3D construct of hydroxyapatite/zinc oxide/palladium nanocomposite scaffold for bone tissue engineering

Area of Science:

• Biomaterials Science
• Nanotechnology
• Materials Engineering

Background:

• Hydroxyapatite (HA) is a key material in bone regeneration.
• Developing advanced HA-based nanocomposites is crucial for improving mechanical and biological properties.
• Incorporating Zinc Oxide (ZnO) and Palladium (Pd) offers potential for enhanced functionality.

Purpose of the Study:

• To synthesize and characterize Hydroxyapatite/Zinc Oxide/Palladium (HA/ZnO/Pd) nanocomposite scaffolds.
• To evaluate the mechanical properties, biocompatibility, bioactivity, and antibacterial efficacy of these nanocomposites.
• To compare the performance of nanocomposite scaffolds with pure HA scaffolds.

Main Methods:

• Sol-gel and precipitation methods were used for material synthesis.
• Characterization involved techniques such as SEM, TEM, AFM, EDS, and BET analysis.
• Bioactivity was assessed via simulated body fluid (SBF) immersion, and biocompatibility using dental pulp stem cells (DPSCs).

Main Results:

• HA/ZnO/Pd scaffolds (H1, H2, H3) exhibited superior compressive strength and toughness compared to pure HA (H0).
• Apatite deposition was observed on scaffold surfaces after SBF immersion, indicating bioactivity.
• Nanocomposite scaffolds showed reduced cell proliferation but significant in vitro antibacterial activity against microorganisms.

Conclusions:

• The developed HA/ZnO/Pd nanocomposite scaffolds demonstrate promising mechanical and antibacterial properties for potential biomedical applications.
• Chitosan coating influenced the properties of the nanocomposite scaffolds.
• Further research is needed to optimize biocompatibility for enhanced cell interaction.