TABLE 3.

Distribution of root canal types according to Vertucci’s classification, other additional types and new types

	Vertucci’s canal types								Vertucci’s additional types			Other types*	Total
	I	II	III	IV	V	VI	VII	VIII	2-3-2†	3-2‡	1-2-3-2†	2-3-2-1
Mesial root
n	4	285	11	178	2	5	0	2	9	1	0	3	500
%	0.8	57	2.2	35.6	0.4	1	0	0.4	1.8	0.2	0	0.6	100
Distal root
n	205	12	244	4	25	1	6	1	1	0	1	0	500
%	41	2.4	48.8	0.8	5	0.2	1.2	0.2	0.2	0	0.2	0	100

^†Sert and Bayirli additional types,

^‡Gulabivala et al. additional type,

^*Not included in Vertucci’s classification or within the additional types