Background:

Herbal remedies can have the role of prevention and control of bad breath Since in the previous studies, therapeutic and antibacterial effect of green tea and peppermint had been proven .we studied and compared the effects of green tea and peppermint mouthwashes on halitosis.

Materials and Methods:

This single-blind clinical trial study with cross over design total of 88 volunteer dental students who complained bad breath and had organoleptic score (>= 2) and higher average test scores were enrolled. The students were divided randomly into two groups Green Tea - Peppermint were assigned. Organoleptic test in the baseline, on the 7 day, 14 and 21 measured after rinsing the mouthwashes .As well as the satisfaction of both plants on the last day was considered. Data analysis was performed using tests; Wilcoxon signed rank test, Mann Whithney u, GEE (Generalized Estimating Equation -ordinal logistic regression).

Inclusion Criteria:

organoleptic number equal to or higher 2 no foods (garlic and onion) 48 hours before organoleptic test

Exclusion Criteria:

systemic disease

• use of antibiotics during study use of other mouthwash during study

investigator