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J Conserv Dent. 2019 May-Jun;22(3):241-244. doi: 10.4103/JCD.JCD_521_18.

Comparing the antimicrobial efficacy of pediocin with chlorhexidine and calcium hydroxide as intracanal medicaments against persistent root canal infections.

Author information

1
School of Dentistry, International Medical University, Kuala Lumpur, Malaysia.
2
Division of Applied Biomedical Science and Biotechnology, School of Health Sciences, International Medical University, Kuala Lumpur, Malaysia.
3
Division of Clinical Dentistry, School of Dentistry, International Medical University, Kuala Lumpur, Malaysia.

Abstract

Introduction:

The aim of this study is to compare the antimicrobial activity of pediocin with chlorhexidine (CHX) and calcium hydroxide (Ca(OH)2) against Enterococcus faecalis and Staphylococcus epidermidis biofilms.

Materials and Methods:

The prepared root canals of 80 teeth were contaminated with E. faecalis (n = 40) and S. epidermidis (n = 40) for 21 days to create biofilms. The samples in each group were allocated randomly into the following four subgroups (n = 10) according to the decontamination protocol: Group 1: 1% Pediocin, Group 2: 2% CHX, Group 3: Ca(OH)2, and Group 4: saline (negative control). At 5 days, the antimicrobial efficacy of the medicaments against E. faecalis and S. epidermidis was assessed by collecting dentin shavings from the canal walls created using Gates Glidden drill sizes 4 and 5, corresponding to a depth into the root canal walls of 200 μm and 400 μm, respectively. The total number of colony-forming units (CFUs) was counted. The Wilcoxon signed-rank test was used to compare the difference in CFUs between the two depths (P > 0.05).

Results:

There was no bacterial growth in samples treated with pediocin, CHX, or Ca(OH)2 at either depth.

Conclusion:

In this laboratory experimental model, pediocin exhibited the same antimicrobial properties against E. faecalis and S. epidermidis as CHX and Ca(OH)2.

KEYWORDS:

Calcium hydroxide; Enterococcus faecalis; Staphylococcus epidermidis; chlorhexidine

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