Table 2

	IF	MP	SF	NPC length	NPC angle
	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)	Mean (SD)
Cylindrical	3.34 (0.99)^A	2.55 (0.87)^A	2.86 (0.89)^A	9.03 (2.53)^A	75.85 (9.27)
Hourglass	3.93 (1.06)^B	1.59 (0.65)^B	3.21 (0.96)^A	10.36 (3.04)^B	78.04 (10.09)
Cone	3.53 (1.08)^A	1.98 (0.73)^C	1.59 (0.6)^B	9.4 (2.37)^A	76.18 (8.37)
Funnel	3.99 (1.2)^B	2 (0.9)^C	2.02 (0.75)^C	9.96 (2.55)^AB	77.07 (8.93)
Banana	3.59 (0.92)^AB	3.04 (0.63)^AD	2.87 (0.85)^AD	11.79 (2.05)^BC	74.36 (7.01)
Reverse funnel	2.33 (0.85)^C	2.27 (0.87)^AC	3.5 (1.01)^AD	8.91 (2.48)^AB	78.13 (8.62)
Total	3.54 (1.11)	2.25 (0.9)	2.53 (1.01)	9.49 (2.61)	76.41 (9.08)
P value	0.000^a	0.000^a	0.000^a	0.000^a	0.148

^aStatistically significant at level P ≤ 0.01 (independent samples Kruskal-Wallis test).
The uppercase superscript indicates statistical differences within column (Dunn-Bonferroni post hoc analysis).
IF = incisive foramen; MP = mid-level point; SF = stenson foramen; NPC = nasopalatine canal; SD = standard deviation.