Table 4 Comparison of the average difference of alveolar bone changes between extrusion and intrusion movements
From: Alveolar bone changes following bi-maxillary vertical molars’ movements using clear aligners
Variables | Mean ± standard deviation SD (mm) | P value | |
|---|---|---|---|
Extrusion | Intrusion | ||
Buccal surface | |||
Maxillary right 1st molar | 0.14 ± 0.30 | -0.09 ± 0.75 | 0.29 |
Maxillary right 2nd molar | -0.52 ± 1.46 | 0.8 ± 2.98 | 0.16 |
Maxillary left 1st molar | -1.28 ± 0.04 | 0 ± 0 | 0.01* |
Maxillary left 2nd molar | NA | NA | NA |
Mandibular right 1st molar | -0.44 ± 0.83 | -0.22 ± 0.70 | 0.41 |
Mandibular right 2nd molar | 0.06 ± 0.61 | -0.01 ± 0.15 | 0.60 |
Mandibular left 1st molar | -0.34 ± 0.83 | -0.07 ± 0.36 | 0.15 |
Mandibular left 2nd molar | -0.05 ± 0.80 | 0.02 ± 0.22 | 0.77 |
Lingual surface | |||
Maxillary right 1st molar | -0.06 ± 0.84 | -0.10 ± 0.59 | 0.89 |
Maxillary right 2nd molar | -0.32 ± 0.86 | 0.08 ± 0.59 | 0.22 |
Maxillary left 1st molar | -2.19 ± 0.87 | 0.00 ± 0.00 | 0.17 |
Maxillary left 2nd molar | NA | NA | NA |
Mandibular right 1st molar | 0.01 ± 0.27 | -0.10 ± 0.29 | 0.25 |
Mandibular right 2nd molar | 0.02 ± 0.35 | -0.07 ± 0.24 | 0.31 |
Mandibular left 1st molar | 0.05 ± 0.41 | -0.19 ± 0.52 | 0.07 |
Mandibular left 2nd molar | -0.12 ± 0.65 | -0.05 ± 0.29 | 0.73 |