“…The remaining studies ( n = 13) were assessed by full-text reading: three used bovine teeth ( Comar et al, 2015 ; Machado et al, 2019 ; Scandiffio et al., 2018 ), and one evaluated dentine ( João Souza et al., 2020 ). Two studies did not realize the intervention group ( Austin et al, 2014 ; Passos, Rodrigues & Santiago, 2018 ), and three evaluated primary teeth ( Elwardani, Harhash & Zaky, 2019 ; Maden et al, 2017 ; Rallan et al, 2013 ), conflicting with the previously established eligibility criteria. Finally, four studies were selected in this systematic review according to the eligibility criteria ( Bradna et al, 2015 ; João Souza et al., 2017 ; Panich & Poolthong, 2009 ; Ranjitkar et al, 2009 ) ( Fig.…”