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Table. 4.

Comparison of bone density (HU) in the extra-alveolar area between T1 and T2 measurements

Site T1 T2 Δ (T2–T1) p-value
Menton 1,888.5 ± 141.4 1,843.7 ± 139.9 −44.8 ± 48.7 0.017*
Top of head 1,730.2 ± 118.5 1,698.6 ± 122.0 −31.6 ± 85.0 0.270
Condyle Medial cortex 872.7 ± 269.3 879.3 ± 293.1 6.6 ± 99.4 0.838
Lateral cortex 887.9 ± 233.6 870.4 ± 295.5 −17.5 ± 120.0 0.656
Can 230.9 ± 69.6 204.1 ± 72.3 −26.8 ± 38.6 0.056
Vertebrae ASC 736.9 ± 306.4 766.3 ± 265.7 29.4 ± 150.8 0.553
PIC 1,068.9 ± 298.9 1,050.3 ± 318.9 −18.6 ± 129.8 0.661
DCan 371.9 ± 94.3 317.7 ± 122.6 −54.2 ± 52.6 0.010*

Values are presented as mean ± standard deviation.

The paired sample t-test (α = 0.05) was performed.

HU, Hounsfield units; T1, before surgery; T2, after surgery; Can, cancellous bone; ASC, anterosuperior cortical bone; PIC, posteroinferior cortical bone; DCan, diagonal cancellous bone.

*p < 0.05.

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