DocumentCode :
1052098
Title :
Pulsed Atmospheric-Pressure Cold Plasma for Endodontic Disinfection ^{\\ast }
Author :
Jiang, Chunqi ; Chen, Meng-Tse ; Schaudinn, Christoph ; Gorur, Amita ; Vernier, P. Thomas ; Costerton, J. William ; Jaramillo, David E. ; Sedghizadeh, Parish P. ; Gundersen, Martin A.
Author_Institution :
Ming Hsieh Dept. of Electr. Eng.-Electrophys., Univ. of Southern California, Los Angeles, CA, USA
Volume :
37
Issue :
7
fYear :
2009
fDate :
7/1/2009 12:00:00 AM
Firstpage :
1190
Lastpage :
1195
Abstract :
A new plasma dental probe (PDP), powered with 4-6-kV ~100-ns electric pulses at repetition rates of up to 2 kHz, generates a room-temperature > 2-cm-long ~2-mm-diameter plasma plume at ambient atmospheric pressure. The shape of the plasma plume depends on the gas flow rate and the pulse voltage. Growth of Bacillus atrophaeus on nutrient agar plates is completely inhibited by exposure to both He and He/(1%)O2 plasmas for 60 s. A 300-s treatment with the He/(1%)O2 plasma disinfected a human tooth root canal colonized with saliva-derived biofilms, demonstrating the potential of the PDP as a simple, safe, and effective tool or adjunct for the disinfection of root canals during endodontic therapy. He/(1%)O2 plasma is more effective than He alone for B. atrophaeus growth inhibition, and the emission spectrum of the He-O2 plasma supports the identification of atomic oxygen as the likely primary reactive chemical species contributing to bacterial inactivation.
Keywords :
biochemistry; decontamination; dentistry; helium; microorganisms; oxygen; plasma materials processing; purification; Bacillus atrophaeus; He; He-O2; atomic oxygen; bacterial inactivation; electric pulses; endodontic disinfection; endodontic therapy; frequency 2 kHz; gas flow rate; growth inhibition; human tooth root canal; nutrient agar plates; plasma dental probe; plasma plume; pulsed atmospheric-pressure cold plasma; saliva-derived biofilms; temperature 293 K to 298 K; time 60 s; voltage 4 kV to 6 kV; Atmospheric pressure; bacteria; disinfection; plasma torch; sterilization;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/TPS.2009.2014870
Filename :
5061875
Link To Document :
بازگشت