Table 3. Evaluation of tunnel shapes at 2 years and 13.5 years.
| 2 years/midterm follow up | 13.5 years/long-term follow up | |
|---|---|---|
| Line | 84.9% (N=107) | 86.4% (N=63) |
| Cavitory | 10.3% (N=13) | 10.9% (N=8) |
| Cone | 4.8% (N=6) | 2.7% (N=2) |
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