Table 7.
Comparison of pre- and postsurgical differences (T2–T1) in mandibular alveolar bone density (HU) between groups of patients who had undergone genioplasty and those who had not
| Site | With G (n = 6) | Without G (n = 4) | p-value | ||
|---|---|---|---|---|---|
| Retromolar pad | 5 mm | BC | −33.0 ± 77.4 | −69.8 ± 107.9 | 0.575 |
| LC† | −35.5 ± 20.7 | −61.2 ± 45.6 | 0.114 | ||
| Can | 5.3 ± 80.9 | −117.3 ± 61.8 | 0.026* | ||
| 10 mm | BC | −108.8 ± 149.7 | −59.7 ± 124.2 | 0.587 | |
| LC | −91.0 ± 80.0 | −102.3 ± 134.7 | 0.885 | ||
| Can | −52.8 ± 41.1 | −82.3 ± 67.3 | 0.459 | ||
| 15 mm | BC | −11.0 ± 13.9 | −18.5 ± 41.6 | 0.696 | |
| LC† | −13.5 ± 22.0 | −30.7 ± 111.2 | 0.610 | ||
| Can | −36.8 ± 35.7 | −70.7 ± 75.4 | 0.432 | ||
| Molar | 5 mm | BC | −48.0 ± 45.0 | −24.5 ± 87.1 | 0.637 |
| LC | −72.8 ± 75.3 | −90.0 ± 65.3 | 0.710 | ||
| Can | −141.8 ± 89.8 | −70.8 ± 46.2 | 0.135 | ||
| 10 mm | BC | −95.0 ± 119.3 | −70.0 ± 67.4 | 0.680 | |
| LC† | −70.3 ± 117.5 | −36.2 ± 52.9 | > 0.999 | ||
| Can† | −80.8 ± 84.6 | −75.8 ± 72.4 | > 0.999 | ||
| 15 mm | BC | −105.5 ± 159.5 | −39.8 ± 52.3 | 0.366 | |
| LC | −36.0 ± 47.5 | −40.3 ± 73.8 | 0.920 | ||
| Can | −52.8 ± 21.6 | −32.3 ± 34.7 | 0.285 | ||
| Premolar | 5 mm | BC | −68.5 ± 68.5 | −64.8 ± 48.7 | 0.923 |
| LC | −74.8 ± 70.2 | −89.5 ± 105.3 | 0.813 | ||
| Can | −23.0 ± 16.2 | −70.5 ± 53.0 | 0.126 | ||
| 10 mm | BC | −41.5 ± 80.2 | −20.7 ± 215.6 | 0.860 | |
| LC† | −87.0 ± 70.9 | −79.0 ± 129.8 | 0.610 | ||
| Can | −24.8 ± 32.9 | −108.0 ± 99.9 | 0.104 | ||
| 15 mm | BC | −122.5 ± 146.6 | −56.8 ± 60.6 | 0.347 | |
| LC | −133.3 ± 146.8 | −41.7 ± 28.2 | 0.302 | ||
| Can | −57.5 ± 33.8 | −72.8 ± 61.3 | 0.664 | ||
| Incisal | 5 mm | BC | −67.0 ± 50.0 | −40.5 ± 61.6 | 0.496 |
| LC | −72.8 ± 88.1 | −62.7 ± 99.6 | 0.874 | ||
| Can | −142.3 ± 96.2 | −76.3 ± 45.6 | 0.177 | ||
| 10 mm | BC | −41.5 ± 38.6 | 7.0 ± 52.6 | 0.155 | |
| LC | −21.0 ± 33.4 | −16.7 ± 43.5 | 0.871 | ||
| Can† | −94.7 ± 27.4 | −87.0 ± 39.8 | 0.548 | ||
| 15 mm | BC | −53.5 ± 111.6 | −24.3 ± 26.2 | 0.641 | |
| LC | −180.8 ± 111.8 | −25.5 ± 62.6 | 0.022* | ||
| Can | −155.0 ± 132.9 | −63.8 ± 46.2 | 0.156 | ||
Values are presented as mean ± standard deviation.
HU, Hounsfield units; T1, before surgery; T2, after surgery; With G, patients with genioplasty; Without G, patients without genioplasty; BC, buccal cortical bone; LC, lingual cortical bone; Can, cancellous bone.
*
p < 0.05.
The independent sample t-tests or †Mann–Whitney tests were performed.