Table 2.
Interphase changes in the bone-anchored maxillary protraction group (paired t-tests). SD, standard deviation
| Pre-treatment | Post-treatment | ||||||
|---|---|---|---|---|---|---|---|
| Variables | Mean | SD | Mean | SD | Diff. | SD | P |
| Sagittal skeletal | |||||||
| SNA | 73.68 | 3.35 | 75.36 | 3.30 | 1.68 | 1.64 | <0.001* |
| SNB | 77.57 | 4.30 | 77.54 | 4.70 | –0.03 | 1.79 | 0.938 |
| ANB | –3.88 | 2.83 | –2.19 | 3.62 | 1.69 | 2.60 | 0.014 |
| WITS | –7.53 | 3.06 | –5.04 | 4.64 | 2.49 | 3.22 | 0.004* |
| Co-A | 80.41 | 4.35 | 83.77 | 4.77 | 3.37 | 2.21 | <0.001* |
| Co–Gn | 116.52 | 5.18 | 118.44 | 5.46 | 1.92 | 3.08 | 0.017 |
| Co–Go | 57.29 | 3.60 | 58.31 | 3.81 | 1.01 | 3.36 | 0.219 |
| NA-Apo | –9.54 | 6.24 | –6.26 | 7.68 | 3.29 | 5.69 | 0.025 |
| Vertical skeletal | |||||||
| Occ Plane to FH | 7.56 | 3.56 | 5.53 | 4.26 | –2.02 | 3.12 | 0.014 |
| FMA (MP–FH) | 29.71 | 4.67 | 28.23 | 4.13 | –1.48 | 2.81 | 0.040 |
| Ar–Go–Gn | 130.73 | 4.62 | 128.66 | 5.25 | –2.08 | 2.26 | 0.001* |
| N–Me | 121.75 | 6.59 | 124.31 | 7.46 | 2.56 | 3.77 | 0.010 |
| Teeth | |||||||
| U1–palatal plane | 108.38 | 7.40 | 109.43 | 8.89 | 1.05 | 3.72 | 0.248 |
| IMPA | 81.40 | 6.03 | 82.79 | 7.51 | 1.39 | 3.95 | 0.154 |
| Overbite | 1.76 | 3.50 | 0.22 | 1.78 | –1.54 | 3.77 | 0.102 |
| Overjet | –4.98 | 2.73 | –2.63 | 4.19 | 2.35 | 3.07 | 0.005* |
| Molar relation | –3.88 | 2.10 | –0.53 | 2.77 | 3.34 | 2.12 | <0.001* |
| Soft tissue | |||||||
| Nasolabial angle | 102.46 | 14.42 | 96.36 | 11.81 | –6.09 | 12.58 | 0.056 |
| G’–Sn–Po’ | 1.40 | 6.52 | 3.81 | 6.89 | 2.41 | 4.25 | 0.028 |
| G’–Sn’ | –2.14 | 3.65 | –0.47 | 3.23 | 1.68 | 2.00 | 0.002* |
| G’–Pg’ | –5.02 | 9.63 | –4.52 | 9.45 | 0.49 | 4.16 | 0.621 |
*Statistically significant after Holm–Bonferroni correction for multiple comparisons.