2. Effects of intervention: survival/loss rate.

Study ID	Restorative treatment	Time points	Result parameters	Results	Comment
Ma 2012	Composite restorations of NCCLs	6 months after the restoration	Loss rate	Lower failure rate in rubber dam group	Chinese reference, translated
Carvalho 2010	Proximal ART restorations in primary molars	6, 12, 18, and 24 months after the restoration	Cumulative survival rate of restorations	Both groups had similar survival rate	Excluded from analysis due to inconsistent data
Kemoli 2010	Proximal ART restorations in primary molars	Within 2 hours, 1 week, 1 month, 5 months, 1 year, 1.5, and 2 years after the restoration	Survival rate of restorations	Significant higher 2‐year survival rate was observed in rubber dam group compared to cotton roll isolation group	‐
Loguercio 2015	Composite restorations of NCCLs	6, 12, and 18 months after the restoration	Retention rate of restorations	No statistical difference between any pair of groups at the 6, 12, and 18‐month recall (P > 0.05)	‐

ART: atraumatic restorative treatment; NCCLs: non‐carious cervical lesions.