Table 2. Canal configuration in one-rooted mandibular first premolars.

Canals	Canal configurations of the roots									Total
	I	II	III	IV	V	VI	VII	VIII	Unusual
Number	113	3	6	6	27	2	1	0	2	160
Percent	70.6	1.9	3.8	3.8	16.9	1.2	0.6	0	1.2	100