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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.

Korean J Orthod 2020;50:157~169 https://doi.org/10.4041/kjod.2020.50.3.157
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