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

Table 2

The frequency of different types of C-shaped canals in different levels and in different genders in mandibular first and second molars.

Tooth type	Type of C-shaped canal	Orifice		Coronal		Middle		Apical
		Male	Female	Male	Female	Male	Female	Male	Female
First molar	C1	2 (18.2%)	0	0	0	0	0	0	0
	C2	6 (54.5%)	3 (27.3%)	8 (72.7%)	3 (27.3%)	5 (45.5%)	2 (18.2%)	4 (36.4%)	0
	C3	0	0	0	0	3 (27.3%)	1 (9.1%)	1 (9.1%)	1 (9.1%)
	C4	0	0	0	0	0	0	3 (27.3%)	2 (18.2%)
	value	0.566		—		1.000		0.333
Second molar	C1	1 (5.0%)	5 (25.0%)	0	3 (15.0%)	0	1 (5.0%)	0	1 (5.0%)
	C2	4 (20.0%)	4 (20.0%)	4 (20.0%)	5 (25.0%)	4 (20.0%)	5 (25.0%)	2 (10%)	2 (10%)
	C3	4 (20.0%)	0	5 (25.0%)	1 (5.0%)	5 (25.0%)	2 (10%)	4 (20.0%)	4 (20.0%)
	C4	2 (10.0%)	0	2 (10%)	0	2 (10%)	1 (5.0%)	5 (25.0%)	2 (10%)
	value	0.022		0.055		0.525		0.650

was considered statistically significant.