pISSN 2234-7518
eISSN 2005-372X

Table. 6.

Comparison of pre- and postsurgical differences (T2–T1) in maxillary 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
Tuberosity 5 mm BC −11.5 ± 78.5 −19.3 ± 99.6 > 0.999
LC −25.0 ± 83.4 −29.3 ± 25.7 > 0.999
Can −66.5 ± 33.2 −109.3 ± 70.3 0.400
10 mm BC −62.5 ± 33.2 82.5 ± 111.0 0.333
LC −69.0 ± 5.7 −71.0 ± 19.8 > 0.999
Can - - -
15 mm BC - - -
LC - - -
Can - - -
Molar 5 mm BC −31.0 ± 39.7 6.5 ± 33.3 0.176
LC −8.3 ± 69.2 −44.2 ± 64.2 0.425
Can −46.3 ± 81.5 −70.0 ± 70.5 0.675
10 mm BC 2.0 ± 35.8 −179.5 ± 135.9 0.042*
LC −32.8 ± 64.7 −4.3 ± 167.4 0.758
Can 72.0 −251.0 > 0.999
15 mm BC −45.0 ± 63.6 −114.0 ± 83.4 0.667
LC 23.5 ± 33.2 −11.3 ± 105.4 > 0.999
Can 103.0 - -
Premolar 5 mm BC −119.5 ± 83.6 73.5 ± 83.2 0.007**
LC −34.8 ± 51.2 70.7 ± 74.2 0.040*
Can −71.8 ± 32.0 −106.0 ± 121.9 0.064
10 mm BC −19.8 ± 70.7 −29.7 ± 66.0 0.826
LC 3.5 ± 19.8 37.8 ± 154.4 0.676
Can −112.3 ± 63.1 −56.0 ± 24.6 0.211
15 mm BC −64.8 ± 166.2 −34.8 ± 59.5 0.746
LC −50.7 ± 99.1 −1.5 ± 58.7 0.444
Can −2.5 ± 41.7 - -
Incisal 5 mm BC −4.5 ± 130.6 −63.3 ± 60.2 0.356
LC −147.5 ± 61.7 51.7 ± 146.4 0.035*
Can −176.3 ± 88.4 −79.8 ± 154.7 0.369
10 mm BC −64.3 ± 81.4 43.8 ± 128.8 0.178
LC −57.5 ± 90.6 −14.0 ± 175.0 0.663
Can −122.3 ± 95.7 −62.3 ± 133.4 0.515
15 mm BC −99.0 ± 75.1 −17.7 ± 47.5 0.066
LC −22.0 ± 15.4 −44.3 ± 88.6 0.638
Can −12.3 ± 35.2 −54.5 ± 36.5 0.143

Values are presented as mean ± standard deviation or number only when only one measurement was possible.

Some measurements could not be obtained due to adjacent anatomic structures (i.e., third molar, maxillary sinus) or other objects (i.e., orthodontic miniscrew).

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,**p < 0.01.

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
© Korean J Orthod
Copyright © The Korean Association of Orthodontists. All Rights Reserved. / Powered by INFOrang Co., Ltd