## 3 Results
Although RXD and MF reported different TPc values between protocols (both \(p=0.00\)) (Figure 3), only \(\Delta\)TPc (P1/P2) of RXD exceeded the PTT (RXD = \(-0.039\)\(\pm\) 0.006; MF = \(0.020\)\(\pm\) 0.001). Figure 3: Translucency parameter (TPc) values after 7 days of storage in water. Different letters identify statistical differences between P1 groups. Different numbers identify statistical differences between P2 groups. Bars identify a statistical difference between P1 and P2 (\(p<0.05\)). NX3L = NX3 light-cure, NX3D = NX3 dual-cure, RXL = RelyX Veneer, RXD = RelyX Ultimate, MF = Enamel Plus HRi Flow, MH = Enamel Plus HRi. \begin{table}
\begin{tabular}{c c c c c} \hline  & **t0** & **t1** & **t7** & \(\Delta\)**TP (t0/t7)** \\ \hline  & & & **P1** & \\  & 0.196 (0.001) \({}^{\text{a,1}}\) & 0.198 (0.003) \({}^{\text{a,1}}\) & 0.239 (0.001) \({}^{\text{a,2}}\) & 0.043 (0.001) \({}^{\text{*}}\) \\  & 0.575 (0.010) \({}^{\text{b,1}}\) & 0.580 (0.007) \({}^{\text{b,1}}\) & 0.590 (0.005) \({}^{\text{b,1}}\) & 0.015 (0.01) \\  & 0.284 (0.004) \({}^{\text{c,1}}\) & 0.296 (0.006) \({}^{\text{c,1}}\) & 0.339 (0.003) \({}^{\text{c,2}}\) & 0.055 (0.007) \({}^{\text{*}}\) \\  & 0.297 (0.004) \({}^{\text{c,1}}\) & 0.297 (0.002) \({}^{\text{c,1}}\) & 0.340 (0.001) \({}^{\text{c,2}}\) & 0.043 (0.004) \({}^{\text{*}}\) \\  & 0.511 (0.003) \({}^{\text{e,1}}\) & 0.517 (0.005) \({}^{\text{e,1}}\) & 0.548 (0.001) \({}^{\text{e,2}}\) & 0.038 (0.004) \({}^{\text{*}}\) \\  & 0.497 (0.002) \({}^{\text{e,1}}\) & 0.498 (0.002) \({}^{\text{f,1}}\) & 0.511 (0.003) \({}^{\text{f,2}}\) & 0.014 (0.004) \\ \hline  & & & **P2** & \\  & 0.217 (0.002) \({}^{\text{a,1}}\) & 0.216 (0.004) \({}^{\text{a,1}}\) & 0.236 (0.002) \({}^{\text{a,2}}\) & 0.018 (0.001) \\  & 0.591 (0.005) \({}^{\text{b,1}}\) & 0.585 (0.006) \({}^{\text{b,1}}\) & 0.585 (0.005) \({}^{\text{b,1}}\) & \(-0.006\) (0.01) \\  & 0.285 (0.003) \({}^{\text{c,1}}\) & 0.283 (0.001) \({}^{\text{c,1}}\) & 0.338 (0.001) \({}^{\text{c,2}}\) & 0.053 (0.002) \({}^{\text{*}}\) \\  & 0.348 (0.010) \({}^{\text{d,1}}\) & 0.338 (0.005) \({}^{\text{d,1}}\) & 0.380 (0.006) \({}^{\text{d,2}}\) & 0.031 (0.007) \({}^{\text{*}}\) \\  & 0.491 (0.001) \({}^{\text{e,1}}\) & 0.498 (0.001) \({}^{\text{e,2}}\) & 0.528 (0.001) \({}^{\text{e,3}}\) & 0.037 (0.001) \({}^{\text{*}}\) \\  & 0.481(0.008) \({}^{\text{e,1}}\) & 0.493(0.001) \({}^{\text{f,1}}\) & 0.510(0.005) \({}^{\text{f,2}}\) & 0.029(0.011) \({}^{\text{*}}\) \\ \hline \end{tabular}  
* NX3L = NX3 light-cure, NX3D = NX3 dual-cure, RXL = RelyX Veneer, RXD = RelyX Ultimate, MF = Enamel Plus HRi Flow, MH = Enamel Plus HRi.  
\end{table} 
Table 3: Translucency values of the tested resin luting agents cured with the traditional curing protocol (P1) and the step luting protocol (P2) before (t0) and 1 day (t1) and 7 days (t7) of storage in water. \(\Delta\)TP (t0/t7) describes the difference between translucency value of t0 and t7. Values are expressed as means (standard deviation). Different superscript letters identify statistical differences between groups at the same time point. Different superscript numbers identify differences between each time point (\(p<0.05\)), while \({}^{\text{*}}\) identifies a \(\Delta\)TP (t0/t7) higher than the perceivable translucency threshold value \(\pm\) 0.023.