Table 2 Impact of variables defined in the methodology on teeth eruption after DC removal

Intervention and Comparison

Spontaneous eruption

Lack of spontaneous eruption

Spontaneous eruption

Lack of spontaneous eruption

Spontaneous eruption

Lack of physiological eruption of the opposite teeth

Spontaneous eruption

Lack of spontaneous eruption

Number of teeth/number of observations (n)

45/60

15/60

38/47

9/47

15/15

9/15

15/21

6/21 (no eruption after 360 days)

Time elapsed from marsupialization to orthodontic force application

X

NR

X

NR

X

No orthodontic treatment performed

X

NR

Eruption period (days)

90.4 ± 91.8

65.4 ± 141.5

109

NR

263 ± 33

807 ± 112

174 ± 84

NR

Mean age (years)

10.5 ± 1.9

13.7 ± 4.8

10.6 ± 2.0

13.1 ± 2.9

9.1 ± 0.8

9.1 ± 0.8

9.8 ± 2.1

13.2 ± 2.8

Sex (n)

33 M, 27F

34 M, 24F (whole group with canines)

7 M, 4F

12 M, 9F

Cusp depth (mm)

4.5 ± 4.3

9.8 ± 5.7

4.4 ± 4.5

9.3 ± 6.31

5.4 ± 5.2

3.5 ± 2.7

S: 14, D:1^a

S: 2, D: 4^a

Angulation (°)

24.6 ± 21.5

52.7 ± 45.0

21.8 ± 20.4

67.7 ± 49.8

39.1 ± 31.6

10.5 ± 8.3

62.6 ± 19.6

26.6 ± 21.7

Root formation

NR

NR

 < 1/2: 17, 1/2–3/4: 11, 3/4–4/4 (open apex): 9, mature root: 1

 < 1/2: 3, 1/2–3/4: 0, 3/4–4/4 (open apex): 2, mature root: 4

 < 1/2: 7, 1/2–3/4: 10

 < 1/2: 6, 1/2–3/4: 7, 3/4–4/4: 4

 < 1/2: 9, > 1/2: 6

 < 1/2: 5, > 1/2:1

Cyst area (mm²)

513.0 ± 240.2

465.1 ± 344.2

533.8 ± 239.8

546.7 ± 406.5

231.9 ± 197.8

No cyst

NR

Space/tooth size

1.1 ± 0.2

0.8 ± 0.6

1.0 ± 0.2

1.0 ± 0.5

1.26 ± 0.23

1.28 ± 0.24

1.08 ± 0.36

1.14 ± 0.12