High-Fidelity Printing Strategies for Printing 3D Vascular Hydrogel Structures
Abstract:Vascularization arguably poses the most significant hurdle for the success of most biomaterials-based tissue engineering therapies. In this work, we report two printing strategies that permit the 3D Inkjet printing of fluorescent alginate hydrogels into overhanging structures and closed lumens that could serve as vessel mimetics. The first is 4-Matrix printing, where the order of droplet printing in each printing layer is optimized so that new droplets do not coalesce with un-gelled droplets on the surface. The second is the use of incremental droplet spacing to print overhanging and closed structures in order to reduce the degree of down-wall flow.
Printed 3D structures were examined by 3D confocal microscopy in order to determine the effectiveness of these printing strategies. The results are promising and might be applied to other rapidly gelling hydrogel systems.
Document Type: Research Article
Publication date: 2009-01-01
For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.
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