Table 2 The frequency of failure modes according to the bleaching treatment and curing time
| Â | Group 1 | Group 2 | Group 3 | Group 4 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
At-home bleaching + brushing with a regular dentifrice | At-home bleaching + brushing with an ozonized whitening dentifrice | At-home bleaching + brushing with a commercial whitening dentifrice | Control (no whitening or brushing treatment) | |||||||||
Adhesive | Cohesive | Mixed | Adhesive | Cohesive | Mixed | Adhesive | Cohesive | Mixed | Adhesive | Cohesive | Mixed | |
20 s | 4 | 5 | 3 | 7 | 3 | 2 | 8 | 2 | 2 | 3 | 2 | 7 |
80 s | 5 | 3 | 4 | 9 | 0 | 3 | 8 | 1 | 3 | 5 | 3 | 4 |
P value | 0.686 | 0.245 | 1.00 | 0.569 | ||||||||
Total | 9 | 8 | 7 | 16 | 3 | 5 | 16 | 3 | 5 | 8 | 5 | 11 |