Table 2.
Number and percentage of failed brackets.
| Bracket type | Bonded, N | Failures after 6 months, N | Failures after 12 months, N | Failures after 12 months, % |
|---|---|---|---|---|
| Metallic | 195 | 12 | 14 | 7.2 |
| Ceramic | 186 | 2 | 2 | 1.1 |
| Total | 381 | 14 | 16 | 4.2 |
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