Variable |  | ST (n = 1988) | LDST (n = 126) | p-value | ||
---|---|---|---|---|---|---|
Side a | Unilateral | 1435 | 72.18% | 37 | 29.37% | < 0.001*** |
Bilateral | 553 | 27.82% | 89 | 70.63% | ||
Arch a | Maxilla | 1837 | 92.40% | 25 | 19.84% | < 0.001*** |
Mandible | 151 | 7.60% | 101 | 80.16% | ||
Morphology b | Conical | 1281 | 64.44% | 16 | 12.70% | < 0.001*** |
Tuberculate | 208 | 10.46% | 3 | 2.38% | ||
Supplemental | 330 | 16.60% | 106 | 84.13% | ||
Odontoma | 166 | 8.35% | 0 | 0.00% | ||
Undefined | 3 | 0.15% | 1 | 0.79% | ||
Localization a | Labial/buccal | 132 | 6.64% | 8 | 6.35% | 0.001** |
Median | 525 | 26.41% | 15 | 11.90% | ||
Palatal/lingual | 1331 | 66.95% | 103 | 81.75% | ||
Orientation b | Normal | 328 | 16.50% | 90 | 71.43% | < 0.001*** |
Inclined | 597 | 30.03% | 27 | 21.43% | ||
Inverted | 665 | 33.45% | 0 | 0.00% | ||
Transverse | 190 | 9.56% | 5 | 3.97% | ||
Horizontal | 43 | 2.16% | 2 | 1.59% | ||
Undefined | 165 | 8.30% | 2 | 1.59% | ||
Developmental stage b | Ac1 | 1632 | 82.09% | 5 | 3.96% | < 0.001*** |
Rc2 | 116 | 5.84% | 18 | 14.29% | ||
R3/43 | 78 | 3.92% | 13 | 10.32% | ||
R1/24 | 45 | 2.26% | 20 | 15.87% | ||
Before R1/25 | 117 | 5.89% | 70 | 55.56% | ||
Eruption status a | Erupted | 226 | 11.37% | 14 | 11.11% | 0.930 |
Impacted | 1762 | 88.63% | 112 | 88.89% | ||
Complications b | Asymptomatic | 1569 | 78.92% | 112 | 88.89% | 0.007** |
Cystic lesion | 44 | 2.21% | 0 | 0.00% | ||
Root resorption | 27 | 1.36% | 8 | 6.35% | ||
Impaction | 170 | 8.55% | 5 | 3.97% | ||
Malposition | 57 | 2.87% | 0 | 0.00% | ||
Rotation | 61 | 3.07% | 0 | 0.00% | ||
Fused tooth | 5 | 0.25% | 0 | 0.00% | ||
Combination6 | 55 | 2.77% | 1 | 0.79% |