Root and Canal Morphology of Mandibular Premolars in a Saudi Subpopulation: A Cone-Beam Computed Tomography Study

Table 3

Distribution of root canal types according to Vertucci’s classification.

Type	I	II	III	IV	V	VI	VII	VIII
First premolar n (%)	355 (70.0)	72 (14.2)	11 (2.2)	51 (10.1)	14 (2.8)	0 (0)	2 (0.4)	2 (0.4)
Second premolar n (%)	449 (91.10)	28 (5.7)	1 (0.2)	14 (2.8)	0 (0)	1 (0.2)	0 (0)	0 (0)