Quick-gelling inks allow high-resolution bioprinting

A new variation on an inkjet printer can create multi-component tissue scaffolds with features comparable in size to a single cell. Researchers in Germany modified a commercial bioprinter to output droplets of two different polymeric precursor materials simultaneously. When the droplets combine on a surface, rapid crosslinking reactions result in a hydrogel that retains its shape, making it able to form intricate 3D shapes. By altering the composition of the precursors, the mechanical and biological properties of the scaffolds can be made to vary in space, producing complex tissue-like structures that can be used as experimental models or for tissue regeneration (Biofabrication 10.1088/1758-5090/ab2aa1).

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