Table 2. Means (µm) and standard deviation of wear of the groups studied, comparing the two treatments [bleaching (B) and acid etching + bleaching (A)] and the control group.
| Groups | Mean ± Standard Deviation* |
|---|---|
| C (no bleaching) | 4.86±1.28A |
| TBO35HLB | 10.47±1.58BD |
| TBO35HLA | 12.49±1.60CDE |
| LPS35HLB | 9.97±1.42BD |
| LPS35HLA | 14.21±0.83C |
| LPS25HLB | 13.85±1.71C |
| LPS25HLA | 23.67±3.93F |
| LPL15HLB | 9.80±1.52B |
| LPL15HLA | 13.51±1.38CE |
| EXP10VHLB | 11.13 ±0.82BDE |
| EXP10VHLA | 14.70±0.40C |
*Different capital letters indicate a statistically significant difference between lines, at the level of 5% calculated by the Tukey´s method