Article Summary
刘靓1 胡学昱1 张蕾2 尤凤健1 黄景辉1 罗卓荆1.高仿真组织工程神经支架制备工艺的参数优化[J].现代生物医学进展英文版,2011,11(4):624-627.
高仿真组织工程神经支架制备工艺的参数优化
Parameter Optimization of the Fabrication Technique for Highly BionicTissue Engineering Nerve Scaffold
  
DOI:
中文关键词: 仿真神经支架  结构特征  孔径  醋酸  冷淋速度
英文关键词: Bionic nerve scaffold  Micro-structural characteristic  Pore size  Acetic acid  Freezing velocity
基金项目:国家自然科学基金资助项目(30770571和30973052)
Author NameAffiliation
LIU Liang1, HU Xue-yu1, ZHANG Lei2, YOU Feng-jian1, HUANG Jing-hui1, LUO Zhuo-jing1 第四军医大学西京医院全军骨科研究所 
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中文摘要:
      目的:对直接影响神经支架微观结构的关键因素进行分析,以确定制备不同孔径仿真支架的制备工艺。方法:用前期开发的 神经支架制备工艺,应用不同浓度的醋酸浓度和冷淋速度制备仿真神经支架,以扫描电镜观察神经支架结构特征,以确定醋酸浓 度和冷淋速度对神经支架内部结构的影响。结果:醋酸浓度和冷淋速度对神经支架内部结构具有重要影响。醋酸浓度为0mg/ml 时,无法制备定向结构的神经支架,当醋酸浓度为1 mg/ml、2 mg/ml、3 mg/ml 和4 mg/ml 时,可制备轴定向仿真支架,并且神经支 架的孔径随醋酸浓度增大而增大;当冷淋速度为1×10-5m/s、2×10-5m/s 和5×10-5m/s 时,所制备的仿真支架内部均呈明显的轴向 微管结构,其中冷淋速度为2×10-5m/s时,其轴向微管结构排列最为有序、规律。当速度为1×10-6m/s,2×10-6m/s,5×10-6m/s 以及 1×10-4m/s时,所制备的材料内部微管结构走向无明显规律。结论:醋酸浓度和冷淋速度是影响神经支架内部结构的两个关键因 素,通过改变醋酸浓度和冷淋速度可制备不同孔径的仿真神经支架。
英文摘要:
      Objective: To investigate the factors which influence the micro-structural characteristics of the highly bionic nerve scaffold, and to determine the technology for establishing bionic nerve scaffold with different micro-structural characteristics. Methods: Nerve scaffolds with different micro-structural characteristics were fabricated with varied doses of acetic acid and a series of freezing velocities. Scanning electron microscopy was used to detect the micro-structural characteristics. The effects of acetic acid concentration and freezing velocities on the structural appearance of the scaffolds were determined. Results: The concentration of the acetic acid and freezing velocities had effect on the micro-structural characteristics of the nerve scaffold. Scaffold with longitudinal pores could be fabricated in the presence of acetic acid (1 mg/ml, 2 mg/ml, 3 mg/ml and 4 mg/ml, except 0mg/ml), and the pore size increased with the increasing of the acetic acid concentration. In addition, highly bionic nerve scaffold could be made when the freezing velocities were maintained at 1×10-5m/s, 2×10-5m/s and 5×10-5m/s, of which the most homogeneous longitudinal pores were achieved by velocity at 2×10-5m/s. When the velocity was maintained at 1×10-6m/s, 2×10-6m/s, 5×10-6m/s and 1×10-4m/s, the scaffold showed no longitudinal pores. Conclusion: Acetic acid concentration and freezing velocities were two key factors determining the micro-structural characteristics of the highly bionic nerve scaffold. Scaffolds with different micro-structural appearances can be fabricated through changing the acetic acid concentration and freezing velocities.
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