Assessment of a PCL-3D Printing-Dental Pulp Stem Cells Triplet for Bone Engineering: An In Vitro Study

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Bone engineering research focuses on optimizing stem cells, biomaterials, and scaffold manufacturing methods.
• Dental pulp stem cells (DPSCs) are a promising cell source for bone regeneration due to their differentiation potential.

Purpose of the Study:

• To evaluate the capacity of 3D printed polycaprolactone (PCL) scaffolds to support the attachment, proliferation, mineralization, and differentiation of DPSCs.
• To assess the suitability of a PCL-3D printing-DPSCs combination for bone engineering applications.

Main Methods:

• Polycaprolactone (PCL) scaffolds were fabricated using 3D printing with specific structural parameters (250 μm layer height, [0,0,0,90,90,90°] orientation).
• Swine DPSCs were isolated, cultured, and seeded onto the PCL scaffolds.
• Cell attachment, proliferation, viability (Live/Dead, Alamar Blue™), mineralization (von Kossa), and differentiation (Alizarin Red) were assessed.

Main Results:

• 3D printed PCL scaffolds exhibited defined pore sizes (axial: 938 ± 80 μm, lateral: 689 ± 13 μm) and strand diameter (290 ± 30 μm).
• DPSCs demonstrated successful attachment, proliferation, and viability on the PCL scaffolds.
• Mineralization and differentiation assays confirmed the osteogenic potential of DPSCs on the 3D printed scaffolds.

Conclusions:

• The combination of PCL, 3D printing, and DPSCs effectively supports cell growth and osteogenic differentiation.
• This material-processing technique-cell line combination shows significant potential for future bone engineering and preclinical studies.