Impact of green tea intake on clinical improvement in chronic periodontitis: A randomized clinical trial

To investigate the effects of daily consuming of green tea on clinical criteria in Periodontitis. Thirty patients with chronic periodontitis were randomly divided into control and experimental groups after scaling and root planning (SRP). Experimental group consumed green tea herbal for 6 weeks and the control group received no intervention. Clinical indices were measured before and 6 weeks after the intervention, and compared for each groups by non-parametric Wilcoxon test and between two groups by Man–Witheny test. Significance level of the test was considered at 95%. The results showed that probing depth (PD) and bleeding index (BI) reduced significantly in both groups before and after SRP, this reduction in the intervention group was higher than the control group (P=0.003 and 0.031, respectively). On the other hand, reducing the amount of plaque index (PI) despite being significant in each group, was not significant between the two groups (P=0.135). According to the results of this study, daily consumption of green tea herbal can have a positive impact on the treatment of periodontal diseases and can be applied as a supplement for improving the effects of phase I periodontal therapy.