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Bracket failure rates per tooth type after 12-month observation period.
| Tooth type | Brackets bonded | Failures after 12 months | Failure rate (%) |
|---|---|---|---|
| Mesial incisor | 80 | 4 | 5 |
| Lateral incisor | 79 | 3 | 3.8 |
| Canine | 80 | 5 | 6.25 |
| First premolar | 68 | 3 | 4 |
| Second premolar | 74 | 1 | 1.3 |
