Title :
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
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;
Conference_Titel :
Plasma Science (ICOPS), 2013 Abstracts IEEE International Conference on
Conference_Location :
San Francisco, CA
DOI :
10.1109/PLASMA.2013.6635203
