Table 2.
Failure modes on cracked surfaces of tested groups/subgroups.
| Groups/subgroups | Group I (zirconia) | Group II (veneering ceramic) | Group III (zirconia/veneering ceramic) |
|---|---|---|---|
| Subgroup I (control-grinding) | 8 adhesive failure 2 mix failure |
9 cohesive failure 1 mix failure |
4 cohesive failure 1 adhesive failure 5 mix failure |
| Subgroup II (sandblasting) | 8 adhesive failure 2 mix failure |
8 cohesive failure 2 mix failure |
4 cohesive failure 6 mix failure |
| Subgroup III (long-pulse laser) | 10 adhesive failure | 7 cohesive failure 1 adhesive failure 2 mix failure |
4 cohesive failure 6 mix failure |
| Subgroup IV (short-pulse laser) | 10 adhesive failure | 7 cohesive failure 1 adhesive failure 2 mix failure |
2 cohesive failure 8 mix failure |