A novel bioactive three-dimensional beta-tricalcium phosphate/chitosan scaffold for periodontal tissue engineering

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Periodontology

Background:

• Periodontal tissue engineering requires advanced scaffolds to promote cell growth and differentiation.
• Current limitations in scaffold development hinder effective periodontal regeneration.

Purpose of the Study:

• To develop and evaluate porous beta-tricalcium phosphate/chitosan composite scaffolds for periodontal tissue regeneration.
• To assess the biocompatibility and osteogenic/cementogenic potential of these scaffolds.

Main Methods:

• Fabrication of composite scaffolds using a freeze-drying method.
• Evaluation of scaffold microstructure, porosity, and cytocompatibility.
• Analysis of human periodontal ligament cell (HPLC) gene expression (BSP, CAP) and protein expression (ALP, OPN) in vitro and in vivo.

Main Results:

• Composite scaffolds exhibited a homogeneous 3D microstructure with suitable pore size and high porosity (91.07%).
• Enhanced HPLC proliferation and significantly upregulated gene expression of bone sialoprotein (BSP) and cementum attachment protein (CAP).
• In vivo studies showed HPLC proliferation, vascular ingrowth, and upregulated protein expression of alkaline phosphatase (ALP) and osteopontin (OPN).

Conclusions:

• Beta-tricalcium phosphate/chitosan composite scaffolds effectively support HPLC proliferation and differentiation.
• These scaffolds show potential for promoting osteoblast and cementoblast phenotypes, crucial for periodontal regeneration.