3D-printed polycaprolactone scaffolds coated with beta tricalcium phosphate for bone regeneration

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• 3D-printing is a key technology in bone tissue engineering (BTE).
• Polycaprolactone (PCL) and beta-tricalcium phosphate (β-TCP) are commonly used biomaterials.
• Investigating scaffold-cell interactions is crucial for BTE applications.

Purpose of the Study:

• To evaluate the biocompatibility and osteogenic potential of 3D-printed PCL and PCL/β-TCP composite scaffolds.
• To assess the interaction of MG-63 osteosarcoma cells with these scaffolds.
• To compare the efficacy of PCL versus PCL/β-TCP scaffolds in promoting bone cell growth and differentiation.

Main Methods:

• Fused Deposition Modeling (FDM) 3D printing technique used for scaffold fabrication.
• Scanning Electron Microscopy (SEM) for structural and coating analysis.
• MTT assay for cell viability (biocompatibility) and Alkaline Phosphatase (ALP) activity assay for osteogenic differentiation.

Main Results:

• Both PCL and PCL/β-TCP scaffolds exhibited non-toxic effects on MG-63 cells.
• PCL/β-TCP scaffolds showed significantly higher ALP activity and mineralization compared to PCL scaffolds.
• Mineralization was observed to be time-dependent, with enhanced results on PCL/β-TCP scaffolds.

Conclusions:

• 3D-printed PCL and PCL/β-TCP scaffolds effectively support MG-63 cell proliferation.
• PCL/β-TCP composite scaffolds are superior to PCL scaffolds for enhancing MG-63 cell differentiation and mineralization.
• These findings highlight the potential of PCL/β-TCP scaffolds in bone tissue engineering.