Table 3.
Frequency distribution of raters’ preference of smile variable in the frontal, three-quarter, and lateral smile views.
| Arc ratio | Flat | Sloped | Parallel | Reverse | More reverse | X2 | Intragroup P |
|---|---|---|---|---|---|---|---|
| frontal | 46 (5.95%) | 264 (34.2%) | 405 (52.4%) | 30 (3.88%) | 28 (3.62%) | 653 | <0.001 |
| Three-quarter | 71 (9.18%) | 164 (21.2%) | 324 (41.9%) | 142 (18.4%) | 72 (9.31%) | ||
| lateral | 238 (30.8%) | 215 (27.8%) | 222 (28.7%) | 47 (6.08%) | 51 (6.60%) | ||
| Most posterior upper teeth exposure | canine | 1st premolar | 2nd premolar | 1st molar | 2 nd M | ||
| frontal | 90 (11.6%) | 124 (16.0%) | 258 (33.4%) | 165 (21.3%) | 136 (17.6%) | 146 | <0.001 |
| three-quarter | 175 (22.6%) | 116 (15.0%) | 259 (33.5%) | 170 (22.0%) | 53 (6.86%) | ||
| lateral | 34 (4.40%) | 97 (12.5%) | 156 (20.2%) | 275 (35.6%) | 211 (27.3%) | ||
| Upper teeth exposure | 0.5 | 0.75 | 1 | 1.25 | 1.5 | ||
| frontal | 28 (3.62%) | 98 (12.7%) | 86 (11.1%) | 500 (64.7%) | 61 (7.89%) | 897 | <0001 |
| three-quarter | 30 (3.88%) | 149 (19.3%) | 243 (31.4%) | 313 (40.5%) | 38 (4.92%) | ||
| lateral | 29 (3.75%) | 121 (15.7%) | 406 (52.5%) | 164 (21.2%) | 53 (6.86%) | ||
| Lower teeth exposure | 0 | 0.25 | 0.5 | 0.75 | 1 | ||
| frontal | 131 (16.9%) | 90 (11.6%) | 458 (59.2%) | 59 (7.63%) | 35 (4.53%) | 852 | <0.001 |
| three-quarter | 228 (29.5%) | 336 (43.5%) | 114 (14.7%) | 67 (8.67%) | 28 (3.62%) | ||
| lateral | 87 (11.3%) | 363 (47.0%) | 206 (26.6%) | 89 (11.5%) | 28 (3.62%) | ||
| Upper dental midline | 0 | 1 mm | 2 mm | 3 mm | 4 mm | ||
| frontal | 495 (64.0%) | 175 (22.6%) | 23 (2.98%) | 52 (6.73%) | 28 (3.62) | ||
| Buccal corridor | 0 | 0.05 | 0.1 | 0.15 | 0.2 | ||
| frontal | 204 (26.4%) | 359 (46.4%) | 130 (16.8%) | 54 (6.99%) | 26 (3.36%) | ||
| Maxillary gingival display | 0 | 1 mm | 2 mm | 3 mm | 4 mm | ||
| frontal | 526 (68.0%) | 159 (20.6%) | 36 (4.66%) | 30 (3.88%) | 22 (2.85%) | ||
| Cant | 0 | 3 deg | 6 deg | 9 deg | 12 deg | ||
| frontal | 570 (73.7%) | 176 (22.8%) | 21 (2.72%) | 1 (0.13%) | 5 (0.65%) | ||
| Upper lip thickness | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | ||
| lateral | 132 (17.1%) | 198 (25.6%) | 176 (22.8%) | 162 (21.0%) | 105 (13.6%) | ||
| Mouth angle | 20 deg | 25 deg | 30 deg | 35 deg | 40 deg | ||
| lateral | 165 (21.3%) | 73 (9.44%) | 204 (26.4%) | 61 (7.89%) | 270 (34.9%) | ||
| Nasolabial angle | 70 deg | 80 deg | 90 deg | 100 deg | 110 deg | ||
| lateral | 201 (26.0%) | 224 (29.0%) | 77 (9.96%) | 211 (27.3%) | 60 (7.76%) |