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Effect of Silver Nanoparticles Green Synthesized by Using the Quercus Infectoria Extract on Some Dental Pathogens Publisher



Nazemi Salman B1 ; Aliyari N2 ; Yazdinezhad A3 ; Mohammadi Qeydari M4 ; Taheri SS5
Authors
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Authors Affiliations
  1. 1. Pediatric Dentistry, Dental School, Zanjan University of Medical Sciences, Zanjan, Iran
  2. 2. Department of Oral Medicine, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Pharmaceutical Biotechnology, School of Pharmacy, Zanjan University of Medical Sciences, Zanjan, Iran
  4. 4. Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran
  5. 5. Department of Biostatistics and Epidemiology, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran

Source: Journal of Research in Dental and Maxillofacial Sciences Published:2025


Abstract

Background and Aim: Green synthesis through using plants such as Quercus infectoria (Q. infectoria) is a relatively novel technique for synthesis of nanoparticles. This study aimed to assess the effect of silver nanoparticles (SNPs) green synthesized by using the Q. infectoria extract on some dental pathogens. Materials and Methods: In this in vitro study, SNPs were synthesized by using the Q. infectoria extract and silver nitrate. Formation of SNPs was confirmed by UV-visible spectrophotometry. Presence/absence and proliferation of Streptococcus mutans (S. mutans), Streptococcus salivarius (S. salivarius), Streptococcus sobrinus (S. sobrinus), Lactobacillus acidophilus (L. acidophilus), and Enterococcus faecalis (E. faecalis) were evaluated by observing the tube turbidity following their culture in presence of SNPs. Also, different concentrations of Q. infectoria extract (1, ½, ¼, 1/8, and 1/16) were added to 5 bacterial plates, and the diameter of the growth inhibition zones was measured by a ruler. The results were reported descriptively. Results: The minimum inhibitory concentration (MIC) of SNPs against L. acidophilus was lower than that for other pathogens. The highest antibacterial effect was observed in concentration of 1 against L. acidophilus, and ½ on S. salivarius and L. acidophilus. Also, L. acidophilus was the most sensitive and E. faecalis was the least sensitive microorganism to ¼, 1/8, and 1/16 concentrations. The 1/16 concentration caused no growth inhibition zone in E. faecalis plate. Conclusion: Green synthesized SNPs had acceptable antibacterial activity against the tested microorganisms, and may be used as an antibacterial agent against these pathogens. © 2025 Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University.
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