Table 2 Distribution of C-Shaped Canal Sub-Classifications across different regions.

From: Multinational cross-sectional study and meta-analysis on radicular grooves, C-shaped canals, and taurodontism in mandibular first premolars across 20 countries

 

Coronal (N = 568)

Middle (N = 963)

Apical (N = 888)

Total (N = 2419)

Class 1

186.0 (32.8%)

147.0 (15.3%)

64.0 (7.2%)

395.0 (16.3%)

Class 2

2.0 (0.4%)

129.0 (13.4%)

84.0 (9.5%)

215.0 (8.9%)

Class 3

10.0 (1.8%)

237.0 (24.6%)

275.0 (31.0%)

522.0 (21.6%)

Class 4a

123.0 (21.7%)

101.0 (10.5%)

110.0 (12.4%)

334.0 (13.8%)

Class 4b

175.0 (30.8%)

162.0 (16.8%)

101.0 (11.4%)

438.0 (18.1%)

Class 4c

72.0 (12.7%)

118.0 (12.3%)

120.0 (13.5%)

310.0 (12.8%)

Class 5

0.0 (0.0%)

67.0 (7.0%)

46.0 (5.2%)

113.0 (4.7%)

Class 6

0.0 (0.0%)

2.0 (0.2%)

88.0 (9.9%)

90.0 (3.7%)

Back to article page