Table 7 Changes in labial inclination index of upper and lower anterior teeth before and after treatment in 30 children with skeletal Class III malocclusion in the deciduous stage
Indicator | IIA stage | IIIA stage | IIA-IIIA stage | t | P |
|---|---|---|---|---|---|
U1-SN(°) | 91.87 ± 6.12 | 109.12 ± 6.01 | -17.24 ± 7.51 | -12.584 | 0.000*** |
U1-NA(°) | 12.58 ± 7.01 | 27.93 ± 5.65 | -15.35 ± 8.32 | -10.106 | 0.000*** |
U1-NA distance(mm) | 1.71 ± 2.03 | 4.48 ± 1.35 | -2.75 ± 2.40 | -6.270 | 0.000*** |
U1-L1(°) | 152.77 ± 5.19 | 127.25 ± 8.22 | 25.53 ± 11.25 | 12.426 | 0.000*** |
L1-MP(°) | 79.19 ± 5.19 | 87.26 ± 7.10 | -8.07 ± 6.13 | -7.215 | 0.000*** |
L1-NB(°) | 15.21 ± 5.28 | 22.45 ± 6.13 | -7.24 ± 5.88 | -6.741 | 0.000*** |
L1-NB distance(mm) | 2.03 ± 1.18 | 4.08 ± 1.83 | -2.05 ± 1.15 | -9.774 | 0.000*** |