# Computerized Optical Impression Making of Fully Dentate Upper and Lower Jaws: An In Vitro Study
## 3 Results
### Left, Right and Front Segments  
The CS, TR, TD and IT showed lower mandibular mean trueness values in the left posterior, right posterior and front segment. There was no statistically significant difference between the PS mandibular and maxillary trueness values of these three segments (\(p\) < 0.05, Table 4, Figure 6). There was no statistically significant difference between mandibular and maxillary precision values for all scanners except for the IT, which showed higher mean mandibular precision values (\(p\) < 0.05, Table 4, Figure 7). \begin{table}
\begin{tabular}{c c c} \hline \hline
**Scanner** & **Trueness** & **Precision** \\ \cline{2-3}  & **Mean Value \(\pm\) SD (\(\upmu\)m)** & **Mean Value \(\pm\) SD (\(\upmu\)m)** \\ \hline CS & 29.2 \(\pm\) 9.7 & 25.6 \(\pm\) 4.8 \\ PS & 90.8 \(\pm\) 31.0 & 95.0 \(\pm\) 42.6 \\ IT & 23.5 \(\pm\) 5.3 & 26.0 \(\pm\) 7.7 \\ TR & 20.7 \(\pm\) 5.8 & 18.8 \(\pm\) 4.3 \\ TD & 58.7 \(\pm\) 22.2 & 34.7 \(\pm\) 16.5 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Mean trueness and mean precision values \(\pm\) the standard deviations (SDs) for the full dental arch scans, maxillary and mandibular values combined. \begin{table}
\begin{tabular}{l l l l l l l} \hline \hline \multicolumn{1}{c}{} & \multicolumn{2}{c}{**Trueness**} & \multicolumn{2}{c}{**Precision**} \\ \cline{2-7} \multicolumn{1}{c}{} & \multicolumn{1}{c}{**Left**} & \multicolumn{1}{c}{**Right**} & \multicolumn{1}{c}{**Front**} & \multicolumn{1}{c}{**Left**} & \multicolumn{1}{c}{**Right**} & \multicolumn{1}{c}{**Front**} \\ \hline
**Scanner** & \multicolumn{1}{c}{**Mean Value \(\pm\) SD (\(\mu\)m)**} & \multicolumn{1}{c}{**Mean Value \(\pm\) SD (\(\mu\)m)**} & \multicolumn{1}{c}{**Mean Value \(\pm\) SD (\(\mu\)m)**} & \multicolumn{1}{c}{**} & \\ \hline CS (Maxilla) & 27.7 \(\pm\) 7.9 & 28.8 \(\pm\) 8.7 & 28.9 \(\pm\) 8.5 & 20.9 \(\pm\) 10.9 & 18.8 \(\pm\) 1.3 & 18.3 \(\pm\) 2.7 \\ CS (Mandibula) & 21.1 \(\pm\) 2.7 & 20.5 \(\pm\) 2.5 & 18.8 \(\pm\) 3.2 & 22.5 \(\pm\) 4.4 & 21.1 \(\pm\) 4.1 & 16.0 \(\pm\) 2.0 \\ PS (Maxilla) & 44.5 \(\pm\) 16.5 & 46.0 \(\pm\) 9.3 & 63.4 \(\pm\) 32.1 & 38.1 \(\pm\) 11.0 & 30.0 \(\pm\) 3.1 & 56.4 \(\pm\) 13.4 \\ PS (Mandibula) & 53.2 \(\pm\) 33.7 & 44.6 \(\pm\) 17.7 & 59.5 \(\pm\) 33.1 & 40.4 \(\pm\) 5.6 & 46.5 \(\pm\) 20.4 & 52.8 \(\pm\) 9.8 \\ IT (Maxilla) & 17.5 \(\pm\) 5.2 & 18.9 \(\pm\) 6.4 & 20.8 \(\pm\) 4.2 & 16.4 \(\pm\) 4.9 & 17.8 \(\pm\) 4.2 & 19.3 \(\pm\) 6.3 \\ IT (Handibula) & 11.2 \(\pm\) 2.3 & 13.4 \(\pm\) 1.5 & 19.7 \(\pm\) 6.8 & 24.2 \(\pm\) 9.8 & 18.1 \(\pm\) 5.0 & 31.1 \(\pm\) 8.5 \\ TR (Maxilla) & 20.8 \(\pm\) 5.1 & 21.5 \(\pm\) 7.8 & 21.7 \(\pm\) 5.9 & 15.1 \(\pm\) 4.2 & 10.0 \(\pm\) 2.0 & 15.3 \(\pm\) 2.5 \\ TR (Mandibula) & 12.8 \(\pm\) 4.4 & 14.3 \(\pm\) 1.6 & 15.9 \(\pm\) 0.9 & 15.5 \(\pm\) 4.1 & 12.8 \(\pm\) 3.1 & 13.2 \(\pm\) 2.9 \\ TD (Maxilla) & 31.2 \(\pm\) 13.4 & 35.3 \(\pm\) 16.7 & 34.1 \(\pm\) 10.9 & 11.7 \(\pm\) 2.4 & 11.7 \(\pm\) 1.9 & 17.8 \(\pm\) 4.9 \\ TD (Handibula) & 24.0 \(\pm\) 3.1 & 28.0 \(\pm\) 4.9 & 25.0 \(\pm\) 2.0 & 10.6 \(\pm\) 2.4 & 14.7 \(\pm\) 2.8 & 11.9 \(\pm\) 1.7 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Mean maxillary and mandibular trueness and precision values \(\pm\) standard deviations (SDs) for the front segment, the right posterior segment and left posterior segment. Figure 5: Illustration of the absolute mean trueness (**left**) and the absolute mean precision (**right**) values [\(\mu\)m] of the full dental arch scans (maximlay and mandibular values combined, \({}^{*}\)\(p\) < 0.05).