COMPOSITE POLYMER-COATED MINERAL SCAFFOLDS FOR BONE REGENERATION: FROM MATERIAL CHARACTERIZATION TO HUMAN STUDIES

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Orthopedic Research

Background:

• Bovine bone xenografts are promising for bone regeneration but require enhanced properties.
• Hydrogels and synthetic polymers can improve scaffold performance.
• Surface modification can enhance cell interaction and osteogenesis.

Purpose of the Study:

• To enhance bovine bone xenografts (hydroxyapatite) with poly(L-lactide-co-ε-caprolactone) (PLCL) and RGD-collagen.
• To evaluate the impact of these modifications on mechanical properties, hydrophilicity, cell adhesion, and osteogenicity.
• To assess the in vitro and in vivo efficacy of the modified scaffolds for bone regeneration.

Main Methods:

• Scaffold fabrication: Hydroxyapatite coated with PLCL and RGD-collagen.
• In vitro characterization: Environmental Scanning Electronic Microscopy (ESEM), micro tomography, compression tests.
• Cell studies: SAOS-2 and MG-63 cell lines for attachment and growth.
• In vivo evaluation: ISO biocompatibility studies in animals and human bone regeneration trials.

Main Results:

• Microstructural analysis confirmed scaffold integrity.
• Enhanced mechanical properties and hydrophilicity were observed.
• Successful cell attachment and proliferation within the scaffold.
• Positive in vivo biocompatibility and significant bone regeneration in human trials.

Conclusions:

• The modified bovine bone xenograft scaffolds exhibit improved biological and mechanical characteristics.
• These scaffolds effectively promote bone regeneration with favorable clinical outcomes.
• The combination of PLCL and RGD-collagen presents a promising approach for orthopedic applications.