Biogenic MnO₂ nanoparticles for antibacterial dental application

This study explores the biological synthesis and antibacterial activity of manganese dioxide (MnO₂) nanoparticles for potential use in dental infection diagnostics and control. MnO₂ nanoparticles were synthesized using an eco-friendly biogenic method based on leek ( Allium ampeloprasum) leaf extract, serving as a natural reducing and stabilizing agent. Structural and morphological characterization confirmed the rhombohedral crystalline phase and compact nanostructure of the particles through X-ray diffraction and field-emission scanning electron microscopy analyses. Bacterial isolates from dental patients were identified and tested for susceptibility to MnO₂ nanoparticles. The nanoparticles exhibited strong antibacterial effects, with higher concentrations resulting in a significant increase in bacterial cell death. These findings highlight the biological potential of green-synthesized MnO₂ nanoparticles as sustainable bio- nanomaterials for diagnostic and antimicrobial applications in oral health management.