Three-dimensional porous polycaprolactone/chitosan/bioactive glass scaffold for bone tissue engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Nanotechnology

Background:

• Bone tissue engineering requires advanced biomaterials for regenerating bone defects.
• Polycaprolactone (PCL), chitosan (CS), and bioactive glass (BG) nanoparticles offer potential synergistic properties for scaffold development.

Purpose of the Study:

• To fabricate and characterize three-dimensional (3D) porous scaffolds from PCL/CS/BG nanoparticle composites.
• To evaluate the physiochemical, mechanical, degradation, bioactivity, and biocompatibility properties of the developed scaffolds for bone regeneration.

Main Methods:

• Freeze-drying technique for scaffold fabrication.
• Physicochemical characterization using FTIR, XRD, EDX, and SEM.
• Evaluation of swelling, porosity, water retention, compression strength, in vitro biodegradation, bioactivity, and biocompatibility.

Main Results:

• Scaffolds with 4 wt.% BG content exhibited optimal pore size (106 μm), porosity (156%), swelling (128%), water retention (179%), and compressive strength (3.7 MPa).
• The PCL/CS/BG scaffolds demonstrated controlled degradation, good antimicrobial activity, and excellent biocompatibility with C3H10T1/2 cells.
• Alizarin red staining confirmed the osteogenic activity of the composite scaffolds.

Conclusions:

• The fabricated PCL/CS/BG composite scaffolds possess suitable properties for bone tissue engineering applications.
• These scaffolds show potential for promoting bone regeneration due to their mechanical integrity, bioactivity, and biocompatibility.