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

Table 3

Comparison of linear measurements between mild and severe crowding groups in maxillary dentition (mm).

	Cast (C)		Cast scan (CS)		Intraoral scan (IS)		Mean difference (p value)
	(mean ± SD)		(mean ± SD)		(mean ± SD)
	Mild group	Severe group	Mild group	Severe group	Mild group	Severe group		Mild group	Severe group
Mesiodistal width of central incisor							C-CS	−.04 (.59)	−.04 (1.00)
							C-IS	.02 (1.00)	.05 (.12)
							CS-IS	.06 (.31)	.01 (1.00)
Mesiodistal width of lateral incisor							C-CS	.05 (.26)	.10 (1.00)
							C-IS	−.00 (1.00)	.15 (.00)
							CS-IS	−.05 (.36)	.05 (1.00)
Mesiodistal width of canine							C-CS	−.02 (1.00)	.01 (1.00)
							C-IS	.02 (1.00)	−.01 (1.00)
							CS-IS	.38 (.44)	−.02 (1.00)
Mesiodistal width of first premolar							C-CS	.02 (1.00)	.03 (1.00)
							C-IS	.15 (.00)	.09 (.01)
							CS-IS	.13 (.01)	.06 (1.00)
Mesiodistal width of second premolar							C-CS	.04 (.82)	.04 (1.00)
							C-IS	.14 (.00)	.07 (.29)
							CS-IS	.09 (.06)	.04 (1.00)
Mesiodistal width of first molar							C-CS	.06 (.23)	.07 (1.00)
							C-IS	.07 (.15)	.08 (.25)
							CS-IS	.15 (1.00)	.01 (1.00)
Crowding							C-CS	−.02 (1.00)	.58 (1.00)
							C-IS	.78 (.01)	.86 (.02)
							CS-IS	.64 (.07)	−.27 (1.00)

Mild group (crowding < 3 mm); severe group (crowding > 4.5 mm); mesiodistal width of teeth, = 40; crowding, = 20; values were calculated by RM-ANOVA; ; .