. 2008 May 15;2(1):20–23. doi: 10.5681/joddd.2008.004

Table 1. Distribution of the root canal number and configuration in the 209 mandibular first permanent molars studied.

	Number of root canals			Root canal configuration (Vertucci¹⁴)
	1	2	3	I	II	III	IV	V	VI	VII	VIII
Mesial roots	2.86%	96.19%	0.95%	2.87%	40.67%	0.48%	52.15%	3.83%	0%	0%	0%
Distal roots	65.57%	34.43%	0%	68.42%	11.96%	1.91%	17.22%	0.49%	0%	0%	0%