Table 2 Changes in mandibular incisor inclination and clinical crown height (gingival recession) in the three time point intervals (dependent t tests)
T1 | T2 | T3 | T2–T1 | T3–T2 | T3–T1 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | Mean | SD | Mean | SD | P | Mean | SD | P | Mean | SD | P | |
IMPA (L1-MP) (∫) | 99.39 | 7.20 | 103.48 | 7.71 | 104.56 | 8.04 | 4.09 | 4.84 | 0.011* | 1.09 | 4.52 | 0.351 | 5.18 | 4.92 | 0.000* |
L1-NB (∫) | 28.72 | 5.54 | 32.77 | 5.24 | 31.84 | 5.78 | 4.05 | 4.57 | 0.003* | − 0.93 | 3.82 | 0.345 | 3.12 | 5.08 | 0.018* |
L1-NB (mm) | 5.31 | 2.20 | 6.54 | 2.54 | 6.24 | 2.47 | 1.23 | 1.41 | 0.003* | − 0.91 | 1.15 | 0.312 | 0.93 | 1.41 | 0.011* |
L1 to A-Po (mm) | 1.46 | 1.59 | 3.11 | 2.04 | 2.42 | 1.43 | 1.64 | 2.50 | 0.019* | − 0.69 | 2.07 | 0.205 | 0.96 | 1.54 | 0.023* |
Clinical crown height (mm) | 7.32 | 0.80 | 7.30 | 0.99 | 7.78 | 0.94 | − 0.03 | 0.65 | 0.873 | 0.49 | 0.91 | 0.049* | 0.46 | 0.80 | 0.020* |