Antioxidants as Adjuvants in Periodontitis Treatment: A Systematic Review and Meta-Analysis
Table 8
The role of green tea.
Summary of findings
Green tea compared to placebo for periodontal therapy
Patient or population: periodontal therapy Setting: Intervention: green tea Comparison: placebo
Outcomes
Anticipated absolute effects (95% CI)
Relative effect (95% CI)
No. of participants (studies)
Certainty of the evidence (grade)
Risk with placebo
Risk with green tea
Reduction on bleeding on probing assessed with the bleeding on probing index Follow-up: 1 month
203 per 1.000
0 per 1.000 (0 to 0)
Cannot be estimated
145 (2 RCTs)
⨁⨁⨁⨁ High
Reduction on the plaque index assessed with the Silness and Loe plaque index Follow-up: 1 month
0 per 1.000
0 per 1.000 (0 to 0)
Cannot be estimated
145 (2 RCTs)
⨁⨁⨁⨁ High
Reduction in gingival index assessed with the Loe and Silness gingival index Follow-up: 1 month
1.000 per 1.000
0 per 1.000 (0 to 0)
Cannot be estimated
145 (2 RCTs)
⨁⨁⨁⨁ High
Improvement in clinical attachment loss assessed with clinical attachment loss, in mm. Follow-up: 1 month
1.000 per 1.000
0 per 1.000 (0 to 0)
Cannot be estimated
145 (2 RCTs)
⨁⨁⨁⨁ High
Improvement on probing depth assessed with probing depth, in mm. Follow-up: 1 month
0 per 1.000
0 per 1.000 (0 to 0)
Cannot estimated
145 (2 RCTs)
⨁⨁⨁⨁ High
GRADE working group grades of evidence. High certainty: we are very confident that the true effect lies close to that of the estimate of the effect. Moderate certainty: we are moderately confident in the effect estimate: the true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different. Low certainty: our confidence in the effect estimate is limited: the true effect may be substantially different from the estimate of the effect. Very low certainty: we have very little confidence in the effect estimate: the true effect is likely to be substantially different from the estimate of the effect. The risk in the intervention group (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI). CI: confidence interval. Comments.