Table 2 The distribution of OGEs across different IOTN classifications and various types of malocclusions
From: Risk factors for open gingival embrasures after clear aligners treatment: a retrospective study
Variables | Male (n) | Female (n) | OGEs | |||
|---|---|---|---|---|---|---|
Nonoccurrence (n) | Mild (n) | Moderate (n) | Severe (n) | |||
IOTN Dental Health Component | Â | Â | Â | Â | Â | Â |
 Level 1 | 2 | 20 | 187 | 30 | 3 | 0 |
 Level 2 | 6 | 44 | 380 | 107 | 13 | 0 |
 Level 3 | 3 | 5 | 59 | 16 | 5 | 0 |
 Level 4 | 1 | 0 | 4 | 4 | 2 | 0 |
 Level 5 | 1 | 0 | 9 | 1 | 0 | 0 |
 Total | 13 | 69 | 639 | 158 | 23 | 0 |
Aesthetic Component (AC) of IOTN | Â | Â | Â | Â | Â | Â |
 1–4 No need | 6 | 41 | 389 | 76 | 5 | 0 |
 5–7 Moderate need | 7 | 26 | 250 | 82 | 18 | 0 |
 8–10 Definite need | 0 | 0 | 0 | 0 | 0 | 0 |
 Total | 13 | 69 | 639 | 158 | 23 | 0 |
Malocclusion | Â | Â | Â | Â | Â | Â |
 Class I | 1 | 27 | 237 | 39 | 4 | 0 |
 Class II | 8 | 22 | 226 | 65 | 9 | 0 |
 Class III | 4 | 20 | 176 | 54 | 10 | 0 |
 Total | 13 | 69 | 639 | 158 | 23 | 0 |