Table 2.

Descriptive analysis on the average imprecision of intra-arch distances

	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	*

SD standard deviation

Cv: variation coefficient

*p < .0001