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Research

Efficacy of ozone on survival and permeability of oral microorganisms
Nagayoshi M, Department of Operative Dentistry and Endodontics
Fukuizumi T, Department of Oral Microbiology, Kyushu Dental College, Kitakyushu, Japan
Kitamura C, Department of Operative Dentistry and Endodontics
Yano J, Department of Operative Dentistry and Endodontics
Terashita M, Department of Operative Dentistry and Endodontics
Nishihara T. Department of Oral Microbiology, Kyushu Dental College, Kitakyushu, Japan
Efficacy of ozone on survival and permeability of oral microorganisms. Oral Microbiol Immunol 2004: 19: 240–246.

Key words: antimicrobial activity; dental plaque biofilm; disinfectant; oral microorganisms; ozone

Abstract

In the present study, we examined the effect of ozonated water on oral microorganisms and dental plaque. Almost no microorganisms were detected after being treated with ozonated water (4 mg/l) for 10 s. To estimate the ozonated water-treated Streptococcus mutans, bacterial cells were stained with LIVE/DEAD BacLight TM Bacterial Viability Kit. Fluorescence microscopic analysis revealed that S. mutans cells were killed instantaneouslyin ozonated water. Some breakage of ozonated water-treated S. mutans was found byelectron microscopy. When the experimental dental plaque was exposed to ozonated water, the number of viable S. mutans remarkablydecreased. Ozonated water stronglyinhibited the accumulation of experimental dental plaque in vitro. After the dental plaque samples from human subjects were exposed to ozonated water in vitro, almost no viable bacterial cells were detected. These results suggest that ozonated water should be useful in reducing the infections caused byoral microorganisms in dental plaque.

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