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Biomechanical analysis for the distalisation of the mandibular dentition with anterior alveolar bone loss based on the location of an applied force: A finite element study

Australasian Orthodontic Journal
Volume 41 (2025): Issue 1 (January 2025)
By:
Open Access
|Feb 2025

Figures & Tables

Figure 1.

A, Construction of orthodontic models of mandibular anterior alveolar bone of different heights. (a) Alveolar bone not resorbed. (b) Alveolar bone absorbed by one third. (c) Alveolar bone resorbed by a half. B, Experimental conditions. Conditions 1−9: the effect of lever arm length (extended between lateral incisor and canine, conditions 1, 4 and 7: 2 mm, conditions 2, 5 and 8: 7 mm, conditions 3, 6 and 9: 12 mm, respectively).
A, Construction of orthodontic models of mandibular anterior alveolar bone of different heights. (a) Alveolar bone not resorbed. (b) Alveolar bone absorbed by one third. (c) Alveolar bone resorbed by a half. B, Experimental conditions. Conditions 1−9: the effect of lever arm length (extended between lateral incisor and canine, conditions 1, 4 and 7: 2 mm, conditions 2, 5 and 8: 7 mm, conditions 3, 6 and 9: 12 mm, respectively).

Figure 2.

Landmarks for the assessment of displacement.
Landmarks for the assessment of displacement.

Figure 3.

Total displacement trend of the lower teeth under different conditions.
Total displacement trend of the lower teeth under different conditions.

Figure 4.

Displacement of the lower tooth crown (C) and root (R) in the sagittal direction and crown (C) in the vertical direction under different working conditions (mm).
Displacement of the lower tooth crown (C) and root (R) in the sagittal direction and crown (C) in the vertical direction under different working conditions (mm).

Figure 5.

The von Mises stress distribution in the PDL under different conditions (Mpa).
The von Mises stress distribution in the PDL under different conditions (Mpa).

Materials properties

MaterialYoung’s modulus (MPa)Poisson’s ratio
Tooth2.0E + 040.3
PDL6.8E-020.45
Alveolar bone1.3E + 040.3
Bracket2.0E + 050.3
Arch wire2.0E + 050.3
DOI: https://doi.org/10.2478/aoj-2024-0031 | Journal eISSN: 2207-7480 | Journal ISSN: 2207-7472
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Language: English
Page range: 8 - 17
Submitted on: Jun 1, 2024
Accepted on: Dec 1, 2024
Published on: Feb 5, 2025
Published by: Australian Society of Orthodontists Inc.
In partnership with: Paradigm Publishing Services
Publication frequency: 1 times per year
Related subjects:
Medicine,
Basic medical science,
Basic medical science, other

© 2025 Jing Yang, Qianqian Zhang, Dehua Zheng, Fengchun Hou, published by Australian Society of Orthodontists Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

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