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CLC number: R783.5

On-line Access: 2011-11-30

Received: 2011-01-09

Revision Accepted: 2011-08-27

Crosschecked: 2011-11-10

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Journal of Zhejiang University SCIENCE B 2011 Vol.12 No.12 P.990-997

http://doi.org/10.1631/jzus.B1100013


Three-dimensional evaluation of upper anterior alveolar bone dehiscence after incisor retraction and intrusion in adult patients with bimaxillary protrusion malocclusion


Author(s):  Qing-yuan Guo, Shi-jie Zhang, Hong Liu, Chun-ling Wang, Fu-lan Wei, Tao Lv, Na-na Wang, Dong-xu Liu

Affiliation(s):  Department of Orthodontics, Shandong Provincial Key Laboratory of Oral Biomedicine, Shandong University, Jinan 250012, China, Department of Stomatology, the Second Hospital of Shandong University, Jinan 250033, China

Corresponding email(s):   liudongxu@sdu.edu.cn

Key Words:  Alveolar bone loss, Adult patients, Computed tomography, Three-dimensional registration


Qing-yuan Guo, Shi-jie Zhang, Hong Liu, Chun-ling Wang, Fu-lan Wei, Tao Lv, Na-na Wang, Dong-xu Liu. Three-dimensional evaluation of upper anterior alveolar bone dehiscence after incisor retraction and intrusion in adult patients with bimaxillary protrusion malocclusion[J]. Journal of Zhejiang University Science B, 2011, 12(12): 990-997.

@article{title="Three-dimensional evaluation of upper anterior alveolar bone dehiscence after incisor retraction and intrusion in adult patients with bimaxillary protrusion malocclusion",
author="Qing-yuan Guo, Shi-jie Zhang, Hong Liu, Chun-ling Wang, Fu-lan Wei, Tao Lv, Na-na Wang, Dong-xu Liu",
journal="Journal of Zhejiang University Science B",
volume="12",
number="12",
pages="990-997",
year="2011",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B1100013"
}

%0 Journal Article
%T Three-dimensional evaluation of upper anterior alveolar bone dehiscence after incisor retraction and intrusion in adult patients with bimaxillary protrusion malocclusion
%A Qing-yuan Guo
%A Shi-jie Zhang
%A Hong Liu
%A Chun-ling Wang
%A Fu-lan Wei
%A Tao Lv
%A Na-na Wang
%A Dong-xu Liu
%J Journal of Zhejiang University SCIENCE B
%V 12
%N 12
%P 990-997
%@ 1673-1581
%D 2011
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1100013

TY - JOUR
T1 - Three-dimensional evaluation of upper anterior alveolar bone dehiscence after incisor retraction and intrusion in adult patients with bimaxillary protrusion malocclusion
A1 - Qing-yuan Guo
A1 - Shi-jie Zhang
A1 - Hong Liu
A1 - Chun-ling Wang
A1 - Fu-lan Wei
A1 - Tao Lv
A1 - Na-na Wang
A1 - Dong-xu Liu
J0 - Journal of Zhejiang University Science B
VL - 12
IS - 12
SP - 990
EP - 997
%@ 1673-1581
Y1 - 2011
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1100013


Abstract: 
Objective: The purpose of this study was to evaluate three-dimensional (3D) dehiscence of upper anterior alveolar bone during incisor retraction and intrusion in adult patients with maximum anchorage. Methods: Twenty adult patients with bimaxillary dentoalveolar protrusion had the four first premolars extracted. Miniscrews were placed to provide maximum anchorage for upper incisor retraction and intrusion. A computed tomography (CT) scan was performed after placement of the miniscrews and treatment. The 3D reconstructions of pre- and post-CT data were used to assess the dehiscence of upper anterior alveolar bone. Results: The amounts of upper incisor retraction at the edge and apex were (7.64±1.68) and (3.91±2.10) mm, respectively, and (1.34±0.74) mm of upper central incisor intrusion. Upper alveolar bone height losses at labial alveolar ridge crest (LAC) and palatal alveolar ridge crest (PAC) were 0.543 and 2.612 mm, respectively, and the percentages were (6.49±3.54)% and (27.42±9.77)%, respectively. The shape deformations of LAC-labial cortex bending point (LBP) and PAC-palatal cortex bending point (PBP) were (15.37±5.20)° and (6.43±3.27)°, respectively. Conclusions: Thus, for adult patients with bimaxillary protrusion, mechanobiological response of anterior alveolus should be taken into account during incisor retraction and intrusion. Pursuit of maximum anchorage might lead to upper anterior alveolar bone loss.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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