Table 1.

 C-shaped mandibular first premolars according to Fan et al. classification, and canals bifurcation

C-shape classification			Canals bifurcation
	Total (%)	Cervical third	Middle third	Apical Third	Without bifurcation
Total	110 (100%)	27 (25%)	62 (56.36%)	9 (8.18%)	11 (10%)
C1	4 (3.63)	0	3 (2.72%)	1 (0.90%)	0
C2	10 (9.09)	2 (1.81%)	7 (6.36%)	2 (1.81%)	0
C3	65 (59.09)	21 (19.09%)	43 (39.09%)	1 (0.90%)	0
C4a	24 (21.81)	3 (2.72%)	5 (4.54%)	4 (3.63%)	10 (9.09%)
C4b	2 (1.8)	0	1 (0.90%)	0	1 (0.90%)
Could not be classified	5 (4.54)	1 (0.90%)	3 (2.72%)	1 (0.90%)	0