Research Article
Risk Factors of Composite Attachment Loss in Orthodontic Patients during Orthodontic Clear Aligner Therapy: A Prospective Study
Table 1
Univariate analyses of attachment loss rate (base on attachments).
| Factors | No. of attachments | Attachments | Rate (%) | χ2 value | value | Lost | Retained |
| Arch | | | | | 0.032 | 0.915 | Maxillary | 740 | 50 | 690 | 6.76 | | | Mandibular | 657 | 44 | 613 | 6.70 | | | Side | | | | | 0.006 | 1.000 | Left | 704 | 47 | 657 | 6.68 | | | Right | 693 | 47 | 646 | 6.78 | | | Tooth position | | | | | 24.472 | 0.0001 | Incisor/canine | 451 | 34 | 417 | 7.54 | | | Premolar | 598 | 20 | 578 | 3.34 | | | Molar | 348 | 40 | 308 | 11.49 | | |
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