Résumé
Streptococcus mutans is the most important cariogenic microorganism and plays a major role in the initiation of dental caries. Fluoride mouthrinses can have a significant effect in reduction of this microorganism because of antimicrobial properties of fluoride ion. Two common mouthrinses in markets are Oral-B solution and Irsha solution. The aim of this study was comparison of the efficacy of Oral-B and Irsha fluoride mouthrinses on Streptococcus mutans. In this interventional experimental study, 60 girls of a boarding high school were randomly divided into two equal groups of Oral-B and Irsha. They were asked to use mouthrinse for 4 weeks, twice a day. Saliva of each person was collected before and after using mouthrinse and was sent to the laboratory for microbial culture. The data were analyzed by t-test [a=0.05]. Both of the mouthrinses significantly decreased the level of Streptococcus mutans in saliva [P<0.001 for lrsha mouthrinse, P<0.001 for Oral-B mouthrinse]. Furthermore, it was significantly revealed that Oral-B mouthrinsc was approximately twice more effective than Irsha mouthrinse [P=0.00021]. Both of Oral-B and Irsha fluoride mouthrinses are effective in decreasing the level of Streptococcus mutans in saliva. Also it was determined that Oral-B mouthrinse was approximately twice more effective than Irsha mouthrinse. Snice Irsha mouthrinse has a mild flavour and creates less burning sense, by trying to improve the quality of Irsha mouthnnse. we can practically administer it instead of Oral-B mouthrinse