# Accuracy of Different Head Movements of Intraoral Scanner in Full Arch of Both Maxilla and Mandible
## 3 Results
Figure 7 presents the B-L deviations of different tooth positions among six head movements in the mandible. All  
Figure 4: Occlusal deviations at different tooth positions among six head movements in the maxilla. * Statistically different at tooth position among six movements. Figure 5: Occlusal deviations at different tooth positions among six head movements in the mandible. * Statistically different at tooth position among six movements. head movements showed similar trends with slight ups at the lower right first premolar. The statistical result revealed only that tooth position 44 had a significant difference. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline  & \multicolumn{2}{c}{**Maxilla Value**} & \multicolumn{2}{c}{**Mandible Value**} \\ \hline  & **Mean \(\pm\) SD** & **95\% CI** & _p-Value_ & **Mean \(\pm\) SD** & **95\% CI** & _p-Value_ \\ \hline  & & & \(<\)0.001 & & & \(<\)0.001 \\ Linear & 0.098 \(\pm\) 0.073 \({}^{a}\) & (0.086, 0.110) & & 0.078\(\pm\) 0.041 \({}^{d}\) & (0.073, 0.086) & \\ Circle & 0.107 \(\pm\) 0.069 \({}^{a\,c}\) & (0.095, 0.119) & & 0.070 \(\pm\) 0.044 \({}^{d}\) & (0.063, 0.078) & \\ Wave & 0.147 \(\pm\) 0.168 \({}^{b\,c}\) & (0.119, 0.175) & & 0.087 \(\pm\) 0.051 \({}^{d}\) & (0.079, 0.096) & \\
8 & 0.122 \(\pm\) 0.071 \({}^{a}\) & (0.101, 0.134) & & 0.095 \(\pm\) 0.057 \({}^{d}\) & (0.086, 0.104) & \\ S & 0.166 \(\pm\) 0.221 & (0.130, 0.203) & & 0.084 \(\pm\) 0.060 \({}^{d}\) & (0.074, 0.094) & \\ A-P & 0.102 \(\pm\) 0.071 \({}^{a}\) & (0.091, 0.115) & & 0.082 \(\pm\) 0.056 \({}^{d}\) & (0.072, 0.091) & \\ \hline \multicolumn{5}{l}{Different superscript letters in a column indicate statistical significance among groups (_p_ \(<\) 0.05; post hoc Tukey test); one-way ANOVA (K independent groups).} \\ \end{tabular}
\end{table} 
Table 2: Mean absolute deviations of maxilla and mandible buccal-lingual side (mm). Figure 6: B-L deviations at different tooth positions among six head movements in the maxilla. \({}^{*}\) Statistically different at tooth position among six movements. Figure 7: B-L deviations at different tooth positions among six head movements in the mandible. \({}^{*}\) Statistically different at tooth position among six movements. Table 3 includes all maxilla and mandible deviations, showing the significant differences among six head movements (\(p<0.05\)). In the maxilla, the 8-figure movement showed the maximum deviation values (0.128 \(\pm\) 0.086 mm), and Linear movement showed the minimum values (0.096 \(\pm\) 0.07 mm). In the mandible, the maximum values were revealed by the 8-figure movement, while the minimum values were presented by the Circle movement. Figure 8 shows the precision of different head movements in the maxilla. The 8-figure movement showed poor reproducibility in 10 scans. Linear movement, 'Circle', S-figure, and A-P showed similar reproducibility in 1-scans. Figure 9 shows the similar precision of different head movements in the mandible. Figure 8: The box plot shows the repetitive deviation of the six head movements in 10 scans. The 8-figure movement showed poor precision among six movements in the maxilla.