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Comparative Study
, 20 (1), 7

Changes of Alveolar Bone Dehiscence and Fenestration After Augmented Corticotomy-Assisted Orthodontic Treatment: A CBCT Evaluation

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Comparative Study

Changes of Alveolar Bone Dehiscence and Fenestration After Augmented Corticotomy-Assisted Orthodontic Treatment: A CBCT Evaluation

Liangyan Sun et al. Prog Orthod.

Abstract

Background: To evaluate the changes of alveolar dehiscence and fenestration after augmented corticotomy-assisted orthodontic treatment on cone-beam computed tomography (CBCT) compared with traditional pre-surgical orthodontics, both quantitatively and qualitatively.

Methods: Two hundred and four anterior teeth from 17 skeletal class III malocclusions were divided into four groups. Groups G1 (upper teeth) and G3 (lower teeth), comprising 120 teeth, accepted traditional pre-surgical orthodontics; groups G2 (upper teeth) and G4(lower teeth), comprising 84 teeth, accepted augmented corticotomy-assisted pre-surgical orthodontics. The changes of alveolar bone dehiscence and fenestration of each tooth in all groups were evaluated with the help of CBCT.

Results: Quantitative analysis for comparing both groups: For the upper teeth, d1 - d0 was different between both groups while f1 - f0 was not statistically different. For the lower teeth, d1 - d0 was statistically different between both groups while f1 - f0 was not statistically different. Qualitative analysis: For the teeth that had no dehiscence before treatment, G2 and G4 had a better transition than did G1 and G3. For those having dehiscence before treatment, G4 had a better transition than did G3. For teeth having no fenestration before treatment, there was no statistically significant difference in transition between the control and treatment groups. For those having fenestration before treatment, G4 had a better transition than did G3.

Conclusions: For skeletal class III patients, augmented corticotomy-assisted orthodontic treatment is a promising method of improving alveolar bone dehiscence and fenestration for lower anterior teeth, and it also has the potential to protect both lower and upper anterior teeth against dehiscence.

Keywords: Augmented corticotomy-assisted orthodontic treatment; CBCT; Dehiscence; Fenestration.

Conflict of interest statement

Ethics approval and consent to participate

All the participants’ guardian informed consents were obtained. The present study was approved by the independent ethics committee of Shanghai Ninth People’s Hospital affiliated with Shanghai Jiao Tong University, School of Medicine (IRB number: 201592).

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Figures

Fig. 1
Fig. 1
Screening procedure of the selected samples
Fig. 2
Fig. 2
The description of the bone activation and GBR. a Performance of selective alveolar decortication. b Place bovine inorganic bone over the anterior region. c Place collagen membrane over the bone graft material)
Fig. 3
Fig. 3
Detailed procedure of locating the measurement plane of the selected tooth. The correlated planes were determined by 3 intersected guide lines with different colors representing the correlated planes, which are yellow for axial plane, green for sagittal plane, and purple for coronal plane. a Adjust the location of the axial plane by passing the yellow guideline through the CEJ of the selected tooth in both the coronal and sagittal views, then rotate the purple guideline until the intersecting line is the shortest. b Rotate the green guideline until it passes through the root apex and the midpoint of the incisal margin. c Rotate the purple guideline until it passes through the root apex and the cusp. d To ensure precise and accurate identification of anatomic structures, the largest labiolingual section displayed in the sagittal view was chosen as the measurement plane. A 10.8-mm dehiscence (left) and a 3.9-mm fenestration (right) are shown in the measurement plane
Fig. 4
Fig. 4
Reference points and measurement variables used in this study

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