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. 2016 Oct 17;28(4):162–168. doi: 10.1016/j.sdentj.2016.08.001

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