Numerical simulation of hydro-mechanical coupling of periodontal ligament

Orthodontic tooth movement in the alveolar bone is due to the mechanical response of periodontal ligament to applied forces. Definition of a proper constitutive model of the periodontal ligament to investigate its response to orthodontic loading is required. For this purpose, a three-dimensional fin...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine Journal of engineering in medicine, 2020-02, Vol.234 (2), p.171-178
Main Authors: Ashrafi, Mehran, Ghalichi, Farzan, Mirzakouchaki, Behnam, Zoljanahi Oskui, Iman
Format: Article
Language:English
Subjects:
Alveolar bone
Biomechanics
Compression
Computational fluid dynamics
Computer simulation
Constitutive models
Coupling
Dental materials
Finite element method
Fluid flow
Fluid intake
Ligaments
Loading
Mathematical models
Mechanical analysis
Mechanical properties
Orthodontics
Periodontal ligament
Solid phases
Teeth
Three dimensional models
Time dependence
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Summary:Orthodontic tooth movement in the alveolar bone is due to the mechanical response of periodontal ligament to applied forces. Definition of a proper constitutive model of the periodontal ligament to investigate its response to orthodontic loading is required. For this purpose, a three-dimensional finite element model of incisor tooth, periodontal ligament, and bone was built utilizing the hydro-mechanical coupling theory. Tooth displacement in response to orthodontic loading was then investigated, and the effect of different mechanical behaviors assigned to the solid phase of the periodontal ligament was compared. Results showed that where the periodontal ligament was placed in tension, pore volume was filled with fluid intake from the bone, but fluid flow direction was from the periodontal ligament toward the bone where the periodontal ligament was placed in compression. Because of the existence of interaction between solid and fluid phases of the periodontal ligament, considering biphasic material formulation was capable to address its microscopic behavior as well as time-dependent and large deformation behaviors. This article provides beneficial biomechanical data for future dental studies in determination of optimal orthodontic force.
ISSN:0954-4119
2041-3033
DOI:10.1177/0954411919887071