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Table 2 Descriptive analysis on the average imprecision of intra-arch distances

From: Comparative analysis of intraoral scanners accuracy using 3D software: an in vivo study

  Mean Median Sd Cv Significance
Upper arch
13–23 −0.060 −0.003 0.220 −3.64 *
14–24 0.022 0.011 0.188 8.67 *
15–25 0.023 0.007 0.141 6.19 *
16–26 −0.002 0.000 0.139 −56.62 *
17–27 −0.061 −0.001 0.276 −4.53 *
Lower arch
43–33 −0.007 0.005 0.199 −29.98 *
44–34 0.025 0.010 0.155 6.22 *
45–35 0.055 0.024 0.183 3.31 *
46–36 −0.056 −0.001 0.283 −5.05 *
47–37 −0.006 0.003 0.304 −48.75 *
  1. SD standard deviation
  2. Cv: variation coefficient
  3. *p < .0001