Table 1 Incidence and severity of open gingival embrasures
From: Risk factors for open gingival embrasures after clear aligners treatment: a retrospective study
Tooth site | Occurrence | |||
|---|---|---|---|---|
Nonoccurrence | Mild | Moderate | Severe | |
Maxilla | Â | Â | Â | Â |
 13 − 12 | 71 (86.6) | 11 (13.4) | 0 | 0 |
 12 − 11 | 74 (90.2) | 8 (9.8) | 0 | 0 |
 11–21 | 61 (76.3) | 19 (23.2) | 2 (2.4) | 0 |
 21–22 | 75 (91.5) | 5 (6.1) | 2 (2.4) | 0 |
 22–23 | 74 (90.2) | 8 (9.8) | 0 | 0 |
 Total | 355 (86.6) | 51 (12.4) | 4 (1.0) | 0 |
Mandible | Â | Â | Â | Â |
 33 − 32 | 65 (79.3) | 15 (18.3) | 2 (2.4) | 0 |
 32 − 31 | 54 (65.9) | 24 (29.3) | 4 (4.9) | 0 |
 31–41 | 50 (61.0) | 22 (26.8) | 10( 12.2) | 0 |
 41–42 | 53 (64.6) | 26 (31.7) | 3 (3.7) | 0 |
 42–43 | 62 (75.6) | 20 (24.4) | 0 | 0 |
 Total | 284 (69.3) | 107 (26.1) | 19 (4.6) | 0 |