Computer-assisted designing and biofabrication of 3-D hydrogel structures towards thick 3-D tissue engineering


Engineering and manufacturing of thick and bio-functional tissue products is one of the big issues in tissue engineering. To produce such tissues, we need some innovative technologies, which enable us to build up thick, three-dimensional structures and to arrange multiple types of cells to make complicated tissue structures. Based on such considerations, we have developed a custom-made inkjet 3D bioprinter, which realized both of direct cell printing and 3D laminating printing with cells and hydrogel. Recently, it has been improved, and here we report recent progresses and our achievements with new version 3D bioprinter.

Image based printing mode and active Z-axis control system were added. As a useful structure, an image of multi-honeycomb pattern was designed in computer and next it was copied and finally in total 100 image data were prepared. Using those digital data, 3D image of thick multi-honeycomb structure was reconstructed in computer, and then, laminating printing was carried out using our new version 3D bioprinter with alginate hydrogel. The new version printer showed good performance of 3D laminating printing and finally complicated 3D multi-honeycomb hydrogel structures could be successfully fabricated. It is indicated that fabrication of cell containing 3D structures based on the computer aided designs is feasible and that such biofabrication technologies must contribute to further innovative advancement of tissue engineering.

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Our recent works were supported by grants-in-aid for Scientific Research (No.22300152) from the Japan Society for the Promotion of Science (JSPS) and a grant project by Toyama new industrial organization. We would like to thank all the members of the Bioprinting Project of KAST and the students in the Nakamura Laboratory of the University of Toyama.

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Correspondence to Makoto Nakamura.

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Nakamura, M., Arai, K., Toda, H. et al. Computer-assisted designing and biofabrication of 3-D hydrogel structures towards thick 3-D tissue engineering. MRS Online Proceedings Library 1415, 127–132 (2012).

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