A 3D-printed PLA honeycomb-shaped scaffolds for bone tissue engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Orthopedic Research

Background:

• Polylactic acid (PLA) is a biocompatible and biodegradable polymer widely used in biomedical applications.
• Porous scaffolds are essential for bone graft substitutes in tissue engineering.
• 3D printing allows for the fabrication of complex scaffold architectures.

Purpose of the Study:

• To develop and characterize a 3D-printed polylactic acid (PLA) honeycomb-shaped porous scaffold for bone tissue engineering.
• To enhance the properties of the PLA scaffold through coating and mineralization treatments.
• To evaluate the mechanical strength, hydrophilicity, and biocompatibility of the modified scaffolds.

Main Methods:

• Fabrication of a honeycomb-shaped PLA scaffold using 3D printing.
• Application of coating and mineralization treatments to the PLA scaffold.
• Characterization using infrared spectroscopy (IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM).
• Evaluation of hydrophilicity via contact angle testing, mechanical strength via compression tests, and biocompatibility via MTT assay and cell behavior studies.

Main Results:

• The 3D-printed PLA scaffold exhibited a porosity of 82.6%.
• The scaffold demonstrated a compressive strength of 8.22 ± 0.16 MPa and a compressive modulus of 244.3 ± 5.7 MPa.
• Coating and mineralization treatments significantly improved scaffold hydrophilicity, strength, and biocompatibility.

Conclusions:

• The 3D-printed polylactic acid porous scaffold, particularly after coating and mineralization, shows excellent potential as an artificial scaffold for bone tissue engineering.
• The enhanced mechanical properties and biocompatibility make it a viable candidate for bone defect repair.
• Further research into its in vivo performance is warranted.