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Year : 2013  |  Volume : 3  |  Issue : 3  |  Page : 120-124

An in vitro comparative antibacterial study of different concentrations of green tea extracts and 2% chlorhexidine on Enterococcus faecalis

Department of Conservative Dentistry and Endodontics, Sri Ramaswamy Memorial Dental College, SRM University, Chennai, Tamil Nadu, India

Correspondence Address:
Leena P Martina
B 13, 5th floor, Brown Stone Apts, Mahalingapuram, Chennai 600 034, Tamil Nadu
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1658-5984.121504

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Aim : The purpose of this study was to comparatively evaluate the antibacterial property of various concentrations of green tea extracts and 2% chlorhexidine (CHX) against Enterococcus faecalis 0(E. faecalis) in vitro. Materials and Methods: The activity of green tea extract and CHX on E. faecalis was measured on agar plates using the agar diffusion method. In addition, the tube dilution method was used to determine the minimum inhibitory concentration (MIC) and minimum bactericidal concentration of green tea extract against E. faecalis. Results: The MIC of green tea extract was found to be 3.5%. The zone of inhibition was found to be concentration dependent. The 2.5% concentration of green tea extract showed 20 mm zone of inhibition, while the 3% concentration demonstrated a 30 mm zone of inhibition. Two percent CHX showed 30 mm zone of inhibition. Conclusion: Three percent concentration of green tea extract showed an antibacterial activity equivalent to 2% CHX against E. faecalis.

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