Table 3 The prevalence of CSRCs in different types of RGs and canal bifurcations.

From: Prevalence and correlation of C-shaped root canals of mandibular premolars and molars in Eastern Chinese individuals

  

MFPs

MSPs

Types of RGs (CSRCs)

Mesiolingual

368 (175)

2 (1)

Mesial

1 (0)

 

Distal

 

1 (1)

Buccal

3 (3)

 

Lingual

37 (20)

5 (3)

Mesiolingual and Buccal

12 (6)

 

Buccal and Lingual

1 (1)

 

P value

0.338

1

Types of canal bifurcations (CSRCs)

Coronal

79 (47)

1 (1)

Middle

214 (122)

2 (2)

Apical

31 (13)

 

Non

98 (23)a

5 (2)

P value

 < 0.001

0.643

  1. CSRCs: C-shaped root canals, RGs: radicular grooves, MFPs: mandibular first premolars, MSPs: mandibular second premolars.
  2. aThe prevalence of CSRCs in Non-group was significantly lower than that in the other group.