Table 3 Relationship between C-Shaped Canal and taurodontism based on presence, location, and depth of grooves.

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

 

C Canal

Taurodontism

Present

None

Present

None

Groove

Present (N = 2459)

1138.0 (94.1%)

1321.0 (12.2%)

451.0 (49.0%)

2008.0 (18.1%)

None (N = 9541)

71.0 (5.9%)

9470.0 (87.8%)

469.0 (51.0%)

9072.0 (81.9%)

Cramer’s V

0.611

 

0.204

 

Groove Location

Mesial (N = 1667)

847.0 (74.4%)

820.0 (62.1%)

407.0 (90.2%)

1260.0 (62.7%)

Distal (N = 519)

93.0 (8.2%)

426.0 (32.2%)

8.0 (1.8%)

511.0 (25.4%)

Buccal (N = 28)

20.0 (1.8%)

8.0 (0.6%)

3.0 (0.7%)

25.0 (1.2%)

Lingual (N = 245)

178.0 (15.6%)

67.0 (5.1%)

33.0 (7.3%)

212.0 (10.6%)

Cramer’s V

0.323

 

0.154

 

Groove Depth

Shallow (N = 1211)

373.0 (32.8%)

838.0 (63.4%)

195.0 (43.2%)

1016.0 (50.6%)

Deep (N = 1248)

765.0 (67.2%)

483.0 (36.6%)

256.0 (56.8%)

992.0 (49.4%)

Cramer’s V

0.306

 

0.057

 
  1. Cramer’s V Strength: Very strong (> 0.25), Strong (> 0.15), Moderate (> 0.10), Weak (> 0.05), None (≤ 0.05).
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