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ID 115888
Author
Barrientos, Eva University of Oviedo
Pelayo, Fernández University of Oviedo
Lamela-Rey, María Jesús University of Oviedo
Fernández-Canteli, Alfonso University of Oviedo
de Vicente, Juan Carlos University of Oviedo
Keywords
Temporomandibular joint
Parafunction
Prolonged clenching
Finite element analysis
Viscoelastic behaviour
Stress analysis
Content Type
Journal Article
Description
Parafunctional habits, such as bruxism and prolonged clenching, have been associated with dysfunctional hyperactivity of the masticatory muscles, including the lateral pterygoid muscle. The resultant loading to the temporomandibular joint (TMJ) is subject to the degradation of bone, cartilage and disc in the TMJ. In this study, we examined the effect of clenching direction on the stress distribution in the TMJ. In this line, we hypothesised that asymmetrical clenching involved in parafunction might result in increased stresses on the TMJ disc as well as on the condylar and temporal articular surfaces.
The distribution of stress for various directional loadings was analysed using a three-dimensional finite element model of the TMJ, with viscoelastic properties for the disc. The numerical results revealed that load direction influenced the amount and distribution of stresses on the disc surfaces. In particular, the lateral region of the disc suffered higher stress values. Moreover, the results showed a significant stress relaxation in the disc that revealed its capacity for stress energy dissipation.
From the present study, it can be established that during prolonged clenching, the higher stresses are concentrated in the lateral region, which could imply that TMJ disorders related to damage or wear in the disc and the condylar cartilage, overall, occur when lateral dysfunctional displacements are present.
Journal Title
Journal of the Mechanical Behavior of Biomedical Materials
ISSN
17516161
NCID
AA12344261
Publisher
Elsevier
Volume
112
Start Page
104029
Published Date
2020-08-11
Remark
論文本文は2022-08-11以降公開予定
Rights
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
language
eng
TextVersion
その他
departments
Oral Sciences