Killing of S. mutans Bacteria Using a Plasma Needle at Atmospheric Pressure

J Goree; B Liu; D Drake; E Stoffels

doi:10.1109/TPS.2006.878431

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Killing of S. mutans Bacteria Using a Plasma Needle at Atmospheric Pressure

Journal article

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Killing of S. mutans Bacteria Using a Plasma Needle at Atmospheric Pressure

J Goree, B Liu, D Drake and E Stoffels

IEEE transactions on plasma science, Vol.34(4), pp.1317-1324

08/2006

DOI: 10.1109/TPS.2006.878431

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Abstract

Streptococcus mutans (S. mutans) bacteria were killed using a low-power millimeter-size atmospheric-pressure glow-discharge plasma or plasma needle. The plasma was applied to a culture of S. mutans that was plated onto the surface of an agar nutrient in a Petri dish. S. mutans is the most important microorganism for causing dental caries. A spatially resolved biological diagnostic of the plasma is introduced, where the spatial pattern of bacterial colonies in the sample was imaged after plasma treatment and incubation. For low-power conditions that would be attractive for dentistry, images from this biological diagnostic reveal that S. mutans was killed within a solid circle with a 5-mm diameter, demonstrating that site-specific treatment is possible. For other conditions, which are of interest for understanding plasma transport, images show that bacteria were killed with a ring-shaped spatial pattern. This ring pattern coincides with a similar ring in the spatial distribution of energetic electrons, as revealed by Abel-inverted images of the glow. The presence of the radicals OH and O was verified using optical-emission spectroscopy

Details

Title: Subtitle: Killing of S. mutans Bacteria Using a Plasma Needle at Atmospheric Pressure
Creators: J Goree - University of Iowa
B Liu - University of Iowa
D Drake - University of Iowa
E Stoffels - [Faculty of Biomedical Engineering, Eindhovan University of Technology, Eindhoven, Netherlands]
Resource Type: Journal article
Publication Details: IEEE transactions on plasma science, Vol.34(4), pp.1317-1324
DOI: 10.1109/TPS.2006.878431
ISSN: 0093-3813
eISSN: 1939-9375
Language: English
Date published: 08/2006
Academic Unit: Endodontics; Physics and Astronomy; Dental Research; Mechanical Engineering
Record Identifier: 9984199696602771

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