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Table 3 Cross-sectional c-shaped mandibular second molars at different root levels, according to Fan et. Al [5] in male patients

From: Root canal morphology and variations in mandibular second molars: an in vivo cone-beam computed tomography analysis

Root level

C1%

C2%

C3%

C4%

Cervical

52.63

26.31

21.05

0

Middle

26.31

36.84

42.10

0

apical

10.52

5.2

52.63

31.57