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) | — | — |
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