Table 3 Comparison of the mean difference of alveolar bone changes between the maxillary and mandibular 1st and 2nd molars following extrusion and intrusion movements
From: Alveolar bone changes following bi-maxillary vertical molars’ movements using clear aligners
Variable | Mean ± standard deviation SD (mm) | |||||||
|---|---|---|---|---|---|---|---|---|
Right 1st molar | Right 2nd molar | Left 1st molar | Left 2nd molar | |||||
Max | Mand | Max | Mand | Max | Mand | Max | Mand | |
Extrusion | ||||||||
Buccal | 0.17 ± 0.37 | -0.55 ± 0.87 | -0.42 ± 1.33 | -0.01 ± 0.78 | -0.13 ± 0.41 | -0.49 ± 0.96 | NA | NA |
P value | 0.003 ** * | 0.27 | 0.160 | -- | ||||
Lingual | 0.05 ± 0.90 | -0.01 ± 0.30 | -0.26 ± 0.79 | 0.02 ± 0.40 | -0.25 ± 0.73 | 0.08 ± 0.49 | NA | NA |
P value | 0.79 | 0.18 | 0.12 | -- | ||||
Intrusion | ||||||||
Buccal | -0.08 ± 0.70 | -0.57 ± 1.18 | 0.61 ± 2.79 | -0.06 ± 0.26 | 0.16 ± 0.63 | -0.18 ± 0.47 | -0.42 ± 0.77 | 0.01 ± 0.19 |
P value | 0.14 | 0.32 | 0.075 | 0.03 * | ||||
Lingual | -0.09 ± 0.55 | -0.16 ± 0.34 | -0.04 ± 0.71 | -0.09 ± 0.26 | 0.00 ± 0.61 | -0.30 ± 0.60 | -0.14 ± 0.80 | -0.04 ± 0.25 |
P value | 0.66 | 0.79 | 0.14 | 0.60 | ||||