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The frequency and percentage of canal system types according to Vertucci's classification in maxillary first permanent premolars.
| Canal type | No. of teeth (n%) |
|---|---|
| Type I | — |
| Type II | 7 |
| Type III | — |
| Type IV | 75 |
| Type V | 13 |
| Type VI | 2 |
| Type VII | — |
| Type VIII | 3 |
