Heat-Modified Platelet-Rich Fibrin (H-PRF) Enhances Bone Regeneration Through Improved Structural Stability

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Oral and Maxillofacial Surgery

Background:

• Platelet-rich fibrin (PRF) is widely used in tissue regeneration due to its autologous nature and biological benefits.
• Conventional PRF has limited structural stability, impacting its efficacy in guided bone regeneration (GBR).
• Improving PRF's structural integrity is crucial for enhancing its space-maintaining capacity and osteogenic performance.

Purpose of the Study:

• To develop a novel heat-modified PRF (Heat-H-PRF) with improved structural stability and osteogenic potential.
• To evaluate the in vitro biocompatibility and osteogenic capacity of Heat-H-PRF.
• To assess the in vivo bone regeneration efficacy of Heat-H-PRF in a murine calvarial defect model.

Main Methods:

• Human PRF was thermally treated to create Heat-H-PRF.
• In vitro studies assessed cell adhesion, proliferation, alkaline phosphatase activity, matrix mineralization, and osteogenic marker expression using MC3T3-E1 cells.
• In vivo evaluation utilized a murine critical-size calvarial defect model with micro-CT, histology, and immunohistochemistry at 4 weeks.

Main Results:

• Heat-H-PRF exhibited excellent cytocompatibility and significantly enhanced osteoblast proliferation, differentiation, and mineralization in vitro compared to collagen membranes.
• In vivo, Heat-H-PRF promoted significantly greater new bone formation, increased bone surface area, and enhanced collagen deposition.
• Stronger expression of key osteogenic markers (Runx2, Osterix, osteocalcin, collagen 1) was observed with Heat-H-PRF.

Conclusions:

• Heat-modified PRF (Heat-H-PRF) is a simple, autologous biomaterial with superior handling properties and osteogenic potential.
• Heat-H-PRF demonstrates enhanced structural integrity, suggesting improved space-maintaining capabilities for GBR.
• Heat-H-PRF shows significant promise as an adjunctive scaffold for guided bone regeneration applications.