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Finland-based bioprinting agency Brinter has teamed up with Tampere College’s Kellomäki Lab Biomaterials and Tissue Engineering Group to find new bioinks for 3D printing and advance progress inside the bioprinting area.
The primary breakthrough for the companions is the event of a brand new technique for making a photocrosslinkable bioink from gellan gum, a precursor confirmed to own good rheological properties for hydrogels.
In line with the staff, their two-step crosslinking method is an efficient strategy to turning unprintable gellan gum inks into possible bioinks for the fabrication of 3D printed constructions, and is also utilized to the formation of different bioinks.
Brinter’s 3D bioprinting actions
Brinter was based in 2020 as a spin-out from 3D printing service bureau 3DTech Ltd, and makes a speciality of creating 3D bioprinters, modules, and inks for purchasers within the biotech, pharmaceutical, analysis, and beauty industries. Thus far, the agency’s purchasers embrace the likes of Nanoform, Johannes Gutenberg College of Mainz, the College of Oulu, and Tampere College, the latter with whom Brinter is engaged on the event of recent bioinks.
In June final 12 months, the agency acquired €1.2 million in seed funding to increase its operations and take its bioprinting providing to the US and European medical markets.
The corporate’s flagship bioprinter is the Brinter One, a transportable multi-material machine able to printing each stiff and tender supplies. In November, the agency launched its entry-level mannequin, the Brinter Core, developed with the purpose of creating bioprinting extra accessible. The printer is half the scale and price of its predecessor to allow extra pharmaceutical companies, hospitals, universities, and analysis facilities to entry its 3D bioprinting applied sciences.
Most lately, Brinter partnered with extrusion know-how developer Puredyne to develop and launch its new Visco Bio printhead to be used with its bioprinters. The modular printhead is designed to extrude extra exact and fixed quantity per revolution, which means its clients can decrease their pricey medical-grade materials waste.
Growing photocrosslinkable bioinks
A scarcity of appropriate bioinks has been recognized as one of many main bottlenecks presently limiting progress inside the area of bioprinting. The Brinter and Tampere College staff sought to widen the scope of printable biomaterials with their newest examine, which focuses on methacrylated gellan gum (GGMA).
Confirmed to exhibit good rheological properties, gellan gum is a precursor used as a thickening agent in meals and beauty merchandise, and in industrial settings. Nonetheless, GGMA precursors alone are unable to keep up a secure filament form after extrusion.
To beat this and make GGMA appropriate for printing, the staff developed a brand new two-step photocrosslinking method that made use of a Ca2+ ionic crosslinker. Within the presence of the crosslinker, the GGMA precursor remodeled from a liquid to a weak extrudable hydrogel. The staff then used their photocrosslinking technique to show the weak hydrogel right into a hydrogel with good condition constancy.
The optimized GGMA ink was 3D printed with constant fibers and demonstrated excessive printability. The ensuing 3D printed constructions, whereas nonetheless missing excessive decision in comparison with the management constructions used within the examine, demonstrated excessive accuracy, form constancy, structural integrity, and mechanical stability.
In line with the staff, the examine proved their two-step crosslinking method as an efficient strategy to show GGMA inks into 3D printable bioinks which might have a variety of potential bioprinting functions.
Additional info on the examine might be discovered within the paper titled: “Two-step crosslinking to boost the printability of methacrylated gellan gum biomaterial ink for extrusion-based 3D bioprinting,” revealed within the Bioprinting journal. The examine is co-authored by H. Jongprasitkul, S. Turunen, V. Parihar, and M. Kellomaki.
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Featured picture exhibits side-views and top-views of printed cylinders for the analysis of printing accuracy and structural integrity. Picture through Biomaterials.
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