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3D bioprinting of complex biological structures with tunable elastic modulus and porosity using freeform reversible embedding of suspended hydrogels

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生物设计与制造(英文) 2023年第5期6卷 550-562页

作者： Zhuang Chen Chuanzhen Huang Hanlian Liu Xu Han Zhichao Wang Shuying Li Jun Huang Zhen Wang Centre for Advanced Jet Engineering Technology(CaJET) Key Laboratory of High-Efficiency and Clean Mechanical Manufacture(Ministry of Education)National Experimental Teaching Demonstration Center for Mechanical Engineering(Shandong University)School of Mechanical EngineeringShandong UniversityJinan 250061China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China

Three-dimensional(3D)bioprinting has been used widely for the construction of hard tissues such as bone and ***,constructing soft tissues with complex structures remains a *** this study,complex structures characterized by both tunable elastic modulus and porosity were printed using freeform reversible embedding of suspended hydrogels(FRESHs)printing methods.A mixture of alginate and gelatin was used as the main functional component of the *** analysis showed that this bioink possesses shear thinning and shear recovery properties,supporting both cryogenic and FRESH printing *** printing capabilities and limitations of cryogenic and FRESH printing were then analyzed by printability tests.A series of complex structures were printed by FRESH printing methods which could not be realized using conventional *** tests and scanning electron microscopy analysis showed that the printed structure is of excellent flexibility and could be applied in various conditions by adjusting its mechanical modulus and porosity.L929 fibroblast cells maintained cell viability in cell-laden-printed structures,and the addition of collagen further improved the hydrogels’***,all results provided useful insight into the building of human soft tissue organ blocks.

关键词： Bioink Freeform reversible embedding of suspended hydrogels(FRESHs)printing 3D extrusion cell-laden printing Tissue engineering tunable elastic modulus and porosity

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