Bioactive Glass/Polycaprolactone Hybrid with a Dual Cortical/Trabecular Structure for Bone Regeneration

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Orthopedic Engineering

Background:

• Organic-inorganic hybrid biomaterials offer combined bone bonding, osteogenic stimulation, and mechanical strength.
• Bioactive glass (BG)-polycaprolactone (PCL) hybrids leverage BG's osteoconductivity and PCL's toughness and degradation rate.

Purpose of the Study:

• To synthesize and evaluate BG-PCL hybrid scaffolds with a dual cortical/trabecular structure.
• To assess the in vitro and in vivo biological potential of BG-PCL scaffolds for bone regeneration.

Main Methods:

• Synthesis of BG-PCL hybrid scaffolds mimicking bone architecture.
• In vitro evaluation using rat primary osteoblasts (RPO) for cell adhesion and differentiation.
• In vivo assessment in a mice critical-size calvarial defect model, compared to bovine bone xenograft (BTB).

Main Results:

• BG-PCL scaffolds enhanced RPO adhesion and differentiation compared to BTB.
• In vivo studies showed increased bone ingrowth with BG-PCL scaffolds.
• Histological analysis confirmed scaffold vascularization, advanced bone regeneration, and remodeling.

Conclusions:

• BG-PCL hybrid scaffolds demonstrate significant potential for bone regeneration.
• These scaffolds facilitate osteoblast activity, promote bone ingrowth, and undergo complete conversion into bone-like mineral in vivo.