Table 1 Comparison of the PTV of 45° and 90° miniscrews over time

At 1 month

4.07^a

7.76

3.72^a

9.19

−4.28

4.71

0.923

At 2 months

4.64^a

7.94

4.64^a

9.76

−4.82

4.42

0.929

At 3 months

5.66^a

6.96

4.04^a

7.85

−2.63

5.56

0.466

At 4 months

5.20^a

6.25

4.07^a

5.89

−1.29

2.90

0.432

At 5 months

4.71^a

6.83

3.68^a

5.66

−2.67

4.13

0.656

At 6 months

2.95^a

5.06

6.01^a

5.13

−8.12

1.40

0.150

P-value^‡