“…Of these, 31 studies were excluded [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ], the reasons for exclusion are mentioned in the supplementary material (Table S4) , totalizing 74 articles in the qualitative analysis. Of these, 13 studies were excluded: In 9 studies, there were not enough study groups to perform any comparison [ 39 , 40 , 48 , 49 , 50 , 51 , 52 , 53 , 54 ], 2 studies did not have any control group [ 38 , 55 ], 1 study combined data from different generations of adhesives [ 56 ], and 1 study did not present the mean and SD [ 57 ]. Thus, 61 studies were included in the meta-analysis.…”