Model Analysis of Digital Models in Moderate to Severe Crowding: In Vivo Validation and Clinical Application

Table 2

Mean linear measurements of arch width and arch length of cast model and two digital models.

	Cast (C)	Cast scan (CS)	Intraoral scan (IS)	Mean difference/
	(mean ± SD)	(mean ± SD)	(mean ± SD)	standard error (p value)
Maxilla
AWC	35.25 ± 2.46	35.20 ± 2.56	34.99 ± 2.41	C-CS	.22/.39 (1.00)
				C-IS	.14/.09 (.45)
				CS-IS	−.08/.39 (1.00)
AWM	48.98 ± 3.75	48.84 ± 3.56	48.88 ± 3.90	C-CS	−.08/.43 (1.00)
				C-IS	−.13/.15 (1.00)
				CS-IS	−.06/.42 (1.00)
AL	40.87 ± 2.88	40.44 ± 2.81	39.28 ± 2.58	C-CS	.26/.53 (1.00)
				C-IS	1.35/.30 (.00)
				CS-IS	1.09/.66 (.23)
Mandible
AWC	27.23 ± 2.86	27.20 ± 2.86	27.10 ± 2.84	C-CS	.03/.41 (1.00)
				C-IS	.13/.06 (.10)
				CS-IS	.10/.42 (1.00)
AWM	42.58 ± 3.11	42.13 ± 3.53	42.43 ± 3.22	C-CS	.45/.55 (1.00)
				C-IS	.15/.06 (.03)
				CS-IS	−.30/.55 (1.00)
AL	36.36 ± 2.46	36.33 ± 2.53	35.51 ± 2.14	C-CS	.14/.50 (1.00)
				C-IS	.95/.26 (.00)
				CS-IS	.81/.51 (.35)

AWC, intercanine width; AWM, intermolar width; AL, arch length ( = 40); values were calculated by RM-ANOVA; ; .