## 3 Results  
Table 2 shows the descriptive statistics obtained for L* a* b* chromatic coordinates mean values within the different study groups over time. The initial moment is represented by T\({}_{0}\), which corresponds to the baseline. Also, color variation (\(\Delta\)E) between baseline and each of the subsequent color measurement periods of evaluation is shown in Table 2. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**Groups** & **Coordinates** & **T\({}_{\text{0}}\)** & **T\({}_{\text{PO}}\)** & **T\({}_{\text{72H}}\)** & **T\({}_{\text{7D}}\)** & **T\({}_{\text{6M}}\)** & **\(p\)** \\ \hline \multirow{4}{*}{**Control/Saline**} & L* & \(58.6\pm 6.6\) & \(61.6\pm 6.0\) & \(58.6\pm 6.5\) & \(60\pm 6.6\) & \(59.5\pm 7.1\) & \textless{}0.139 \\  & a* & \(1\pm 5.2\) & \(28\pm 5.2\) & \(3.5\pm 6.5\) & \(32\pm 5.9\) & \(3.4\pm 5.3\) & \textless{}0.615 \\  & b* & \(18.1\pm 12.6\) & \(17.6\pm 11.7\) & \(19.1\pm 12.5\) & \(19.3\pm 12.3\) & \(19\pm 12.3\) & \textless{}0.162 \\  & AE & \(3.8\pm 2.1\) & \(2.0\pm 0.7\) & \(2.2\pm 0.9\) & \(1.6\pm 0.6\) & \(-0.615\) \\ \hline \multirow{4}{*}{**MTA/Saline**} & L* & \(59.2\pm 5.6\) & \(60.4\pm 5.6\) & \(55.6\pm 5.2\) & \(52.3\pm 5.1\) & \(52.2\pm 7.3\) & \textless{}0.001 \\  & a* & \(2.0\pm 2.4\) & \(2.0\pm 2.5\) & \(1.1\pm 1.6\) & \(0.8\pm 1.5\) & \(0.7\pm 1.1\) & \textless{}0.070 \\  & b* & \(15.6\pm 6.5\) & \(14.7\pm 6.0\) & \(12.0\pm 5.3\) & \(11.1\pm 4.9\) & \(11.3\pm 5\) & \textless{}0.001 \\  & AE & \(18.8\pm 0.8\) & \(5.5\pm 1.1\) & \(8.6\pm 1.2\) & \(8.5\pm 2.6\) & \textless{}0.001 \\ \hline \multirow{4}{*}{**Biodentine/Saline**} & L* & \(55.6\pm 4.9\) & \(56.0\pm 4.0\) & \(55.6\pm 4.4\) & \(52.5\pm 4.0\) & \(55.5\pm 4.0\) & \textless{}0.012 \\  & a* & \(2.8\pm 3.3\) & \(3.2\pm 2.8\) & \(3.7\pm 2.6\) & \(3.3\pm 2.7\) & \(4.8\pm 2.6\) & \textless{}0.001 \\  & b* & \(16.4\pm 4.7\) & \(16.6\pm 4.1\) & \(17.1\pm 4.3\) & \(16.2\pm 3.8\) & \(19\pm 4.5\) & \textless{}0.003 \\  & AE & \(1.5\pm 0.6\) & \(1.4\pm 0.7\) & \(3.4\pm 0.9\) & \(3.4\pm 0.9\) & \textless{}0.006 \\ \hline \multirow{4}{*}{**TotalFill/Saline**} & L* & \(60.1\pm 5.4\) & \(61.9\pm 4.7\) & \(61.2\pm 5.2\) & \(60.3\pm 5.4\) & \(60.1\pm 4.7\) & \textless{}0.162 \\  & a* & \(0.8\pm 2.7\) & \(0.9\pm 3.1\) & \(11.1\pm 2.9\) & \(1.2\pm 3.0\) & \(1.9\pm 3.0\) & \textless{}0.011 \\  & b* & \(13.0\pm 6.8\) & \(14.2\pm 6.8\) & \(14.8\pm 6.4\) & \(14.6\pm 6.6\) & \(17.7\pm 5.5\) & \textless{}0.001 \\  & AE & \(2.3\pm 0.9\) & \(2.4\pm 0.7\) & \(2.2\pm 0.5\) & \(4.9\pm 2.4\) & \textless{}0.102 \\ \hline \multirow{4}{*}{**PCM/Saline**} & L* & \(59.2\pm 3.4\) & \(60.8\pm 3.6\) & \(60.7\pm 3.6\) & \(56.8\pm 3.6\) & \(61.6\pm 1.3\) & \textless{}0.003 \\  & a* & \(1.4\pm 3.1\) & \(1.5\pm 2.7\) & \(1.2\pm 2.9\) & \(1.2\pm 2.7\) & \(61.1\pm 2.5\) & \textless{}0.171 \\  & b* & \(15.1\pm 6.5\) & \(15.4\pm 5.1\) & \(15.7\pm 6.3\) & \(14.6\pm 6.0\) & \(14.4\pm 5.3\) & \textless{}0.139 \\  & AE & \(2.5\pm 0.5\) & \(1.7\pm 0.8\) & \(2.6\pm 1.5\) & \(5.1\pm 3.9\) & \textless{}0.284 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Mean and standard deviation values of each of the L* a* b* coordinates of each experimental group for all periods of evaluation. \(\Delta\)E values express color variation from baseline (T\({}_{0}\)) to each evaluation timepoint (T\({}_{\text{PO}}\), T\({}_{\text{72H}}\), T\({}_{\text{7D}}\), and T\({}_{\text{6M}}\)). There are statistically significant differences (F(2.11 92.90) = 33.58; \(p<0.001\)) regarding color variation (\(\Delta\)E) over time. All CSC groups showed a statistically significant variation (mainly decreasing) in L* values over time, except TotalFill/Saline group. MTA presented a noticeable reduction in L* values from T\({}_{\text{PO}}\) to T\({}_{\text{TD}}\), regardless of the treatment (saline or blood), as well as PCM contaminated by blood.