Influence of scaffold design on 3D printed cell constructs

Area of Science:

• Biomaterial Science
• Tissue Engineering
• Additive Manufacturing

Background:

• 3D printing offers a novel platform for scaffold design and fabrication in tissue engineering.
• Low-cost desktop 3D printing technologies are emerging as rapid manufacturing routes for various scaffold designs.
• Previous studies have shown promising results for 3D printed scaffolds supporting cellular life.

Purpose of the Study:

• To determine the optimal scaffold architecture for three-dimensional cell growth using low-cost 3D printing.
• To assess the influence of pullulan and hyaluronic acid coatings on cell proliferation and metabolic rate.
• To investigate the inter-relationships between the printing process, scaffold design, and scaffold properties.

Main Methods:

• Six scaffold designs were manufactured using fused deposition modeling (FDM) with polylactic acid (PLA).
• Scaffolds were coated with pullulan and hyaluronic acid.
• Characterization included water uptake analysis, mechanical testing, and morphological evaluation.

Main Results:

• Key differences were observed in porosity, diffusivity, swellability, and compressive strength among the scaffold designs.
• An optimal design was selected based on physical measurements weighted using a design matrix technique.
• Coating influence on cell proliferation and metabolic rate was assessed.

Conclusions:

• Fused deposition modeling is a viable low-cost method for fabricating diverse 3D scaffold architectures.
• Scaffold design significantly impacts physical properties crucial for cell growth.
• Further research can optimize scaffold design and coatings for enhanced tissue engineering applications.