Deactivation of <i>Streptococcus mutans</i> Biofilms on a Tooth Surface Using He Dielectric Barrier Discharge at Atmospheric Pressure

Imola MOLNAR; Judit PAPP; Alpar SIMON; Sorin Dan ANGHEL

doi:10.1088/1009-0630/15/6/09

Plasma Science and Technology > 2013 > 15(6): 535-541. > DOI: 10.1088/1009-0630/15/6/09

Imola MOLNAR, Judit PAPP, Alpar SIMON, Sorin Dan ANGHEL. Deactivation of Streptococcus mutans Biofilms on a Tooth Surface Using He Dielectric Barrier Discharge at Atmospheric Pressure[J]. Plasma Science and Technology, 2013, 15(6): 535-541. DOI: 10.1088/1009-0630/15/6/09

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Deactivation of Streptococcus mutans Biofilms on a Tooth Surface Using He Dielectric Barrier Discharge at Atmospheric Pressure

1 Babes-Bolyai University, Faculty of Biology and Geology, Cluj-Napoca 400015, Romania 2Babes-Bolyai University, Faculty of Physics, Cluj-Napoca 400084, Romania

Funds: supported by the National University Research Council, Ministry of Education, Research and Innovation, Romania (Grant PN-II-ID-PCE 2007-2013, nr. 446/2009)

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Received Date: October 16, 2011

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Abstract

Abstract

This paper presents a study of the effect of the low temperature atmospheric helium dielectric barrier discharge (DBD) on the Streptococcus mutans biofilms formed on tooth surface. Pig jaws were also treated by plasma to detect if there is any harmful effect on the gingiva. The plasma was characterized by using optical emission spectroscopy. Experimental data indicated that the discharge is very e®ective in deactivating Streptococcus mutans biofilms. It can destroy them with an average decimal reduction time (D-time) of 19 s and about 98% of them were killed after a treatment time of 30 s. According to the survival curve kinetic an overall 32 s treatment time would be necessary to perform a complete sterilization. The experimental results presented in this study indicated that the helium dielectric barrier discharge, in plan-parallel electrode configuration, could be a very e®ective tool for deactivation of oral bacteria and might be a promising technique in various dental clinical applications.
- Streptococcus mutans,
- dielectric barrier discharge,
- plasma treatment,
- biofilm deactivation,
- sterilization

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