Title:Evaluation of Cytotoxicity and Antimicrobial Activity of Experimental
Composites Containing Chitosan-Silver Oxide Particles Against Two Main
Pathogenic Bacteria in Periodontal Disease
Volume: 31
Issue: 2
Author(s): Nahid Nasrabadi, Navid Ramezanian, Parisa Ghorbanian, Ali Forouzanfar and Hamideh Sadat Mohammadipour*
Affiliation:
- Department of Cosmetic and Restorative Dentistry, Dental Materials Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Keywords:
Antimicrobial activity, chitosan, cytotoxicity, periodontitis, silver oxide, periodontal disease.
Abstract:
Introduction: Bacterial biofilm is known as the main cause of periodontal disease.
Generally, the anaerobic Gram-negative, such as Porphyromonas gingivalis and Fusobacterium
nucleatum, are considered the most identified bacteria.
Objective: This study aimed to investigate the antimicrobial effect and cytotoxicity of two
experimental composites containing chitosan-silver oxide (CH-Ag2O) particles.
Materials and methods: Four experimental groups, including Ag2O and CH, along with two
composites of CH-Ag2O 20 and CH-Ag2O 60 mg, were prepared. Antimicrobial activity was
performed against Porphyromonas gingivalis (ATCC#33277) and Fusobacterium nucleatum
(ATCC#25586) using the agar dilution method. Moreover, the cytotoxicity assay was performed on
human gingival fibroblasts (HGF) by the use of the MTT method. The obtained data were analyzed
with descriptive methods, one-way ANOVA, and Tukey’s LSD tests.
Results: The antibacterial activity of both composites was higher than both CH and Ag2O, and the
greatest antibacterial properties were presented in CH-Ag2O 60. In all three measurements (24, 48,
and 72 h), the greatest cytotoxicity was seen in Ag2O, followed by CH, CH-Ag2O 20, and CHAg2O
60 in descending order, respectively. The cytotoxicity of these components was related to the
concentration and not to the time of exposure. The results showed that Ag2O in 3.7 and 7.5 μg/ml
concentrations and CH-containing groups in 250 and 500 μg/ml were toxic to the cultured HGF.
Conclusion: The experimental composite containing CH-Ag2O 60 showed the greatest antibacterial
properties against two periodontal pathogens evaluated. In order to clarify the clinical significance
of composite cytotoxicity, further clinical studies are necessary.