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通过快速成型技术制备用于骨组织再生的新型三维支架。

Production of new 3D scaffolds for bone tissue regeneration by rapid prototyping.

作者信息

Fradique R, Correia T R, Miguel S P, de Sá K D, Figueira D R, Mendonça A G, Correia I J

机构信息

CICS-UBI-Health Sciences Research Centre, University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal.

Department of Chemistry, University of Beira Interior, R. Marquês d'Ávila e Bolama, 6201-001, Covilhã, Portugal.

出版信息

J Mater Sci Mater Med. 2016 Apr;27(4):69. doi: 10.1007/s10856-016-5681-x. Epub 2016 Feb 17.

Abstract

The incidence of bone disorders, whether due to trauma or pathology, has been trending upward with the aging of the worldwide population. The currently available treatments for bone injuries are rather limited, involving mainly bone grafts and implants. A particularly promising approach for bone regeneration uses rapid prototyping (RP) technologies to produce 3D scaffolds with highly controlled structure and orientation, based on computer-aided design models or medical data. Herein, tricalcium phosphate (TCP)/alginate scaffolds were produced using RP and subsequently their physicochemical, mechanical and biological properties were characterized. The results showed that 60/40 of TCP and alginate formulation was able to match the compression and present a similar Young modulus to that of trabecular bone while presenting an adequate biocompatibility. Moreover, the biomineralization ability, roughness and macro and microporosity of scaffolds allowed cell anchoring and proliferation at their surface, as well as cell migration to its interior, processes that are fundamental for osteointegration and bone regeneration.

摘要

无论是由于创伤还是病理原因导致的骨疾病发病率,都随着全球人口老龄化呈上升趋势。目前可用的骨损伤治疗方法相当有限,主要包括骨移植和植入物。一种特别有前景的骨再生方法是使用快速成型(RP)技术,基于计算机辅助设计模型或医学数据来生产具有高度可控结构和取向的三维支架。在此,使用RP制备了磷酸三钙(TCP)/藻酸盐支架,随后对其物理化学、力学和生物学性能进行了表征。结果表明,TCP与藻酸盐比例为60/40的配方能够匹配压缩性能,并呈现出与松质骨相似的杨氏模量,同时具有足够的生物相容性。此外,支架的生物矿化能力、粗糙度以及宏观和微观孔隙率允许细胞在其表面锚定和增殖,以及细胞向其内部迁移,这些过程对于骨整合和骨再生至关重要。

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