Table 1.

Distribution of morphologic configurations in the root canal system of maxillary second premolars.

Type of canal	Canal pattern	Percentage (%)
Type I	1–1	17
Type II	2–1	7
Type III	1–2–1	9
Type IV	2	23
Type V	1–2	23
Type VI	2–1–2	-
Type VII	1–2–1–2	2
Type VIII	3	-
Additional type	1–3	3
Additional type	1–4	1
Additional type	2–1–2–1	1
Additional type	1–2–3	2
Additional type	3–2	2
Additional type	2–3	4
Additional type	2–4	1
Additional type	1–2–1–3	1
Additional type	2–3-2–3	1
Additional type	1–2–4	2
Additional type	1–2–5	1