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Year : 2020  |  Volume : 17  |  Issue : 2  |  Page : 120-125

A comparative study on the antimicrobial activity of irreversible hydrocolloid mixed with silver nanoparticles and chlorhexidine

1 Department of Prosthodontics, Dental School, Zanjan University of Medical Sciences, Zanjan, Iran
2 Pharmacutical Biotechnology Research Center, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran

Correspondence Address:
Dr. Mahdi Ataei
School of Dentistry, Zanjan University of Medical Sciences, Mahdavi Street, 4513956111 Zanjan
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1735-3327.280892

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Background: Impressions taken from patients have the potential of cross-transmission of infection among dentistry personnel. The present study aimed to compare the antimicrobial activity of chlorhexidine (CHX) and silver nanoparticles (AgNPs) combined with irreversible hydrocolloid. Materials and Methods: This experimental study examined the in vitro antimicrobial effects of irreversible hydrocolloid mixed with silver nanoparticles and chlorhexidine using four groups, namely CHX (0.2%) solution and mouthwash mixed with irreversible hydrocolloid Groups 1 and 2), AgNPs (0.1 and 0.2%) (Groups 3 and 4), and specimens mixed with distilled water as a control group (Group 5) on bacterial strains, namely, Staphylococcu saureu s,Enterococcu sfaecali s,Pseudomona saeruginos a,Escherichi acoli, andStaphylococcu sepidermidi s through disc diffusion method. There were three replications per bacterial species. As data were not normally distributed, Kruskal–Wallis test was used at a significance level of 0.05. Results: No antimicrobial activity was observed in the control groups. In S. aureus, CHX mouthwash had the highest antimicrobial activity, and AgNPs 0.1% and 0.2% groups had lower antimicrobial activity, and there was a significant difference between the two concentrations of AgNPs (P < 0.05). InE.faecali s, the effects of CHX compounds and AgNPs 0.2% were similar to each other and were higher than the effect of AgNPs 0.1% (P < 0.05). In E. coli, CHX compounds exhibited the highest efficacy relative to other materials (P < 0.05), and the AgNPs had no effect. In P. aeruginosa, AgNPs showed the highest growth inhibition zone, which had a significant difference compared to other materials (P ≤ 0.01), whereas the CHX compounds were not effective. InS.epidermidi s, the effect of CHX compounds was similar to one another and was higher than the effect of AgNPs (P ≤ 0.01). Conclusion: According to our observations, the antimicrobial activity of AgNPs at 0.1 and 0.2% against five tested bacterial strains was similar to those of pure CHX 0.2% solution and CHX 0.2% mouthwash.

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