Table 1. The mean dimensional measurement of the incisive and nasal foramina.

Landmarks	Overall average size (SD) & range in mm	Gender		P value
		Average size (SD) & range in mm
		Male (n = 46)	Female (n = 44)
Incisive foramen (IF)
Labiopalatal width	2.80 (0.82)	3.05 (0.77)	2.56 (0.80)	0.003*
		[0.95–5.10]	[1.28–4.80]		[0.95–5.10]
	Mesiodistal width	3.49 (1.00)	3.55 (1.05)	3.44 (0.96)	0.624
		[1.50–6.60]	[1.80–6.60]	[1.50–5.70]
	Distance to labial alveolus	12.05 (3.07)	11.92 (2.76)	12.19 (3.38)	0.686
		[3.45–18.45]	[4.9–16.27]	[3.45–18.45]
Nasal foramen (NF)
	Labiopalatal width	6.06 (3.00)	6.54 (3.18)	5.56 (2.72)	1.180
		[1.26–16.03]	[1.26–16.03]	[2.42–15.60]
	Width on right NF	6.03 (2.97)	6.76 (3.31)	6.76 (3.31)	0.017*
		[1.53–15.49]	[1.62–15.49]	[1.62–15.49]
	Width on left NF	5.93 (3.04)	6.45 (3.32)	5.39 (2.63)	0.098
		[0.90–16.57]	[0.90–16.57]	[1.70–13.12]

* Independent t-test.