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Microtensile bond strength values in MPa obtained for the different experimental groups and number of adhesive and cohesive failures.
| Experimental group | Mean/MPa | SD | A*-failure | C*-failure |
|---|---|---|---|---|
| Control | 35.3 | 12.8 | 43 | 21 |
| Air abrasion | 35.8 | 13.5 | 66 | 18 |
| Sonic | 37.7 | 12.0 | 66 | 14 |
A*: adhesive; C*: cohesive.
