中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (12): 1805-1811.doi: 10.3969/j.issn.2095-4344.2015.12.001

• 组织工程骨及软骨材料 tissue-engineered bone and cartilage materials •    下一篇

不同比例聚乳酸羟基乙酸复合骨支架的低温沉积制造及性能

胡 涛,徐铭恩,严 明,郭 淼,石 然,周青青   

  1. 杭州电子科技大学生物医学工程与仪器研究所,浙江省杭州市  310018
  • 修回日期:2015-02-11 出版日期:2015-03-19 发布日期:2015-03-19
  • 通讯作者: 徐铭恩,教授,杭州电子科技大学生物医学工程与仪器研究所,浙江省杭州市 310018
  • 作者简介:胡涛,男,1989年生,浙江省东阳市人,汉族,杭州电子科技大学生命信息与仪器工程学院在读硕士,主要从事组织工程3D打印研究。
  • 基金资助:

    国家自然科学基金(KYZ193713071);杭州电子科技大学信息化课程建设项目(PPKC2014ZD005)

Low-temperature deposition manufacturing and property of polylactic-co-glycolic acid composite scaffolds at different ratios

Hu Tao, Xu Ming-en, Yan Ming, Guo Miao, Shi Ran, Zhou Qing-qing   

  1. Institute of Biomedical Engineering and Instrumentation, Hangzhou Dianzi University, Hangzhou 310018, Zhejiang Province, China
  • Revised:2015-02-11 Online:2015-03-19 Published:2015-03-19
  • Contact: Xu Ming-en, Professor, Institute of Biomedical Engineering and Instrumentation, Hangzhou Dianzi University, Hangzhou 310018, Zhejiang Province, China
  • About author:Hu Tao, Studying for master’s degree, Institute of Biomedical Engineering and Instrumentation, Hangzhou Dianzi University, Hangzhou 310018, Zhejiang Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. KYZ193713071; the Information Technology Course Construction Project of Hangzhou Dianzi University, No. PPKC2014ZD005

摘要:

背景:研究证实,在聚乳酸羟基乙酸中加入磷酸三钙或珍珠粉可以使两者的性能互补,不仅为细胞提供良好的生长环境,而且能使细胞更快、更好地生长。
目的:通过低温层积制造技术制备以聚乳酸羟基乙酸为基体、复合珍珠粉或磷酸三钙的支架材料。
方法:采用低温层积制造技术制备聚乳酸羟基乙酸与珍珠粉或磷酸三钙质量比分别为10∶0、5∶2、7∶3和6∶4的聚乳酸羟基乙酸/珍珠粉或聚乳酸羟基乙酸/磷酸三钙复合支架,检测支架的微观结构、接触角、压缩弹性模量。将生长至基本融合的MC3T3-E1细胞以1×104/cm3的密度接种至纯聚乳酸羟基乙酸无孔支架、纯聚乳酸羟基乙酸有孔支架、5∶2聚乳酸羟基乙酸/珍珠粉和5∶2聚乳酸羟基乙酸/磷酸三钙支架上,接种1,3 h,采用流式细胞仪检测细胞黏附率;接种1,4,7 d,利用Alamar Blue法检测细胞增殖。
结果与结论:纯聚乳酸羟基乙酸支架具有相互交联贯通的微孔结构,微孔大小3-15 μm;5∶2聚乳酸羟基乙酸/珍珠粉或5∶2聚乳酸羟基乙酸/磷酸三钙支架具有较好的连续微孔结构,孔径大小为10-25 μm。随着珍珠粉或磷酸三钙含量的增加,复合支架的亲水性增加。加入珍珠粉或磷酸三钙能够提高复合支架的压缩力学性能,但随着含量增加,支架力学性能呈现先增强后减弱。珍珠粉或磷酸三钙的加入,改善了聚乳酸羟基乙酸的细胞亲和力,改善了支架的生物相容性,其中以5∶2聚乳酸羟基乙酸/珍珠粉复合支架生物相容性最好。


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

关键词: 生物材料, 骨生物材料, 聚乳酸羟基乙酸, 珍珠粉, 磷酸三钙, 低温层积制造, 国家自然科学基金

Abstract:

BACKGROUND: The study confirmed that adding tricalcium phosphate or pearl powder in polylactic-co-glycolic acid can complement the performance of both, which provides a good environment for cells and makes a faster and better growth of cells.
OBJECTIVE: We used polylactic-co-glycolic acid as matrix, composited with pearl powder or tricalcium phosphate to prepare scaffolds by low-temperature deposition manufacturing.
METHODS: Low-temperature deposition manufacturing was utilized to prepare composite scaffold of polylactic-co-glycolic acid/pearl powder or polylactic-co-glycolic acid/tricalcium phosphate at the ratio of 10:0, 5:2, 7:3 and 6:4. Microstructure, contact angle and compression modulus of elasticity of scaffolds were detected. MC3T3-E1 cells basically fused at 1×104/cm3 were seeded in the pure nonporous polylactic-co-glycolic acid scaffold, pure polylactic-co-glycolic acid scaffold with holes, polylactic-co-glycolic acid/pearl powder at 5:2 and polylactic-co-glycolic acid/tricalcium phosphate at 5:2 separately for 1 and 3 hours. Cell adhesion rate was detected using flow cytometry. After incubation for 1, 4 and 7 days, cell proliferation was measured using Alamar Blue method. 
RESULTS AND CONCLUSION: Pure polylactic-co-glycolic acid scaffold had cross-linked microporous structure, with pore size of 3-15 μm. Scaffolds of polylactic-co-glycolic acid/pearl powder at 5:2 or polylactic-co-glycolic acid/tricalcium phosphate at 5:2 had good continuous porous structure, with pore size of 10-25 μm. With increased content of pearl powder or tricalcium phosphate, the hydrophilicity of the composite scaffold increased. The addition of pearl powder or tricalcium phosphate could elevate compressive mechanical properties of the composite scaffold. With increased content, the mechanical property of the scaffold enhanced and then reduced. The addition of pearl powder or tricalcium phosphate improved the cellular affinity of polylactic-co-glycolic acid and the biocompatibility of the scaffold. The biocompatibility of polylactic-co-glycolic acid/pearl powder scaffold at 5:2 was the best.


中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程


全文链接:

Key words: Calcium Phosphates, Tissue Engineering, Biocompatible Materials

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