As a first big step, researchers at the Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB) in Stuttgart recently announced that they’ve created a bio-ink suitable for printing a number of tissue types.
The key to the new ink’s versatility is its gelatin base. Gelatin, a derivative of collagen, is one of the main constituents of human tissues. While gelatin is normally in a gelatinous state at room temperature, the IGB researchers have created a way to keep the material in a liquid form. This makes it easier for the 3D printer to manipulate the material, depositing it onto a sterile sheet where it can then be cured with a UV light and rendered solid.
According to the IGB, “researchers can control the chemical modification of the biological molecules so that the resulting gels have differing strengths and swelling characteristics. The properties of natural tissue can therefore be imitated – from solid cartilage to soft adipose tissue.”
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