## 3 Results
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & **Sum of Squares** & **df** &
\begin{tabular}{c} **Mean of** \\ **Squares** \\ \end{tabular} & **F** & \(p\) * \\ \hline Between groups & 0.201 & 4 & 0.050 & 87.281 & 0.000 \\ Within groups & 0.026 & 45 & 0.001 & & \\ Total & 0.227 & 49 & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: One-way ANOVA results for R\({}_{0}\)1 values. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & & **Material** & & & \\ \hline  & & **SC** & **FP** & **CS** & **VE** & **VM** \\ \hline \multicolumn{5}{c}{**Mean \(\pm\) SD**} & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** \\ \hline \multirow{3}{*}{T1} & Distilled water & 2.57 \(\pm\) 0.56 * & 0.93 \(\pm\) 0.25 \({}^{\text{\text{\tiny{lb}}}}\) & 1.17 \(\pm\) 0.37 \({}^{\text{\text{\tiny{b}}}}\) & 1.19 \(\pm\) 0.39 \({}^{\text{\text{\tiny{lb}}}}\) & 0.75 \(\pm\) 0.07 \({}^{\text{\text{\tiny{c}}}}\) \\  & Coffee & 2.53 \(\pm\) 0.61 \({}^{\text{\text{\tiny{lb}}}}\) & 0.90 \(\pm\) 0.28 \({}^{\text{\text{\tiny{lb}}}}\) & 1.18 \(\pm\) 0.37 \({}^{\text{\text{\tiny{d}}}}\) & 1.20 \(\pm\) 0.44 \({}^{\text{\text{\tiny{lb}}}}\) & 0.76 \(\pm\) 0.10 \({}^{\text{\text{\tiny{c}}}}\) \\ T2 & Distilled water & 3.62 \(\pm\) 0.48 \({}^{\text{\text{\tiny{lb}}}}\) & 1.04 \(\pm\) 0.51 \({}^{\text{\text{\tiny{lb}}}}\) & 1.29 \(\pm\) 0.43 \({}^{\text{\text{\tiny{lb}}}}\) & 1.24 \(\pm\) 0.34 \({}^{\text{\text{\tiny{lb}}}}\) & 0.77 \(\pm\) 0.04 \({}^{\text{\text{\tiny{lb}}}}\) \\  & Coffee & 5.36 \(\pm\) 0.58 \({}^{\text{\text{\tiny{lc}}}}\) & 1.99 \(\pm\) 0.26 \({}^{\text{\text{\tiny{lc}}}}\) & 1.44 \(\pm\) 0.33 \({}^{\text{\text{\tiny{lb}}}}\) & 2.36 \(\pm\) 1.53 \({}^{\text{\text{\tiny{lb}}}}\) & 2.18 \(\pm\) 0.34 \({}^{\text{\text{\tiny{lb}}}}\) \\ \(\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\text{\texttexttexttexttexttext{\textThe SC group showed the highest mean \(\Delta\)E\({}_{00}\) values at T1 (2.57 \(\pm\) 0.56) followed by VE (1.20 \(\pm\) 0.44), CS (1.18 \(\pm\) 0.37), FP (0.93 \(\pm\) 0.25), and VM (0.76 \(\pm\) 0.10). The VM group exhibited the lowest mean \(\Delta\)E\({}_{00}\) values at T1 (Figure 7). According to the Mann-Whitney U test results after thermocycling, no statistically significant difference was observed between the mean \(\Delta\)E\({}_{00}\) values of FP-VM and CS-VE. While there was a statistically significant difference between the mean \(\Delta\)E\({}_{00}\) values of FP-VM and CS-VE, the mean \(\Delta\)E\({}_{00}\) values of FP-VM and CS-VE. While there was a statistically significant difference  
difference between VM-CS and VM-VE, a statistically significant difference was observed between SC and all other materials. The mean \(\Delta\)E\({}_{00}\) values for all the materials were lower than the perceptibility threshold (\(\Delta\)E\({}_{00}\)\(\leq\) 1.30) at T1, except for SC. Also, the mean \(\Delta\)E\({}_{00}\) values of the SC were above the acceptability threshold (\(\Delta\)E\({}_{00}\)\(\leq\) 2.25) at T1. All tested materials had higher mean \(\Delta\)E\({}_{00}\) values in coffee for 7 days compared to distilled water at T2. These high mean \(\Delta\)E\({}_{00}\) values were statistically significant for SC, FP, and VM but not for CS and VE compared to their distilled water. After immersion in coffee or distilled water, the SC group showed the highest mean \(\Delta\)E\({}_{00}\) values in either coffee solution (5.36 \(\pm\) 0.58) or distilled water (3.62 \(\pm\) 0.48), and the VM groups exhibited the lowest mean \(\Delta\)E\({}_{00}\) values (0.77 \(\pm\) 0.04) in distilled water at T2. The CS group also showed the lowest mean \(\Delta\)E\({}_{00}\) value (1.44 \(\pm\) 0.33) in coffee (Figure 8). As per the Mann--Whitney U test results, while there was no statistically significant difference among FP, VE, and VM in the coffee solution, there was a statistically significant difference among SC and other groups and between VE and VM in distilled water.