Study Study design Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 Q13
Praça et al. [17] RCT + + + - - + + + + + + + +
D'Avenia et al. [18] RCT + - + - - + - + + + + + ?
Ríos-Santos et al. [19] RCT + ? + - - + + + + + + + +
Hamudi et al. [20] RCT
(split-mouth design) 		+ ? + - - + + + + + + + +
Moreira et al. [21] RCT + ? + - - + + + + + + + +
Calatrava et al. [22] RCT + + + - - + + + + + + + +
Sanz-Sánchez et al. [23] RCT + ? + - - + + + + + + + +

N/A = not applicable; ? = unclear; + = yes; - = no.