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Mean and standard deviation of the length and width (mm) of the microcracks found before and after preparation.
| Before preparation | After preparation | ||
|---|---|---|---|
| Length | Control group | 0.23 ± 0.06 | 0.23 ± 0.08 |
| Foraminal enlargement | 0.22 ± 0.04a | 0.33 ± 0.07a | |
| Width | Control group | 0.23 ± 0.07 | 0.27 ± 0.08 |
| Foraminal enlargement | 0.26 ± 0.04 | 0.27 ± 0.05 | |
aRepresents statistical difference between before and after preparation.
