Three-dimensional evaluation of root dimensions and alveolar ridge width of maxillary lateral incisors in patients with unilateral agenesis

AlRushaid, Sharifah; Chandhoke, Taranpreet; Utreja, Achint; Tadinada, Aditya; Allareddy, Veerasathpurush; Uribe, Flavio

doi:10.1186/s40510-016-0144-y

Progress in Orthodontics

Table 3 Lateral incisor measurements from axial and sagittal sections

From: Three-dimensional evaluation of root dimensions and alveolar ridge width of maxillary lateral incisors in patients with unilateral agenesis

	Group	Mean	SD	25th percentile	50th percentile	75th percentile	p
Axial method
Labiopalatal root width (mm)
At CEJ	MLIA	5.86	0.71	5.60	5.90	6.10	<0.0001*
At CEJ	Control	7.24	0.43	6.90	7.20	7.65	<0.0001*
4 mm apical to CEJ	MLIA	4.99	0.64	4.60	4.99	5.50	<0.0001*
4 mm apical to CEJ	Control	5.97	0.43	5.50	6.05	6.25	<0.0001*
8 mm apical to CEJ	MLIA	4.06	0.69	3.50	4.00	4.60	0.009*
8 mm apical to CEJ	Control	4.86	0.65	4.30	4.65	5.50	0.009*
Mesiodistal root width (mm)
At CEJ	MLIA	4.91	0.31	4.70	4.90	5.20	<0.0001*
At CEJ	Control	5.66	0.54	5.30	5.55	6.15	<0.0001*
4 mm apical to CEJ	MLIA	3.86	0.42	3.50	3.80	4.30	0.003*
4 mm apical to CEJ	Control	4.57	0.69	4.05	4.55	4.95	0.003*
8 mm apical to CEJ	MLIA	3.15	0.42	2.80	3.00	3.30	0.092
8 mm apical to CEJ	Control	3.57	0.68	2.95	3.30	4.20	0.092
Sagittal method
Labiopalatal root width (mm)
At CEJ	MLIA	5.94	0.72	5.60	5.90	6.30	<0.0001*
At CEJ	Control	7.21	0.40	6.90	7.20	7.55	<0.0001*
4 mm apical to CEJ	MLIA	5.01	0.63	4.60	5.00	5.60	<0.0001*
4 mm apical to CEJ	Control	5.94	0.42	5.55	5.85	6.35	<0.0001*
8 mm apical to CEJ	MLIA	4.12	0.70	3.50	4.30	4.60	0.018
8 mm apical to CEJ	Control	4.87	0.67	4.45	4.80	5.60	0.018
Mesiodistal root width (mm)
At CEJ	MLIA	4.85	0.27	4.60	4.90	5.00	<0.0001*
At CEJ	Control	5.74	0.52	5.35	5.70	6.20	<0.0001*
4 mm apical to CEJ	MLIA	3.83	0.43	3.50	3.60	4.20	0.003*
4 mm apical to CEJ	Control	4.53	0.67	3.95	4.50	5.00	0.003*
8 mm apical to CEJ	MLIA	3.06	0.43	2.70	3.00	3.30	0.05
	Control	3.53	0.67	2.90	3.30	4.10
Width at incisal edge (IE, mm)	MLIA	4.40	0.82	3.90	4.40	4.90	<0.0001*
Width at incisal edge (IE, mm)	Control	6.16	0.51	5.90	6.00	6.60
Width at midpoint (mm)	MLIA	5.45	0.95	5.20	5.60	5.90	<0.0001*
Width at midpoint (mm)	Control	7.00	0.23	6.75	7.05	7.20

Since three distance points from CEJ were used to examine the outcomes, in order to minimize type 1 errors arising from multiple outcome assessments (at CEJ, 4 mm apical to CEJ, and 8 mm apical to CEJ), adjustments (based on Bonferroni formula) were made to p values to be deemed statistically significant. A p value of <0.017 was deemed to be statistically significant
*p value is statistically significant at p < 0.017

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