Resumo

ONWUBU, SC; MOKGOBOLE, MU; MDLULI, PS  e  MOKHOTHU, TH. Assessing the antibacterial properties of eggshell-titanium powder. S. Afr. dent. j. [online]. 2022, vol.77, n.8, pp.483-488. ISSN 0375-1562.  http://dx.doi.org/10.17159/2519-0105/2022/v77no8a5.

INTRODUCTION: The global distribution of oral diseases caused by bacterial and the severity of their consequences constitute a pandemic condition. AIMS AND OBJECTIVES: The present paper reports on the antibacterial properties of a modified eggshell and titanium dioxide using the mechanochemical method. METHODS: EB@TiO₂ was modified and characterized using X-ray diffraction (XRD) while the degradation condition was studied using Thermogravimetric analysis (TGA). The inhibitory properties of EB@TiO₂ at different concentrations (2:1; 3:1 and 4: 1) against both Gram-positive (E. coli) and negative bacterial (B. Cereus) strain were studied the using disk diffusion method RESULTS AND CONCLUSIONS: The XRD result confirmed the presence of a thermodynamically stable calcite structure, which is indicative of calcium carbonate. The diffraction peak of the XRD at 2θ = 29.5^o suggests the deposition of TiO₂ on the surface of CaCo₃. TGA curves shows the decomposition of anatase form of titanium dioxide and calcium carbonate. The study evidently shows the antibacterial activities of EB@TiO₂ against Escherichia coli and B. Cereus. The salient feature of the study finding is that modifying eggshells with titanium dioxide improves the antibacterial properties, and thus offers a promising role for the development of potent dental materials in the management of oral diseases.

Palavras-chave : Antibacterial; eggshell; Mechanochemical; titanium dioxide.

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