Methods for biomaterials printing: A short review and perspective.

Area of Science:

• Biomaterials Engineering
• Additive Manufacturing
• Biomedical Applications

Background:

• Printing technologies offer innovative fabrication of complex biomaterial shapes.
• Challenges exist in adjusting functionality due to material and parameter diversity.
• 3D printing (additive manufacturing) converts digital designs into biomedical objects like implants and scaffolds.

Purpose of the Study:

• To explore the evolution of printing technologies in biomaterials engineering.
• To highlight the capabilities of 4D printing (shape-morphing fabrication) and 5D printing.
• To discuss essential bio-ink characteristics for biomedical uses.

Main Methods:

• Review of 3D, 4D, and 5D printing technologies.
• Discussion of shape-morphing fabrication principles.
• Analysis of bio-ink properties: cell viability, scaffold biomimicry, biodegradation, and affordability.

Main Results:

• 3D printing enables digital-to-physical conversion for biomedical devices.
• 4D printing introduces stimulus-responsive, programmable shape-morphing capabilities.
• 5D printing allows multi-axis printing, reducing material usage and enabling curved surfaces.

Conclusions:

• Printing technologies are revolutionizing biomaterials engineering.
• Future bioprinting requires bio-inks with optimized characteristics for advanced applications.
• Continued innovation in printing methods promises enhanced biomedical solutions.