Comparative Evaluation of Efficacy of "Green Tea" and "Green Tea with Xylitol" Mouthwashes on the Salivary Streptococcus mutans and Lactobacillus Colony Count in Children: A Randomized Clinical Trial.

AIM: Green tea is an antimicrobial agent that has beneficial effects on oral and dental health. The aim of this study was to compare the effect of "green tea" and "green tea with xylitol" mouthwashes on the salivary Streptococcus mutans and Lactobacillus colony count in children. MATERIALS AND METHODS: In this double-blind randomized controlled clinical trial, 64 children aged 6-12 years were randomly divided into two groups. Subjects were instructed to wash their mouth with 5% "green tea" or 20% "green tea with xylitol" mouthwashes twice a day for a period of 2 weeks. Salivary counts of bacteria were determined at the baseline and after 2 weeks of intervention. RESULTS: A significant difference was found between the average number of bacterial colonies between the two groups after intervention (p < 0.001). CONCLUSION: Findings of this study suggest that the effect of the "green tea with xylitol" mouthwash on reducing the number of salivary colonies of S. mutans and Lactobacillus is significantly higher than that of the "green tea" mouthwash. CLINICAL SIGNIFICANCE: The green tea mouthwash can be advised for dental and oral health of children. How to cite this article: Hajiahmadi M, Yegdaneh A, Homayoni A, et al. Comparative Evaluation of Efficacy of "Green Tea" and "Green Tea with Xylitol" Mouthwashes on the Salivary Streptococcus Mutans and Lactobacillus Colony Count in Children: A Randomized Clinical Trial. J Contemp Dent Pract 2019;20(10):1190-1194.

Comparative Evaluation of Efficacy of Green Tea Mouth Rinse and Green Tea Gel on the Salivary Streptococcus mutans and Lactobacillus Colony Count in 12-18-year-old Teenagers: A Randomized Clinical Trial.

AIMS: Green tea is an antibacterial agent with no significant side effect. This feature makes green tea safe for children to use. The purpose of this study was to compare the effectiveness of green tea gel and mouth rinse on salivary level of Streptococcus mutans and Lactobacillus of teenagers aged 12-18 years. SUBJECTS AND METHODS: In this randomized controlled clinical trial study, 30 children aged 12-18 years were included in the study according to the inclusion criteria and were randomly divided into two groups. Participants in mouth rinse group were asked to rinse their mouth with 0.5% green tea mouthwash twice a day for 2 weeks. In the gel group, participants were requested to brush their teeth with 0.5% green tea gel twice a day for 2 weeks. After 4 weeks of washout period, mouthwash group applied the gel and the gel group rinsed the mouthwash for 2 weeks and with the same instruction as mentioned. Colony count of S. mutans and Lactobacillus was determined before and after intervention and data were analyzed using t-test. RESULTS: According to the independent t-test, there was no significant difference in the salivary levels of S. mutans before and after intervention regarding age and gender (P = 0.33). Results from paired t-test showed significant decrease in the mean count of S. mutans and Lactobacillus colonies in both groups before and after intervention (P < 0.001). CONCLUSIONS: Green tea gel and mouthwash contribute to a significant reduction of salivary levels of S. mutans and Lactobacillus colonies, with a greater effect of mouthwash than the green tea gel, which was not statistically significant.