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The rate of screw perforation
| Grade 0 | Grade 1 | Grade 2 | Perforation | P value | |
|---|---|---|---|---|---|
| Template group | 97.4% | 2.6% | 0% | 5.3% | < 0.001* |
| S1 (n) | 19 | 1 | 0 | ||
| S2 (n) | 18 | 0 | 0 | ||
| Conventional group | 86.7% | 6.7% | 6.7% | 13.7% | |
| S1 (n) | 14 | 1 | 1 | ||
| S2 (n) | 12 | 1 | 1 |
*Fisher’s exact test; p < 0.05 considered statistically significant
