Author, year of study | Teeth randomization | Teeth free of caries or restorations | Control group | Teeth with similar dimensions | Failure mode | Description of the coefficient of variation | Sample size calculation | Blinding of the operator of the testing machine | Risk of bias |
Khamverdi et al., 2013 [1] | N | Y | Y | Y | Y | N | N | N | Medium (4) |
Bitter et al., 2014 [2] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Haragushiku et al., 2015 [3] | N | N | Y | Y | Y | N | N | N | High (3) |
Garcia et al., 2018 [22] | Y | Y | Y | Y | N | N | N | N | Medium (4) |
Suzuki et al. 2019 [23] | Y | Y | Y | Y | N | N | N | N | Medium (4) |
Culhaoglu et al., 2017 [24] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Alkhudhairy et al., 2018 [25] | Y | Y | N | Y | Y | N | N | N | Medium (4) |
Akman et al., 2016 [26] | Y | N | Y | Y | Y | N | N | N | Medium (4) |
Aljamhan et al., 2021 [27] | Y | N | Y | Y | Y | N | N | N | Medium (4) |
Alkhudhairy et al., 2016 [28] | Y | Y | N | Y | Y | N | N | N | Medium (4) |
Ciapala et al., 2021 [29] | N | Y | Y | Y | N | N | N | N | High (2) |
Erik et al., 2020 [30] | Y | Y | Y | Y | Y | N | Y | N | Low (6) |
Abrar et al., 2020 [31] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Seballos et al., 2018 [32] | Y | N | Y | Y | Y | N | N | Y | Medium (5) |
Arisu et al., 2013 [33] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Khoroushi et al., 2019 [34] | Y | y | Y | Y | Y | N | N | N | Medium (5) |
Yu et al., 2017 [35] | Y | N | Y | Y | Y | N | Y | N | Medium (5) |
Ertas et al., 2014 [36] | N | N | Y | Y | Y | N | N | N | High (3) |
Elnaghy, 2014 [37] | Y | N | N | Y | Y | N | N | N | High (3) |
Silva et al., 2021 [38] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Sheikh Ghaderijani et al., 2021 [39] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Moura et al. , 2017 [40] | Y | Y | N | Y | Y | N | N | N | Medium (4) |
Afkhami et al., 2022 [41] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Fan et al., 2017 [42] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Belizario et al., 2019 [43] | N | Y | Y | Y | Y | N | N | N | Medium (4) |
Jalali et al., 2018 [44] | Y | Y | Y | Y | N | N | N | N | Medium (4) |
Kul et al., 2016 [45] | N | Y | Y | Y | Y | N | N | N | Medium (4) |
Victorino et al., 2016 [46] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Saricam et al., 2020 [47] | Y | N | Y | Y | Y | N | N | N | Medium (4) |
Alaghemand et al., 2013 [48] | Y | Y | Y | Y | Y | N | N | N | Medium (5) |
Yadav et al., 2021 [49] | N | Y | N | Y | N | N | N | N | High (2) |
Alkahtany, 2022 [50] | Y | Y | N | Y | Y | N | N | N | Medium (4) |
Wan et al., 2020 [51] | N | Y | Y | Y | Y | N | N | N | Medium (4) |
Shafiei et al., 2020 [52] | Y | Y | Y | Y | Y | N | Y | N | Low (6) |
AlJeaidi, 2020 [53] | Y | Y | N | Y | Y | N | N | N | Medium (4) |