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Table 2 The canal configuration based on Vertucci’s classification in the mandibular first molars

From: Prevalence of middle mesial canal and radix entomolaris of mandibular first permanent molars in a western Chinese population: an in vivo cone-beam computed tomographic study

Root

Type I

(1)

Type II

(2–1)

Type III

(1–2-1)

Type IV

(2–2)

Type V

(1–2)

Type VI

(2–1-2)

Type VII

(1–2–1-2)

Type VIII

(3)

Mesial root

63 (5.37%)

235 (20.02%)

48 (4.09%)

773 (65.84%)

26 (2.21%)

8 (0.68%)

0 (0)

21 (1.79%)

Distal root

918 (78.19%)

41 (3.49%)

12 (1.02%)

180 (15.33%)

20 (1.70%)

3 (0.26%)

0 (0)

0 (0)

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