9. Full‐mouth scaling versus full‐mouth disinfection: change in bleeding on probing.

Tooth type: single‐ or multi‐rooted, or both	Baseline pocket depth (mm)	Time (months)	Number of studies (participants)	Mean difference (95% CI) (random‐effects meta‐analysis)	Heterogeneity
Both	5–6	3/4	0 (0)	Not estimable	Not applicable
Both	> 6	3/4	1 (18)	7.00 (0.43, 13.57); P = 0.04	Not applicable
Both	5–6	6/8	0 (0)	Not estimable	Not applicable
Both	> 6	6/8	1 (18)	8.00 (1.18, 14.82); P = 0.02	Not applicable
Single‐rooted	5–6	3/4	1 (18)	2.00 (–3.27, 7.27); P = 0.46	Not applicable
Single‐rooted	> 6	3/4	0 (0)	Not estimable	Not applicable
Single‐rooted	5–6	6/8	2 (46)	–6.69 (–12.18, –1.19); P = 0.02	P = 0.45; I² = 0%
Single‐rooted	> 6	6/8	1 (28)	–18.00 (–30.83, –5.17); P = 0.006	Not applicable
Multi‐rooted	5–6	3/4	1 (18)	5.00 (2.93, 7.07); P < 0.00001	Not applicable
Multi‐rooted	> 6	3/4	0 (0)	Not estimable	Not applicable
Multi‐rooted	5–6	6/8	2 (46)	–4.16 (–8.72, 0.39); P = 0.07	P = 0.68; I² = 0%
Multi‐rooted	> 6	6/8	1 (28)	4.00 (–13.37, 21.37); P = 0.65	Not applicable

CI: confidence interval.