Research Article
Root Canal Morphology of Mandibular First Permanent Molars in an Indian Population
Table 3
Frequency of isthmi and apical deltas in mesial and distal roots.
| Group (no. of roots) | Isthmi | Apical deltas |
| Mesial root (150) | 45 (30%) | 15 (10%) | Distal root (150) | 15 (10%) | 9 (6%) | Distolingual root (8) | ā | ā |
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