Table 5 Distribution of the bracket failure rates
Number | Bracket failure | Censored | Percent of censored | Failure rate (%) | Log-rank | |
|---|---|---|---|---|---|---|
Adhesive type | ||||||
Clearfil | 333 | 11 | 323 | 96.7 | 3.30 | 0.316 |
Transbond | 333 | 9 | 323 | 97.3 | 2.70 | |
Dental arch | ||||||
Maxillary | 332 | 8 | 324 | 97.6 | 2.54 | 0.622 |
Mandibular | 334 | 12 | 322 | 96.4 | 3.79 | |
Bracket type | ||||||
Incisor | 180 | 3 | 277 | 98.9 | 1.07 | 0.046* |
Canine | 140 | 2 | 138 | 98.6 | 1.42 | |
Premolar | 246 | 15 | 231 | 93.9 | 6.09 | |
Sex | ||||||
Female | 446 | 10 | 428 | 97.7 | 2.24 | 0.303 |
Male | 220 | 10 | 218 | 95.6 | 4.55 | |