title: Irradiation effects of low temperature multi gas plasma jet on oral bacteria.
abstract: The purpose of this study is to evaluate the sterilization effects of a newly developed low temperature multi gas plasma jet on oral pathogenic microorganisms (Streptococcus mutans [S. mutans], Lactobacillus fermentum [L. fermentum], Aggregatibacter actinomycetemcomitans [A. actinomycetemcomitans]). Plasma gas which generated from O2, N2, Ar and 50% (O2+N2) was irradiated to the microbes. Effect of O2plasma irradiation on S. mutans under scanning electron microscopy (SEM) was also observed. O2plasma was directly applied to dental plaque on human extracted tooth. Then, the depth of enamel resorption area was noted by nanoscale hybrid microscope. O2had the best sterilizing effect for all microbes. The potent bactericidal effect of plasma irradiation was also observed by SEM. Decalcification of enamel was noted significantly lower in plasma irradiated tooth surface compared to no plasma exposure group. These findings revealed that multi gas plasma jet has great potential to be used for dental treatment.
authors.affiliation: Department of Orthodontics, Applied Life Sciences, Hiroshima University Institute of Biomedical and Health Sciences.
authors.forename: Tahsin Raquib
authors.initials: TR
authors.lastname: Abonti
authors.forename: Masato
authors.initials: M
authors.lastname: Kaku
authors.forename: Shunichi
authors.initials: S
authors.lastname: Kojima
authors.forename: Hiromi
authors.initials: H
authors.lastname: Sumi
authors.forename: Shotoku
authors.initials: S
authors.lastname: Kojima
authors.forename: Taeko
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Yuka
authors.initials: Y
authors.lastname: Yashima
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Miyahara
authors.forename: Akitoshi
authors.initials: A
authors.lastname: Okino
authors.forename: Toshitsugu
authors.initials: T
authors.lastname: Kawata
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tanne
authors.forename: Kotaro
authors.initials: K
authors.lastname: Tanimoto
mesh_terms: D003731:Dental Caries; D003743:Dental Enamel; D003773:Dental Plaque; D006801:Humans; D054020:Lasers, Gas; D008855:Microscopy, Electron, Scanning; D013295:Streptococcus mutans; D013696:Temperature