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Relationship between panoramic radiograph signs and position of the IAC on CBCT.
| Panoramic radiograph sign | Buccal |
Lingual |
Inferior |
Interradicular |
Total |
|---|---|---|---|---|---|
| No. | No. | No. | No. | No. | |
| Interruption of IAC white line | 27 | 39 | 54 | 6 | 126 |
| Darkening in root apex | 6 | 3 | 15 | 0 | 24 |
| Narrowing of IAC | 0 | 3 | 9 | 0 | 12 |
| Interruption, narrowing of IAC | 6 | 3 | 9 | 0 | 18 |
| Interruption and diversion of IAC | 0 | 3 | 12 | 0 | 15 |
| Interruption of IAC, darkening in root apex | 3 | 3 | 3 | 0 | 9 |
IAC, inferior alveolar canal.
