Material conformity and bactericidal properties of high-frequency-pulse-modulated and low-frequency-pulse-excited plasmas

Plasma sterilization attracts an increasing attention as an alternative method for chemical sterilization. In this study, we investigate plasma sterilization for practical applications, particularly in dentistry and oral surgery [1]. Helium-diluted oxygen was excited by a dielectric barrier electrod...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2018-05, Vol.369 (1), p.12026
Main Authors: Okawa, H, Akitsu, T
Format: Article
Language:English
Subjects:
Chemical sterilization
Conformity
Dental materials
Dentistry
Emission analysis
Gas temperature
Neutral gases
Oxygen atoms
Plasmas (physics)
Silicone resins
Spectral emission
Surgery
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Summary:Plasma sterilization attracts an increasing attention as an alternative method for chemical sterilization. In this study, we investigate plasma sterilization for practical applications, particularly in dentistry and oral surgery [1]. Helium-diluted oxygen was excited by a dielectric barrier electrode at normal atmospheric pressure. Control of the neutral gas temperature was performed under the plasma sterilization. The relation between the intensity of the spectral emission from the excited oxygen atoms and bactericidal effect was investigated using Bacillus stearothermophilus and opportunistic infection bacterium. A comparison is performed with a low-frequency wide-gap discharge. Degradation and material conformity were investigated using the Tyvek unwoven fabric for the sterile package and soft-silicone resin, methyl-methacrylate powder filler used in the dental surgery.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/369/1/012026