Lightweight 3D bioprinting with point by point photocuring

Area of Science:

• Biotechnology
• Materials Science
• Tissue Engineering

Background:

• Methacryloyl-modified hydrogels are vital photocrosslinkable bioinks in tissue engineering.
• Existing 3D bioprinting methods for these hydrogels face limitations in printing quality, cost, and operational complexity.
• Bulky equipment hinders the widespread application of current hydrogel-based bioprinting techniques.

Purpose of the Study:

• To develop a lightweight, stereolithography-based 3D bioprinting system for methacryloyl-modified hydrogels.
• To address the limitations of existing bioprinting methods regarding cost, complexity, and printing quality.
• To enable precise printing of mixed cells with good biocompatibility.

Main Methods:

• Designed and constructed a compact, benchtop-accessible stereolithography 3D bioprinting system (300x300x200 mm).
• Utilized a mini bioink chamber for efficient material usage.
• Investigated a point-by-point curing process for accurate cell deposition and hydrogel crosslinking.

Main Results:

• The developed system is compact, low-cost, and features a smart mechanical and structural design.
• Demonstrated accurate printing of mixed cells within methacryloyl-modified hydrogels.
• Achieved excellent biocompatibility, crucial for viable tissue engineering constructs.

Conclusions:

• A novel, compact, and cost-effective stereolithography bioprinting system has been successfully developed.
• The system provides excellent biocompatibility for 3D bioprinting with methacryloyl-modified hydrogels.
• Potential applications include drug screening, pathological mechanism studies, and biological disease model construction.