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Quintessence Int 39 (2008), No. 10     6. Oct. 2008
Quintessence Int 39 (2008), No. 10  (06.10.2008)

Page 827-831, PubMed:19093059


In vitro reduction of mutans streptococci by means of ozone gas application
Castillo, Ana / Galindo-Moreno, Pablo / Avila, Gustavo / Valderrama, Mariano / Liébana, José / Baca, Pilar
Objective: To evaluate, in vitro, the antimicrobial effect of ozone gas on strains of reference mutans streptococci and strains isolated from children at a high risk of developing caries.
Method and Materials: A series of dilutions was obtained from a total of 41 strains, and the effect of ozone was determined for applications of 10, 20, and 40 seconds, as well as a control, in terms of the reduction of viable bacteria.
Results: Ozone application for 10 and 20 seconds produced a significant reduction in the number of bacteria, inversely proportional to the bacterial concentration. When exposure lasted 40 seconds, no viable bacteria were obtained.
Conclusions: Both time of application and initial bacterial concentration bear an influence on the antimicrobial effect of ozone on mutans streptococci.

Keywords: antimicrobial agents, caries, caries therapy, in vitro study, mutans streptococci, ozone