Table 2.
Shear bond strengths and failure modes.
| Group Name | Mean (SD) of bond strength (MPa)a |
Failure mode (number of specimens)b |
||||
|---|---|---|---|---|---|---|
| Thermocycle 0 | 50,000 cycles | 100,000 cycles | Thermocycle 0 | 50,000 cycles | 100,000 cycles | |
| no-ETCH | 25.7 (3.0)a | 19.3 (1.4)b | 0.5 (0.9) | C (8) | A/C (8) | A (8) |
| ETCH10 | 23.6 (1.6)a | 24.9 (2.6)a | 20.0 (3.5)a,b | C (8) | C (8) | A/C (8) |
| ETCH30 | 24.3 (1.8)a | 25.7 (3.4)a | 23.0 (3.4)a,b | C (8) | C (8) | A/C (8) |
a Same letters indicate no significant differences (p > 0.05).
b A: adhesive failure at resin composite-cpTi interface; C: cohesive failure within resin composite; A/C: mixed failure of A and C.