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  3. Vol. 11 No. 4 (2016): Fall 2016
  4. Original Article

Vol. 11 No. 4 (2016)

September 2016

Antibacterial Efficacy of Different Concentrations of Sodium Hypochlorite Gel and Solution on Enterococcus faecalis Biofilm

  • Vahid Zand
  • Mehrdad Lotfi
  • Mohammad Hosein Soroush
  • Amir Ardalan Abdollahi
  • Mehdi Sadeghi
  • Ali Mojaddadi

Iranian Endodontic Journal, Vol. 11 No. 4 (2016), 28 September 2016 , Page 315-319
https://doi.org/10.22037/iej.v11i4.11881 Published: 2016-09-01

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Abstract

Introduction: This in vitro study compared the antibacterial efficacy of 2.5% sodium hypochlorite gel and 2.5% and 5.25% sodium hypochlorite solutions on Enterococcus faecalis (E. faecalis) biofilm. Methods and Materials: The root canals of 60 extracted human single-rooted teeth were contaminated with E. faecalis and incubated for 6 weeks. The samples were randomly assigned to three experimental groups and one control group (n=15). The study protocol in the experimental groups consisted of injection of 5 mL of each irrigant into the root canals. Samples were collected from the root canal walls and 1:10 serial dilutions were prepared and added to Muller Hinton Agar (MHA) plates and incubated at 37°C for 48 h. A classic colony counting technique was used for determining vital E. faecalis bacterial counts in MHA plates. The Kruskal-Wallis test was used for statistical analysis of the data. The level of significance was set at 0.05. Results: The antibacterial effect of the irrigants in all three experimental groups was significantly greater than the control group (P<0.05), with no significant difference between 2.5% and 5.25% NaOCl solutions (P>0.05). The effect of 2.5% and 5.25% NaOCl solutions were significantly superior to 2.5% NaOCl gel (P<0.05). Conclusion: Under the limitations of this study, 2.5% NaOCl gel was effective in reducing E. faecalis counts; however this effect was less than that of NaOCl solutions.

Keywords: Antibacterial; Biofilm; Enterococcus Faecalis; Sodium Hypochlorite

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1.
Zand V, Lotfi M, Soroush MH, Abdollahi AA, Sadeghi M, Mojaddadi A. Antibacterial Efficacy of Different Concentrations of Sodium Hypochlorite Gel and Solution on Enterococcus faecalis Biofilm. Iran Endod J [Internet]. 2016 Sep. 1 [cited 2025 Jun. 12];11(4):315-9. Available from: https://journals.sbmu.ac.ir/iej/article/view/11881
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