用于骨修复的3D打印多 (l-乳酸) 支架,具有定向层次的微细胞泡结构和生物相容性
Cenyi Luo1, Juan Xue1, Qingyi Huang1
1School of Material Science and Engineering, Xihua University, Chengdu 610039, China.
Biomolecules
|August 28, 2025
概括
这项研究提出了一种连续的方法,用于制造具有面向毛孔的多 (乳酸) 支架,用于骨修复. 这种新技术增强了细胞活动,并满足了低负荷骨再生的机械要求.
科学领域:
- 生物材料科学
- 组织工程
- 复原医学
背景情况:
- 聚 (l-乳酸) (PLLA) 是一个有前途的可生物降解聚合物用于骨组织工程.
- 开发具有受控多孔结构的PLLA支架对于有效的骨修复至关重要.
- 现有的方法往往缺乏连续处理和对等级结构的精确控制.
研究的目的:
- 为具有定向等级微孔结构的PLLA支架制定持续准备策略.
- 研究和优化3D打印结构对脚手架微细胞形态的影响.
- 评估开发的骨架的生物相容性和机械性能.
主要方法:
- 使用融合沉积建模 (FDM) 3D打印与超临界二氧化碳 (SC-CO2) 微细胞泡技术集成.
- 采用一种新的挤出泡技术进行连续的支架制备.
- 研究了3D打印架构与微细胞结构形成之间的关系.
主要成果:
- 实现了面向多阶段微孔PLLA支架的连续挤出发泡过程.
- 脚手架的机械强度达到15.27MPa,适用于低负荷的骨修复.
- 证明细胞增殖 (100- 300%),分化和活性,以及调节的炎症因子表达.
结论:
- 集成的FDM和SC-CO2泡技术可以连续制造具有定向等级微细胞结构的PLLA支架.
- 开发的脚手架具有适合的机械性能和良好的生物相容性,可用于骨修复.
- 这一战略为设计和生产用于再生医学的先进PLLA支架提供了可行的方法.
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