统一和多形态分级TPMS结构:设计策略,3D打印和机械性能
Raj Kumar1, Janakarajan Ramkumar2, Kantesh Balani3
1Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
Journal of the mechanical behavior of biomedical materials
|September 27, 2025
概括
三次周期性最小表面 (TPMS) 支架显示出对骨再生的前景. 结合TPMS结构的多形态分级设计为改善骨组织工程应用提供了增强的机械性能和表面积.
科学领域:
- 生物材料工程 生物材料工程
- 组织工程是组织工程.
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 骨再生需要模仿自然骨层次结构和机械性能的支架.
- 三重周期性最小表面 (TPMS) 提供了诸如光滑表面,高表面积和可调整的机械结构等优势,用于脚手架设计.
研究的目的:
- 使用立体石版3D打印设计和制造基于TPMS的支架.
- 研究统一和多形态分级 (MMG) TPMS晶格结构的机械性能和变形行为.
- 评估这些支架在骨再生应用中的潜力.
主要方法:
- 四种TPMS单元细胞类型 (IWP,Neovius,原始,F-RD) 用于架设计,孔度为70%.
- 通过将TPMS单元细胞与梯度过渡相结合,创建了多形态分级 (MMG) 格子结构.
- 脚手架是用聚乳酸制造的,使用立体石版3D打印.
- 进行了压缩试验,以评估机械性能,变形和能量吸收.
主要成果:
- 统一的IWP和F-RDTPMS网格显示了最高的表面积与体积 (SA/V) 比率 (7.44-10 mm2/mm3).
- IWP和Neovius均格子表现出优越的收益强度 (9-15 MPa) 和拉伸能量 (5.96-16.44 MJ/m3).
- 在MMG格子结构 (IWP/Neovius) 中,表现出更好的收益强度 (12-22 MPa) 和显著的SA/V (6-9 mm2/mm3).
- 变形机制从膨胀到剪切区域形成和用角裂粉碎而变化.
结论:
- 基于TPMS的支架,特别是MMG设计,提供可调节的机械性能和适合骨再生的高表面积.
- 立体石墨3D打印使得复杂TPMS架构的制造成为先进的生物材料应用的可能.
- 这些发现突出了工程TPMS支架的潜力,以应对骨组织工程中的挑战.
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