Study Year of
publication 		Reason for rejection
Schwarz et al. [18] 2018 The same subjects participated in the 2 studies [18,19]
Li et al. [20] 2021 The number of subjects is too small
Andrade et al. [21] 2020 The number of subjects is too small
Schwarz et al. [22] 2016 The study was conducted on animals
Shejali et al. [23] 2020 No control group
Pohl et al. [24] 2016 The number of subjects is too small
Yüceer-Çetiner et al. [25] 2021 Inappropriate control group
Minamizato et al. [26] 2021 No control group
Elfana et al. [27] 2018 Subjects did not undergo implantation after the regenerative procedure
Kim et al. [28] 2021 The study was conducted on animals
Joshi et al. [29] 2016 Subjects did not undergo implantation after the regenerative procedure
Jeong et al. [30] 2014 Subjects did not undergo implantation after the regenerative procedure