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Comparison of WSLs’ extent change in different regions of tooth surface between groups
| Change in WSLs’ extent | ||||||
|---|---|---|---|---|---|---|
|
|
||||||
| Region | Group | −1 | No change | +1 | Total | p |
| Gingival | Laser | 5 | 267 | 6 | 278 | 0.073 |
| Control | 0 | 267 | 9 | 276 | ||
| Incisal | Laser | 9 | 269 | 0 | 278 | <0.001 |
| Control | 0 | 266 | 10 | 276 | ||
| Mesial | Laser | 5 | 270 | 3 | 278 | 0.018 |
| Control | 1 | 266 | 9 | 276 | ||
| Distal | Laser | 3 | 275 | 0 | 278 | 0.008 |
| Control | 0 | 272 | 4 | 276 | ||
