Study of oxygen concentration dependence of the plasma-induced bactericidal effect against enterococcus faecalis

Author

Jie Gu ; Jaramillo, David ; Webster, Paul ; Chunqi Jiang

Author_Institution

Dept. of Biomed. Eng., Univ. of Southern California, Los Angeles, CA, USA

fYear

2013

Firstpage

1

Lastpage

1

Abstract

Enterococcus faecalis are resilient anaerobic bacteria commonly isolated from persistent endodontic infections.¹ They resist conventional intracanal medications by forming biofilms.² Recent research has demonstrated the bactericidal effect of a non-thermal plasma against E. faecalis.³ In this in vitro study we investigated the efficacy of a nanosecond pulsed, atmospheric-pressure He-O₂ plasma for treatment of E. faecalis grown on hydroxyapatite (HA) discs. The effect of oxygen concentration in the He-O₂ mixture for generating non-thermal plasmas disinfecting E. faecalis was discussed. Microbiological analysis using culture and colony forming unit counting as well as confocal laser scanning microscopic imaging were used for the study.

Keywords

chemical analysis; diseases; microorganisms; oxygen; patient treatment; plasma applications; He-O₂; O₂; bactericidal effect; confocal laser scanning microscopic imaging; enterococcus faecalis; hydroxyapatite discs; microbiological analysis; oxygen concentration; persistent endodontic infections; plasma-induced bactericidal effect; resilient anaerobic bacteria; Biomedical imaging; Dentistry; Educational institutions; Microscopy; Plasmas; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Plasma Science (ICOPS), 2013 Abstracts IEEE International Conference on

Conference_Location

San Francisco, CA

ISSN

0730-9244

Type

conf

DOI

10.1109/PLASMA.2013.6635203

Filename

6635203