Comparison 1. FMS versus control.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Change in PPD: whole mouth, single‐rooted teeth and multi‐rooted teeth	6		Mean Difference (IV, Random, 95% CI)	Subtotals only
1.1 3/4 months	3	82	Mean Difference (IV, Random, 95% CI)	0.01 [‐0.17, 0.19]
1.2 6/8 months	4	117	Mean Difference (IV, Random, 95% CI)	0.03 [‐0.12, 0.17]
2 Change in CAL: whole mouth, single‐ and multi‐rooted teeth	6		Mean Difference (IV, Random, 95% CI)	Subtotals only
2.1 3/4 months	3	82	Mean Difference (IV, Random, 95% CI)	‐0.02 [‐0.26, 0.22]
2.2 6/8 months	4	117	Mean Difference (IV, Random, 95% CI)	0.05 [‐0.11, 0.22]
3 Change in BOP: whole mouth, single‐ and multi‐rooted teeth	7		Mean Difference (IV, Random, 95% CI)	Subtotals only
3.1 3/4 months	4	120	Mean Difference (IV, Random, 95% CI)	‐2.86 [‐7.65, 1.93]
3.2 6/8 months	4	117	Mean Difference (IV, Random, 95% CI)	1.98 [‐5.23, 9.20]