,并通过脱细胞外基质注入和定向冷冻的方式,实现了微结构取向和孔隙制造。

 

结果显示,制造的支架具有接近真实软骨的机械强度。通过材料力学公式对杨氏模量和剪切模量进行了定量优化,由于采用一次性成型工艺,获得了更精确的力学仿生和更稳定的界面性能。同时,支架具有仿生和梯度的微观结构取向和孔隙度,通过冻箱设计和温度模拟,可以定量优化分层率。

 

总的来说,本文提供了一种通过力学和组织学以及仿生多材料支架优化AC支架的方法。本论文对细胞培养和临床移植实验具有重要意义。

 

原始出处:

 

Yuanyuan XuXiao Guo, et al., Construction of Bionic Tissue Engineering Cartilage Scaffold Based on Three-Dimensional Printing and Oriented Frozen Technology. J Biomed Mater Res A. 2018 Jun;106(6):1664-1676. doi: 10.1002/jbm.a.36368. Epub 2018 Mar 5.

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    2021-03-03 liao1632
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    2020-08-05 sunylz
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    2020-05-02 lixiaol
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    2020-05-02 lixiaol
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    2020-05-02 智慧医人

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