Impact of Orthodontic Brackets on the Intraoral Scan Data Accuracy
Table 2
Horizontal distortion of 3D images assessed by mean absolute error in arch widths between digital and actual measurements (unit: mm).
E4D Dentist
iTero
Model B
Model L
Significant
Model B
Model L
Significant
Maxillary intermolar width
1.76 (1.7)
1.23 (1.32)
NS
0.36 (0.31)
0.29 (0.32)
NS
Mandibular intermolar width
0.44 (0.44)
0.29 (0.31)
NS
0.18 (0.39)
0.60 (0.16)
Maxillary intercanine width
0.93 (0.59)
0.56 (0.82)
NS
0.18 (0.15)
0.34 (0.10)
Mandibular intercanine width
0.39 (0.26)
0.17 (0.24)
NS
0.17 (0.27)
0.49 (0.56)
Trios
Zfx IntraScan
Model B
Model L
Significant
Model B
Model L
Significant
Maxillary intermolar width
0.42 (0.58)
0.26 (0.34)
NS
0.79 (1.07)
0.69 (0.95)
NS
Mandibular intermolar width
0.15 (0.11)
0.38 (0.44)
0.60 (1.06)
0.81 (1.03)
NS
Maxillary intercanine width
0.20 (0.16)
0.18 (0.16)
NS
0.09 (0.27)
0.26 (0.31)
NS
Mandibular intercanine width
0.35 (0.21)
0.46 (0.22)
NS
0.17 (0.40)
0.45 (1.44)
NS
: maximum deviation, which is the difference between maximum and minimum errors of 5 repeated images, which refers to the largest distortion considered as precision of the scanner. (Mann–Whitney test). NS: not significant.
