H0 - Bonding to NCCLs with DC-SE and SE-Universal adhesives with SE strategies will result in similar (no significant differences) clinical (aesthetic, functional and biologic) behaviour/performance in a period of 24th month evaluation; H0 - Bonding to NCCLs with DC-SE and SE-Universal adhesives with SE strategies will result in similar restorations (aesthetic, functional and biologic) success rates over 24th month evaluation; H0 - Bonding to NCCLs with DC-SE and SE-Universal adhesives with SE strategies will result in similar restoration retention rates in a period of 24th month evaluation; H0 - Bonding to NCCLs DC-SE with enamel pre-etching and Universal adhesives with ER adhesive strategy will result in similar (no significant differences) clinical (aesthetic, functional and biologic) behaviour/performance in a period of 24thmonth evaluation; H0 - Bonding to NCCLs DC-SE with enamel pre-etching and Universal adhesives with ER adhesive strategy will result in similar restorations (aesthetic, functional and biologic) success rates over 24th month evaluation; H0 - Bonding to NCCLs DC-SE with enamel pre-etching and Universal adhesives with ER adhesive strategy will result in similar restoration retention rates in a period of 24th month evaluation; H0 - Bonding to NCCLs with FBDC or FU (DC adhesives) and AU (Light-curing adhesive) with SE or ER adhesive strategies will result in similar (no significant differences) clinical (aesthetic, functional and biologic) behaviour/performance in a period of 24th month evaluation; H0 - Bonding to NCCLs with FBDC or FU (DC adhesives) and AU (Light-curing adhesive) with SE or ER adhesive strategies will result in similar restorations (aesthetic, functional and biologic) success rates over 24th month evaluation; H0 - Bonding to NCCLs with FBDC or FU (DC adhesives) and AU (Light-curing adhesive) with SE or ER adhesive strategies will result in similar restoration retention rates in a period of 24th month evaluation; H0 - FDI or USPHS criteria evaluation outcomes not differ for the same data.