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Cold plasma therapy of a tooth root canal infected with Enterococcus faecalis biofilms in vitro

Description:

Introduction Complete sterilization of an infected root canal is an important challenge in endodontic treatment. Traditional methods often cannot achieve high-efficiency sterilization because of the complexity of the root canal system. The objective of the study was to investigate in vitro the feasibility of using a cold plasma treatment of a root canal infected with Enterococcus faecalis biofilms. Methods Seventy single-root teeth infected with E. faecalis biofilms were divided into 7 groups. Group 1 served as the negative control group (no treatment), and group 7 was the positive control group with teeth treated with calcium hydroxide intracanal medication for 7 days. Groups 2 to 6 included teeth treated by cold plasma for 2, 4, 6, 8, and 10 minutes, respectively. The disinfection of the E. faecalis biofilm was evaluated by colony-forming unit (CFU) counting. Scanning electron microscopy was used to evaluate the structural …

Creator:

Jie Pan, Ke Sun, Yongdong Liang, Peng Sun, Xiaohui Yang, Jing Wang, Jue Zhang, Weidong Zhu, Jing Fang, Kurt H Becker

Owner:

skushner@saintpeters.edu

Publisher:

Elsevier

Date Uploaded:

10/31/2018

Date Modified:

10/31/2018

Date Created:

2013/1/1

Rights Statement:

Copyright Undetermined

Resource Type:

Journal
Inactivation of Bacteria in an Aqueous Environment by a Direct-Current, ColdAtmospheric-Pressure Air Plasma Microjet

Description:

A direct‐current, cold‐atmospheric‐pressure air plasma microjet (PMJ) sustained in a quasi‐steady gas cavity in a liquid medium is used to inactivate Staphylococcus aureus (S. aureus) suspended in the liquid. The temperature and the pH value of the liquid change to steady‐state values of about 40 °C and 3.0–4.5, respectively, after 10 min of plasma treatment. The decrease in the pH is attributed to the reaction of NOx produced in the air plasma with water at the gas–liquid interface. The concentrations of NO and NO are measured to be 37 mg · L−1 and 21 mg · L−1, respectively, after a 20 min of plasma treatment. Effective inactivation of S. aureus is found to start after the pH values decreases to about 4.5. This is attributed to the high oxidizing potential of the perhydroxyl radical (HOO•) on the fatty acid in the cell membranes of the microorganisms in the liquid.

Creator:

Fuxiang Liu, Peng Sun, Na Bai, Ye Tian, Haixia Zhou, Shicheng Wei, Yanheng Zhou, Jue Zhang, Weidong Zhu, Kurt Becker, Jing Fang

Owner:

skushner@saintpeters.edu

Publisher:

WILEY‐VCH Verlag

Date Uploaded:

10/31/2018

Date Modified:

10/31/2018

Date Created:

2010/3/22

Rights Statement:

In Copyright

Resource Type:

Journal

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Cold plasma therapy of a tooth root canal infected with Enterococcus faecalis biofilms in vitro

Inactivation of Bacteria in an Aqueous Environment by a Direct-Current, ColdAtmospheric-Pressure Air Plasma Microjet

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