Magnesium Modified β-Tricalcium Phosphate Induces Cell Osteogenic Differentiation In Vitro and Bone Regeneration In...

Area of Science:

• Biomaterials Science
• Orthopedic Research
• Regenerative Medicine

Background:

• Beta-tricalcium phosphate (β-TCP) is a well-established material for bone regeneration.
• Optimizing β-TCP's physicochemical and biological properties is crucial for enhancing bone grafting and tissue engineering applications.

Purpose of the Study:

• To improve β-TCP properties by hydrothermally adding magnesium (Mg).
• To evaluate the biocompatibility and bone regenerative capacity of the resulting β-TCP/Mg composite for bone grafting and tissue engineering.

Main Methods:

• In vitro studies assessed cell viability (WST-1 assay) and osteogenic differentiation (alkaline phosphatase activity, bone sialoprotein upregulation).
• In vivo studies utilized rabbit calvaria critical defect models, analyzed using Micro-CT and histomorphometry.
• Physicochemical characterization included SEM analysis.

Main Results:

• Magnesium addition enhanced alkaline phosphatase activity and cell proliferation.
• SEM confirmed Mg addition did not alter β-TCP surface roughness.
• β-TCP/Mg significantly increased new bone formation compared to controls in vivo.

Conclusions:

• Hydrothermal MgO addition to β-TCP improves biocompatibility and osteogenic potential.
• β-TCP/Mg demonstrates enhanced osteoconduction and osteoblastic differentiation, promoting superior bone regeneration.
• This modified biomaterial holds significant potential for bone grafting and tissue engineering applications.