Table 1.
The number of complete and incomplete microcracks before and after instrumentation with XPES and PTU.
| Type of microcrack | Groups | Number of microcracks | |||
|---|---|---|---|---|---|
| Apical | Middle | Cervical | |||
| Complete | XPES | Before | 0 | 1 | 8 |
| After | 0 | 3 | 19 | ||
| P value | 1.000 | 0.157 | 0.0001∗ | ||
| PTU | Before | 1 | 2 | 11 | |
| After | 1 | 5 | 20 | ||
| P value | 1.000 | 0.083 | 0.011∗ | ||
| XPES vs. PTU | P value | 1.000 | 0.636 | 0.685 | |
|
| |||||
| Incomplete | XPES | Before | 3 | 23 | 41 |
| After | 3 | 41 | 45 | ||
| P value | 1.000 | 0.0001∗ | 0.465 | ||
| PTU | Before | 8 | 27 | 35 | |
| After | 10 | 37 | 37 | ||
| P value | 0.317 | 0.317 | 0.627 | ||
| XPES vs. PTU | P value | 0.317 | 0.025∗ | 0.662 | |
∗ Statistically significant difference.