## 3 Results
However, there was a significant difference between the initial time (T\({}_{0}\)) and after brushing periods (T\({}_{2}\), T\({}_{3}\), T\({}_{4}\)) (\(p\) < 0.001) (Table 7). \begin{table} \begin{tabular}{l l l l l l l} \hline \hline  & **T\({}_{\mathbf{0}}\)** & **T\({}_{\mathbf{1}}\)** & **T\({}_{\mathbf{2}}\)** & **T\({}_{\mathbf{3}}\)** & **T\({}_{\mathbf{4}}\)** & **\(p\)** \\ \hline Charisma & 0.305 \(\pm\) 0.036 \({}^{\mathrm{a}\mathrm{A}}\) & 0.309 \(\pm\) 0.04 \({}^{\mathrm{a}\mathrm{A}}\) & 0.296 \(\pm\) 0.041 \({}^{\mathrm{a}\mathrm{A}}\) & 0.444 \(\pm\) 0.089 \({}^{\mathrm{b}}\) & 0.457 \(\pm\) 0.065 \({}^{\mathrm{b}}\) & \textless{}0.001 \\ \hline G-aenial & 0.296 \(\pm\) 0.039 \({}^{\mathrm{a}\mathrm{A}}\) & 0.304 \(\pm\) 0.037 \({}^{\mathrm{a}\mathrm{A}}\) & 0.310 \(\pm\) 0.032 \({}^{\mathrm{a}\mathrm{A}}\) & 0.430 \(\pm\) 0.069 \({}^{\mathrm{b}}\) & 0.451 \(\pm\) 0.080 \({}^{\mathrm{b}}\) & \textless{}0.001 \\ \hline ELS & 0.405 \(\pm\) 0.034 \({}^{\mathrm{a}\mathrm{C}}\) & 0.411 \(\pm\) 0.031 \({}^{\mathrm{a}\mathrm{C}}\) & 0.406 \(\pm\) 0.041 \({}^{\mathrm{a}\mathrm{C}}\) & 0.460 \(\pm\) 0.038 \({}^{\mathrm{b}}\) & 0.478 \(\pm\) 0.058 \({}^{\mathrm{b}}\) & \textless{}0.001 \\ \hline Neo & 0.365 \(\pm\) 0.038 \({}^{\mathrm{a}\mathrm{B}}\) & 0.368 \(\pm\) 0.039 \({}^{\mathrm{a}\mathrm{B}}\) & 0.375 \(\pm\) 0.039 \({}^{\mathrm{a}\mathrm{B}}\) & 0.461 \(\pm\) 0.059 \({}^{\mathrm{b}}\) & 0.467 \(\pm\) 0.069 \({}^{\mathrm{b}}\) & \textless{}0.001 \\ \hline Ruby & 0.346 \(\pm\) 0.039 \({}^{\mathrm{a}\mathrm{B}}\) & 0.349 \(\pm\) 0.042 \({}^{\mathrm{a}\mathrm{B}}\) & 0.349 \(\pm\) 0.045 \({}^{\mathrm{a}\mathrm{B}}\) & 0.443 \(\pm\) 0.126 \({}^{\mathrm{b}}\) & 0.458 \(\pm\) 0.059 \({}^{\mathrm{b}}\) & \textless{}0.001 \\ \hline \(p\) & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & 0.585 & 0.606 \\ \hline \end{tabular}  \ \begin{tabular}{l l l l l l} \hline \hline  & **T\({}_{\mathbf{0}}\)** & **T\({}_{\mathbf{1}}\)** & **T\({}_{\mathbf{2}}\)** & **T\({}_{\mathbf{3}}\)** & **T\({}_{\mathbf{4}}\)** & **\(p\)** \\ \hline SIR & 29/6/0/0 \({}^{\mathrm{a}}\) & 29/6/0/0 \({}^{\mathrm{a}}\) & 5/26/4/0 \({}^{\mathrm{b}}\) & 0/21/12/2 \({}^{\mathrm{b}}\) & 0/16/17/2 \({}^{\mathrm{b}}\) & \textless{}0.001 \\ \hline SW & 28/7/0/0 \({}^{\mathrm{a}}\) & 28/7/0/0 \({}^{\mathrm{a}}\) & 6/22/6/1 \({}^{\mathrm{b}}\) & 3/20/11/1 \({}^{\mathrm{b}}\) & 2/17/15/1 \({}^{\mathrm{b}}\) & \textless{}0.001 \\ \hline SIR + PP & 30/5/0/0 \({}^{\mathrm{a}}\) & 30/5/0/0 \({}^{\mathrm{a}}\) & 6/27/2/0 \({}^{\mathrm{b}}\) & 1/19/15/0 \({}^{\mathrm{b}\mathrm{c}}\) & 0/13/21/1\({}^{\mathrm{c}}\) & \textless{}0.001 \\ \hline SW + PP & 32/3/0/0 \({}^{\mathrm{a}}\) & 32/3/0/0 \({}^{\mathrm{a}}\) & 5/27/3/0 \({}^{\mathrm{b}}\) & 1/25/7/2 \({}^{\mathrm{b}}\) & 0/19/15/1 \({}^{\mathrm{b}}\) & \textless{}0.001 \\ \hline \(p\) & 0.584 & 0.584 & 0.720 & 0.493 & 0.381 & \\ \hline \end{tabular} 
\begin{tabular}{l l l l l l} \hline \hline  & **T\({}_{\mathbf{0}}\)** & **T\({}_{\mathbf{1}}\)** & **T\({}_{\mathbf{2}}\)** & **T\({}_{\mathbf{3}}\)** & **T\({}_{\mathbf{4}}\)** & **\(p\)** \\ \hline SIR & 29/6/0/0 \({}^{\mathrm{a}}\) & 29/6/0/0 \({}^{\mathrm{a}}\) & 5/26/4/0 \({}^{\mathrm{b}}\) & 0/21/12/2 \({}^{\mathrm{b}}\) & 0/16/17/2 \({}^{\mathrm{b}}\) & \textless{}0.001 \\ \hline SW & 28/7/0/0 \({}^{\mathrm{a}}\) & 28/7/0/0 \({}^{\mathrm{a}}\) & 6/22/6/1 \({}^{\mathrm{b}}\) & 3/20/11/1 \({}^{\mathrm{b}}\) & 2/17/15/1 \({}  
There was no significant difference between the initial SRI scores of composite groups (\(p\) = 0.261). After one week of brushing (T\({}_{2}\)), SRI scores significantly increased for all materials except for Charisma Smart (Table 8). Similar SRI scores were recorded for G'aenial A'chord, Neo Spectra ST, and Ruby after brushing periods (T\({}_{2}\), T\({}_{3}\), T\({}_{4}\)) which were significantly higher than the initial and after discoloration scores (\(p\) < 0.001). The SRI scores of all materials significantly increased after one month of brushing (\(p\) < 0.001).