Bioprinting has been applied to produce 3D cellular constructs for tissue engineering in recent years. Ｗe developed a novel 3D printing system to fabricate cell-laden hydrogels via a DLP-based projectorconstruct 3D structure hydrogels through a top-down printing method. The bioprinter is assembled from low-cost equipment including stepper motor, screw, LED-based DLP projector, open source com

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