Three-dimensional macroscopic scaffolds with a gradient in stiffness for functional regeneration of interfacial tissues.

Three-dimensional macroscopic scaffolds with a gradient in stiffness for functional regeneration of interfacial tissues.
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DOI:
10.1002/jbm.a.32765
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发表时间:
2010-09-01
影响因子:
4.9
通讯作者:
Detamore, Michael S.
Detamore, Michael S.
中科院分区:
工程技术3区
文献类型:
--
作者:
Singh, Milind;Dormer, Nathan;Salash, Jean R.;Christian, Jordan M.;Moore, David S.;Berkland, Cory;Detamore, Michael S.

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已经证明了一种新的方法来构建生物相容性的大孔3-D组织工程支架,该支架在组成上包含连续的宏观梯度,该梯度产生沿支架轴沿着的刚度梯度。聚合物微球,由聚(d,l-乳酸-共-乙醇酸)(PLGA),和复合微球封装更高的刚度的纳米相材料(PLGA封装碳酸钙或二氧化钛纳米粒子)用于构建微球为基础的支架。通过控制聚合物微球和复合微球的灌注,通过乙醇烧结技术制备了显示CaCO 3/TiO 2的各向异性宏观分布的梯度支架。可控的机械特性和生物相容性的性质,这些支架值得进一步调查的界面组织工程应用。
A novel approach has been demonstrated to construct biocompatible, macroporous 3-D tissue engineering scaffolds containing a continuous macroscopic gradient in composition that yields a stiffness gradient along the axis of the scaffold. Polymeric microspheres, made of poly(d,l-lactic-co-glycolic acid) (PLGA), and composite microspheres encapsulating a higher stiffness nano-phase material (PLGA encapsulating CaCO3 or TiO2 nanoparticles) were used for the construction of microsphere-based scaffolds. Using controlled infusion of polymeric and composite microspheres, gradient scaffolds displaying an anisotropic macroscopic distribution of CaCO3/TiO2 were fabricated via an ethanol sintering technique. The controllable mechanical characteristics and biocompatible nature of these scaffolds warrants further investigation for interfacial tissue engineering applications.
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发表时间: 2006-12-01
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