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Nutrient canal identification rates per MRI
| Area | 3 | 3/4 | 4 | 4/5 | 5 | 5/6 | 6 | 6/7 | 7 | Retromolar |
| Number | 219 | 204 | 236 | 212 | 244 | 191 | 237 | 146 | 227 | 208 |
| % of the total cases | 88.0 | 81.9 | 94.8 | 85.1 | 98.0 | 76.7 | 95.2 | 58.6 | 91.2 | 83.5 |
The 3, 4, 5, 6, and seven indicate the canine, first premolar, second premolar, first molar, and second molar, respectively.
The 3/4 indicates the area between the canine and the firsit premolar area. 4/5, 5/6, and 6/7 are similar to 3/4.
