Comparison 1. Rubber dam versus cotton rolls.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1.1 Survival rate (6 months)	2		Odds Ratio (IV, Fixed, 95% CI)	2.29 [1.05, 4.99]
1.2 Survival rate (12 months)	1		Odds Ratio (IV, Fixed, 95% CI)	1.38 [0.45, 4.28]
1.3 Survival rate (18 months)	1		Odds Ratio (IV, Fixed, 95% CI)	1.00 [0.45, 2.25]
1.4 Survival rate (24 months)	1	559	Hazard Ratio (IV, Fixed, 95% CI)	0.80 [0.66, 0.97]
1.5 Chair time	1		Mean Difference (IV, Fixed, 95% CI)	‐0.40 [‐2.26, 1.46]