Prevalence and Morphology of C-Shaped Canals in Mandibular First and Second Molars of an Iranian Population: A Cone-Beam Computed Tomography Assessment

Table 3

Frequency of different types of C-shaped canals of different genders and different tooth types in different levels.

Root level	Tooth type	C1		C2		C3		C4
		Male	Female	Male	Female	Male	Female	Male	Female
Orifice	6	2 (25%)	0	6 (35.3%)	3 (17.6%)	0	0	0	0
	7	1 (12.5%)	5 (62.5%)	4 (23.5%)	4 (23.5%)	4 (100%)	0	2 (100%)	0
	value	0.109		0.629		—		—
Coronal	6	0	0	8 (40%)	3 (15%)	0	0	0	0
	7	0	3 (100%)	4 (20%)	5 (25%)	5 (83.3%)	1 (16.7%)	2 (100%)	0
	value	—		.357		—		—
Middle	6	0	0	5 (31.2%)	2 (12.5%)	3 (27.3%)	1 (9.1%)	0	0
	7	0	1 (100%)	4 (25%)	5 (31.2%)	5 (45.5%)	2 (18.2%)	2 (66.7%)	1 (33.3%)
	value	—		.350		1.000		—
Apical	6	0	0	4 (50%)	0	1 (10%)	1 (10%)	3 (25%)	2 (16.7%)
	7	0	1 (100%)	2 (25%)	2 (25%)	4 (40%)	4 (40%)	5 (41.7%)	2 (16.7%)
	value	—		0.428		1.000		1.000

was considered statistically significant.