Journal List > J Korean Acad Conserv Dent > v.34(6) > 1056387

Kim, Kang, Choi, Yang, Yang, Kang, Hwang, Hwang, and Oh: Comparison of Antibacterial effect of Listerine® with Various root canal irrigants

Abstract

The purpose of this study is to compare the antibacterial effect of Listerine® on two microorganisms (P. gingivalis and E. faecalis) with various root canal irrigants (NaOCl, CHX, EDTA) and to identify possibility of using Listerine® as a root canal irrigant. Porphyromonas gingivalis ATCC 3327 and Enterococcus faecalis ATCC 29212 were used in this experiment. For the test irrigants, 0.5%, 1%, 2.5%, 5.25% NaOCl, 0.1%, 0.2%, 1%, 2% CHX, 0.5M EDTA (18.6% EDTA) and Listerine® were prepared. Distiled water was used as control. Two methods-1) Comparison of turbidity in broth and 2) Agar diffusion test-were used to determine the extent of antibacterial effect of Listerine® and to compare it with that of NaOCl, CHX, and EDTA. All solutions tested were effective against two bacterial strains compared with control (p<0.001). Any concentration of NaOCl, CHX, and EDTA showed similarly high effectiveness against all bacterial strains. In all experiment, Listerine® showed significantly low antibacterial effect compared with the other root canal irrigants (p<0.05).
In conclusion, the results reflect remarkably low antibacterial effect of Listerine® as compared with root canal irrigants in general so it is not suitable for the root canal irrigant.

Figures and Tables

Figure 1
Comparison of bacterial turbidity in broth at 630nm wave length after 48hours culture.
A. Turbidity of E. faecalis at 630 nm
B. Turbidity of P. gingivalis at 630 nm
-C0.1: 0.1% CHX, C0.2: 0.2% CHX, C1: 1% CHX, C2: 2% CHX, N0.5: 0.5% NaOCl, N1: 1% NaOCl, N2.5: 2.5% NaOCl, N5.25: 5.25% NaOCl, DW: Distilled water(Control)
**: Statistical significance (p<0.001)
*: Statistical significance (p<0.05)
jkacd-34-500-g001
Figure 2
Comparison of agar diffusion test after 48hours culture (Averages of zones of inhibition)(mm).
A. Diameter of inhibition zone of E. faecalis
B. Diameter of inhibition zone of P. gingivalis
-C0.1: 0.1% CHX, C0.2: 0.2% CHX, C1: 1% CHX, C2: 2% CHX, N0.5: 0.5% NaOCl, N1: 1% NaOCl, N2.5: 2.5% NaOCl, N5.25: 5.25% NaOCl, DW: Distilled water(Control)
**: Statistical significance (p<0.001)
*: Statistical significance (p<0.05)
jkacd-34-500-g002
Table 1
Comparison of bacterial turbidity in broth at 630nm wave length after 48hours culture.
jkacd-34-500-i001

A. Turbidity of E. faecalis at 630 nm

B. Turbidity of P. gingivalis at 630 nm

-C0.1: 0.1% CHX, C0.2: 0.2% CHX, C1: 1% CHX, C2: 2% CHX, N0.5: 0.5% NaOCl, N1: 1% NaOCl, N2.5: 2.5% NaOCl, N5.25: 5.25% NaOCl, DW: Distilled water(Control), Av: Average, SD: Standard deviation

Table 2
Comparison of agar diffusion test after 48hours culture (Averages of zones of inhibition)(mm)
jkacd-34-500-i002

A. Diameter of inhibition zone of E. faecalis

B. Diameter of inhibition zone of P. gingivalis

-C0.1: 0.1% CHX, C0.2: 0.2% CHX, C1: 1% CHX, C2: 2% CHX, N0.5: 0.5% NaOCl, N1: 1% NaOCl, N2.5: 2.5% NaOCl, N5.25: 5.25% NaOCl, DW: Distilled water(Control), Av: Average, SD: Standard deviation

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