Gelation of Uniform Interfacial Diffusant in Embedded 3D Printing

Area of Science:

• Biomaterials Science
• Tissue Engineering
• 3D Bioprinting

Background:

• Replicating complex perfusable biological structures remains a significant biofabrication challenge.
• Creating self-supporting, branched networks with varying channel diameters is particularly difficult.

Approach:

• Introduced the Gelation of Uniform Interfacial Diffusant in Embedded 3D Printing (GUIDE-3DP) technique.
• Leverages predictable diffusion of crosslinking initiators from sacrificial inks within a hydrogel precursor.
• Demonstrated adaptability with seven printable material systems and diverse crosslinking mechanisms.

Key Points:

• Achieves precise control over branching geometries and vessel sizes.
• Allows independent tuning of inner and outer channel diameters.
• Enables fabrication of seamless junctions at branch points.
• Successfully fabricated endothelial cell-lined vasculature-like networks.

Conclusions:

• GUIDE-3DP offers precise control over perfusable network fabrication.
• This 3D bioprinting platform is ideal for creating complex, lumenized structures.
• Represents a significant advancement for self-supporting, physiologically relevant engineered tissues.