Table 1. Comparisons of deviations in images from the iTero® and Trios® scanners according to severity of tooth irregularity (units, µm).

Values are presented as mean (standard deviation).

iTero®: Align Technology Inc., San Jose, CA, USA; Trios®: 3Shape Dental Systems, Copenhagen, Denmark.

^*Statistically significant difference among the models by one-way ANOVA (p < 0.05, Duncan's post hoc test: A < B < C).

^a,b,c,dStatistically significant difference among the sections (RM, RP, RA, LA, LP, and LM) of all models by one-way ANOVA (p < 0.005, Duncan's post hoc test; a < b < c < d).

C1, Ideal arch dentition; C2, mildly crowded dentition; C3, moderately crowded dentition; C4, severely crowded dentition; RM, the right molar region; RP, the right premolar region; RA, the right anterior region; LA, the left anterior region; LP, the left premolar region; LM, the left molar region; total, the entire arch.