Selenite-Doped β‑TCP Powders with Improved Biological Properties: Microwave-Assisted Synthesis and Detailed...

Area of Science:

• Biomaterials Science
• Orthopedic Engineering
• Materials Chemistry

Background:

• Beta-tricalcium phosphate (β-TCP) is a key biomaterial in orthopedics for bone grafts and implant coatings.
• Enhancing β-TCP's properties through ion doping is crucial for improved clinical performance.
• Selenium (Se) is an essential trace element known to promote osteoblast activity and bone regeneration.

Purpose of the Study:

• To synthesize submicron-sized selenite (SeO3^2-)-doped β-TCP (Se-β-TCP) powders.
• To characterize the structural, physicochemical, and biological properties of the synthesized Se-β-TCP.
• To evaluate the potential of Se-β-TCP for orthopedic applications.

Main Methods:

• Microwave-assisted synthesis was employed for rapid and efficient ion incorporation.
• Structural characterization included X-ray diffraction and infrared spectroscopy.
• In vitro studies assessed preosteoblast proliferation and antibacterial activity against common pathogens.

Main Results:

• Successful synthesis of submicron-sized Se-β-TCP powders confirmed by structural analysis.
• Incorporation of SeO3^2- into the β-TCP lattice was evidenced by lattice parameter changes and IR spectra.
• Se-β-TCP demonstrated cytocompatibility with MC3T3-E1 preosteoblasts and inhibited the growth of Staphylococcus aureus, Staphylococcus epidermidis, and Escherichia coli.

Conclusions:

• Microwave-assisted synthesis is effective for producing Se-β-TCP with enhanced properties.
• Se-β-TCP exhibits promising cytocompatibility and significant antibacterial activity.
• The synthesized Se-β-TCP holds potential for advanced orthopedic applications.