# Factors Affecting Trueness of Intraoral Scans: An Update
## 3 Results
\begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Study**} & \multirow{2}{*}{**IOS**} & \multirow{2}{*}{**Categories**} & \multicolumn{2}{c}{**Mean \(\pm\) SD**} & \multicolumn{2}{c}{**Mean \(\pm\) SD**} \\  & & & **Trueness (\(\upmu\)m)** & **Precision (\(\upmu\)m)** \\ \hline \multirow{4}{*}{[PERSON] et al. (2020)[19]} & Trios (3 Shape A/S) & & 37.70 \(\pm\) 14.12 & 44.7 \(\pm\) 32 \\ \cline{2-5}  & Omniciam (Dentsply-Sirona) & & 57.83 \(\pm\) 22.14 & 72.0 \(\pm\) 521 \\ \cline{2-5}  & i500 (Medit) & & 44.31 \(\pm\) 11.41 & 45.3 \(\pm\) 32 \\ \hline \multirow{4}{*}{[PERSON] et al. (2021)[20]} & Trios 3 (3 Shape A/S) & Without adjacent tooth & 10.35 \(\pm\) 0.22 & 4.95 \(\pm\) 0.30 \\  & & With adjacent tooth & 11.61 \(\pm\) 0.91 & 6.20 \(\pm\) 0.86 \\ \cline{2-5}  & Primescan & Without adjacent tooth & 7.44 \(\pm\) 0.17 & 3.74 \(\pm\) 0.60 \\  & (Dentsply-Sirona) & With adjacent tooth & 10.67 \(\pm\) 0.96 & 4.21 \(\pm\) 1.07 \\ \cline{2-5}  & i500 (Medit) & Without adjacent tooth & 10.48 \(\pm\) 0.34 & 3.98 \(\pm\) 0.58 \\  & & With adjacent tooth & 11.69 \(\pm\) 0.27 & 3.89 \(\pm\) 0.49 \\ \hline [PERSON] et al. (2021)[21] & Trios 3 (3 Shape A/S) & Dental arches & 114 & n/a \\ \hline \multirow{4}{*}{[PERSON] et al. (2020)[22]} & Trios 3 (3 Shape A/S) & High operator experience & 61 \(\pm\) 17 & 73 \(\pm\) 0.039 \\  & Complete Arch & Medium operator experience & 58 \(\pm\) 6 & 52 \(\pm\) 37 \\  & & Low operator experience & 74 \(\pm\) 24 & 113 \(\pm\) 57 \\ \cline{2-5}  & Trios 3 (3 Shape A/S) & High operator experience & 31 \(\pm\) 3 & 26 \(\pm\) 0.43 \\  & Prepared Arch & Medium operator experience & 33 \(\pm\) 6 & 25 \(\pm\) 17 \\ \cline{2-5}  & Omniciam & High operator experience & 120 \(\pm\)10 & 97 \(\pm\) 19 \\  & (Dentsply-Sirona) & Medium operator experience & 135 \(\pm\) 19 & 120 \(\pm\) 61 \\  & Complete Arch & Low operator experience & 121 \(\pm\) 28 & 161 \(\pm\) 121 \\ \cline{2-5}  & Omniciam & High operator experience & 71 \(\pm\) 35 & 42 \(\pm\) 19 \\  & (Dentsply-Sirona) & Medium operator experience & 58 \(\pm\) 9 & 38 \(\pm\) 47 \\  & Prepared Arch & Low operator experience & 82 \(\pm\) 43 & 39 \(\pm\) 18 \\ \hline \multirow{4}{*}{[PERSON] et al. (2021)[24]} & Trios 3 (3 Shape) & Short span extraoral & 28 \(\pm\) 120 & 22 \(\pm\) 123 \\  & Short span intraoral & 38 \(\pm\) 214 & 23 \(\pm\) 125 \\ \cline{2-5}  & Trios 3 (3 Shape) & Long span extraoral & 132 \(\pm\) 413 & 81 \(\pm\) 421 \\  & Long span intraoral & 147 \(\pm\) 461 & 80 \(\pm\) 281 \\ \cline{2-5}  & Omniciam & Short span extraoral & 36 \(\pm\) 146 & 23 \(\pm\) 231 \\  & (Dentsply-Sirona) & Short span intraoral & 45 \(\pm\) 190 & 43 \(\pm\) 244 \\ \cline{2-5}  & Omniciam & Long span extraoral & 118 \(\pm\) 496 & 103 \(\pm\) 626 \\  & (Dentsply-Sirona) & Long span intraoral & 198 \(\pm\) 499 & 198 \(\pm\) 538 \\ \cline{2-5}  & True Definition (3M) & Short span extraoral & 40 \(\pm\) 174 & 29 \(\pm\) 129 \\  & Short span intraoral & 47 \(\pm\) 195 & 31 \(\pm\) 179 \\ \cline{2-5}  & True Definition (3M) & Long span extraoral & 581 \(\pm\) 1387 & 165 \(\pm\) 392 \\  & Long span intraoral & 433 \(\pm\) 1029 & 153 \(\pm\) 448 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Table of articles showing general trueness in relation to desktop/industrial scanners.