## 3 Results
### Precision  
The average precision of the upper model without orthodontic brackets from the TRIOS3(r) intraoral scanner was 90.80 \(\pm\) 3.03 microns. The maximum surface deviation was 78 microns, and the minimum surface deviation was 98 microns. The average precision of the upper model without orthodontic brackets from the alginate impression was 92.00 \(\pm\) 3.81 microns with a maximum surface deviation of 80 microns and a minimum surface deviation of 93 microns. The average precision of the upper model with orthodontic brackets from the TRIOS3 was 93.20 \(\pm\) 2.39 microns. Maximum and minimum surface deviations were 92 and 108 microns, respectively. The average precision of the upper model with orthodontic brackets from the alginate impression was 94.00 \(\pm\) 5.24 microns. The maximum surface deviation was 80 microns, and the minimum surface deviation was 103 microns. There was no statistical difference among all groups (\(p\) < 0.05) as in Table 3.  
The average precision of the lower model without orthodontic brackets from the TRIOS3(r) intraoral scanner was 94.90 \(\pm\) 4.09 microns. The maximum surface deviation was 85 microns, and the minimum surface deviation was 100 microns. The average precision of the lower model without orthodontic brackets from the alginate impression was 92.40 \(\pm\) 4.55 microns with a maximum surface deviation of 87 microns and a minimum surface deviation of 99 microns. The average precision of the lower model with orthodontic brackets from the TRIOS3(r) was 96.80 \(\pm\) 4.69 microns. The maximum and minimum surface deviations were 94 and 104 microns, respectively. The average precision of the lower model with orthodontic brackets from the alginate impression was 95.30 \(\pm\) 1.95 microns. The maximum surface deviation was 94 microns, and the minimum surface deviation was 100 microns. There was no statistical difference among all groups (\(p\) < 0.05) as in Table 4.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Lower Arch**} & **IOS** & **Alginate Impression** & \multirow{2}{*}{**Repeated Measure**} \\  & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & \\  & **(Min-Max)** & **(Min-Max)** & **ANOVA * \\  & **(Micron)** & **(Micron)** & **(\(p\)-Value)** \\ \hline \multirow{2}{*}{Without brackets} & 88.00 \(\pm\) 7.69 & 92.40 \(\pm\) 3.95 & \multirow{2}{*}{1.000} \\  & (78–104) & (87–97) & \\ \hline \multirow{2}{*}{With brackets} & 94.70 \(\pm\) 6.43 & 96.10 \(\pm\) 5.99 & \multirow{2}{*}{1.000} \\  & (85–102) & (93–102) & \\ \hline Repeated measure & & & \\ \end{tabular}
\end{table}
Table 2: Average surface deviation (mean difference and standard deviation) in measurements by IOS, alginate, and control in the lower arch.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Upper Arch**} & **IOS** & **Alginate Impression** & \multirow{2}{*}{**Repeated Measure**} \\  & **Mean \(\pm\) SD** & **Mean \(\pm\) SD** & **Accuracy * \\  & **(Min-Max)** & **(Min-Max)** & **(\(p\)-Value)** \\  & **(Micron)** & **(Micron)** & \\ \hline \multirow{2}{*}{Without brackets} & 90.80 \(\pm\) 3.03 & 92.00 \(\pm\) 3.81 & \multirow{2}{*}{1.000} \\  & (79–98) & (80–93) & \\ \hline \multirow{2}{*}{With brackets} & 93.20 \(\pm\) 2.39 & 94.00 \(\pm\) 5.24 & \multirow{2}{*}{1.000} \\  & (92–108) & (80–103) & \\ \hline Repeated measure & & & \\ \end{tabular}
\end{table}
Table 3: Average surface deviation (mean difference and standard deviation) in measurements by IOS, alginate, and control in the upper arch.  
Color maps showing the precision assessment measured through the alginate impression and TRIOS3(r) intraoral scanners are shown in Figure 6.  
Figure 6: Color maps showing the precision assessment measured through the alginate impression and TRIOS3(r) intraoral scanners.