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Table 3 Repeatability of linear measurements (mm) of STL files related to PVS impression

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

  Mean Median SD Cv Significance
Upper arch
13 0.019 0.007 0.041 2.141 *
23 0.025 0.025 0.058 2.325 *
14 0.021 0.008 0.052 2.447 *
24 0.018 0.018 0.008 2.239 *
15 0.023 0.023 0.085 3.689 *
25 0.018 0.018 0.036 2.010 *
16 0.020 0.020 0.120 2.699 *
26 0.021 0.021 0.118 1.351 *
17 0.027 0.027 0.092 2.234 *
27 0.021 0.021 0.091 1.691 *
Lower arch
33 0.060 0.015 0.055 2.007 *
43 0.068 0.018 0.029 1.732 *
34 0.058 0.020 0.060 1.572 *
44 0.054 0.016 0.036 1.696 *
35 0.062 0.019 0.100 1.616 *
45 0.057 0.016 0.094 1.663 *
36 0.053 0.019 0.080 1.507 *
46 0.061 0.015 0.100 1.640 *
37 0.054 0.054 0.090 1.673 *
47 0.056 0.017 0.092 1.639 *
  1. SD: standard deviation
  2. Cv: variation coefficient
  3. *p < .0001