Table 1.

Risk of bias assessment

Randomization	Blinding	Incomplete outcome data	Selective outcome reporting	Similarity of groups at baseline	Control of confounding and interaction	Conflict of interest	References
Yes (adequate)	Yes	Yes, Type of tooth extracted was not mentioned	No	Yes	Yes (adequate)	No	Yewale et al. [14]
Yes (adequate)	Yes	Yes, Type of tooth extracted was not mentioned	No	No	No (inadequate)	No	Azangookhiavi et al. [14]
Yes (adequate)	Yes	Yes, Type of tooth extracted was not mentioned	No	No	No (inadequate)	No	Dhamija et al. [16]
Yes (adequate)	Yes	No	No	No	No (inadequate)	No	Ahmed et al. [17]
No (inadequate)	No	No	No	No	No (inadequate)	No	De Angelis et al. [23]
Yes (adequate)	Yes	Yes, Type of tooth extracted was not mentioned	No	No	Yes (adequate)	No	Kollati et al. [18]
No (inadequate)	No	Yes, Type of tooth extracted was not mentioned	No	No	No (inadequate)	Yes, The material was given by a company for free	Mendoza-Azpur et al. [24]
Yes (adequate)	Yes	No	No	No	Yes (adequate)	Yes, the study was funded by a dental company	Clark et al. [19]
No (inadequate)	No	No	No	No	No (inadequate)	No	Zhang et al. [25]
Yes (adequate)	Yes	Yes, Type of tooth extracted was not mentioned	No	No	No (inadequate)	No	Kumar et al. [20]
Yes (adequate)	No	No	No	No	No (inadequate)	No	Thakkar et al. [22]
Yes (adequate)	Yes	No	No	No	No (inadequate)	No	Hauser et al. [21]