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J Indian Soc Pedod Prev Dent. 2017 Jan-Mar;35(1):41-46. doi: 10.4103/0970-4388.199227.

Effect of green tea mouth rinse on Streptococcus mutans in plaque and saliva in children: An in vivo study.

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  • 1Department of Pedodontics and Preventive Dentistry, Government Dental College, Jaipur, Rajasthan, India.
  • 2Department of Pedodontics and Preventive Dentistry, Jaipur Dental College, Jaipur, Rajasthan, India.
  • 3Department of Dentistry, Goyal Child and Dental Clinic, Jaipur, Rajasthan, India.
  • 4Department of General Dentistry, S.P. Medical College, Bikaner, Rajasthan, of, India.



This study was conducted to evaluate and compare the antimicrobial efficacy of green tea catechin as a mouth wash on colony count of Streptococcus mutans in children.


A sample size of thirty children was selected out of screened 290 children by simple random sampling between the age group of 7 and 12 years. The study was conducted over a period of 2 weeks. After 24 h of oral prophylaxis, the baseline samples were collected and each group was subjected to mouth rinsing with green tea mouth wash for 2 weeks and further plaque and saliva samples were collected at 1- and 2-week intervals from baseline. Microbiological analysis of plaque and saliva samples was done by Dentocult SM strip kit (Orion Diagnostica, Finland), and the results were statistically analyzed and tabulated.


Statistically, there was highly significant reduction in S. mutans count in plaque as well as in saliva for after 1- and 2-week intervals from baseline.


Hence, finally, our study showed that green tea catechin is effective as a mouth wash against S. mutans and having better action in plaque as compared to saliva. It can be used as an adjunct to commercially available mouthwashes.

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