Table 2 Comparison of radiographic characteristics between ST and LDST

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%