Table 4 Root code, number and percentage root canal morphology in the distal root of double rooted mandibular molars—canals of simple and more complex configurations.

Simple configurations

 Root code

D¹

D^1–2

D^1–2–1

D^{1–2–1–2}

D^{2–1–2–1}

 (Corresponding Vertucci’s Type)

(I)

(V)

(III)

(VII)

(N/A)

 Number & percentage

65 (67.71%)

3 (3.13%)

7 (7.29%)

2 (2.08%)

1 (1.04%)

 Total

78 (81.25%)

Complex configurations (unclassifiable via Vertucci’s classification)

 Root code

D^3–1

D^3–2

D^1–3–1

D^3–1–2

D^1–2–5

 Number & percentage

1 (1.04%)

1 (1.04%)

1 (1.04%)

1 (1.04%)

1 (1.04%)

 Total

5 (5.21%)