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Percentage distribution in mandibular 1st and 2nd molars according to the number of canals in their distal root (N= 231)
| Tooth type | One distal canal | Two distal canals | Total |
|---|---|---|---|
| Mandibular 1stmolars | 87 (59.6%) | 59 (40.4%) | 146 (100%) |
| Mandibular 2ndmolars | 39 (45.9%) | 46 (54.1%) | 85 (100%) |
