The crown-root morphology of central incisors in different skeletal malocclusions assessed with cone-beam computed tomography

Progress in Orthodontics

Table 3 Collum angle/labial surface angle of central incisors among different sagittal skeletal malocclusions (°)

	Class I		Class II		Class III		ANOVA P Value	Scheffe’s test
	Number	Mean ± SD	Number	Mean ± SD	Number	Mean ± SD	ANOVA P Value	I-II	I-III	II-III
Maxillary CA	24	−1.02 ± 6.30	20	5.18 ± 4.97	22	0.43 ± 5.44	0.002**	0.003**	0.688	0.030*
Maxillary LSA	24	14.44 ± 4.06	20	17.78 ± 3.74	22	14.18 ± 4.20	0.008**	0.028*	0.977	0.019*
Mandibular CA	24	0.40 ± 5.80	20	0.82 ± 5.78	22	5.59 ± 5.64	0.006**	0.970	0.013*	0.033*
Mandibular LSA	24	11.32 ± 3.91	20	12.18 ± 4.39	22	15.32 ± 3.05	0.002**	0.759	0.003**	0.034*