The influence of maxillary incisor angles on the stress distributions of temporomandibular joints under incisal biting

Background and Objective The incisal biting was one of the most regular jaw activities. The direction of bite force on the incisor tip and the mandible position were relevant to the incisor angle as biting. This study was carried out to explore the influence on the temporomandibular joint (TMJ) caus...

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Bibliographic Details
Published in:International journal for numerical methods in biomedical engineering 2023-06, Vol.39 (6), p.e3702-n/a
Main Authors: Li, Annan, Shao, Bingmei, Chong, Desmond Y. R., Liu, Zhan
Format: Article
Language:English
Subjects:
Biting
Computed tomography
Cone-Beam Computed Tomography - methods
Finite Element Analysis
finite element analysis (FEA)
Finite element method
Humans
incisal biting
Incisor - diagnostic imaging
Incisor - pathology
incisor angles
Jaw
Magnetic resonance imaging
Mandible
Mandible - pathology
Mathematical models
Maxilla
Maxilla - diagnostic imaging
Maxilla - pathology
maxillary incisor
Stress
Stresses
Temporal bone
Temporomandibular joint
temporomandibular joint (TMJ)
Temporomandibular Joint - diagnostic imaging
Three dimensional models
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Summary:Background and Objective The incisal biting was one of the most regular jaw activities. The direction of bite force on the incisor tip and the mandible position were relevant to the incisor angle as biting. This study was carried out to explore the influence on the temporomandibular joint (TMJ) caused by the incisor angle. Methods Twenty individuals belonging to three incisor subtypes of the buccal type were recruited. In addition, the 3D models including the maxillary, mandible and discs were established based on their cone‐beam computed tomography and magnetic resonance imaging scannings. Then, the mandibular ligaments and the discal attachments were simulated in the finite element models to analyze the stress distributions of the TMJs under incisal biting. Results The TMJ stresses of subtype I showed normal range and distribution. The stresses of the intermediate temporal bone tended to increase in subtype II. The intermediate and posterior bands of the discs sustained greater tensile stresses in subtype III. Conclusions Abnormal stress distributions are harmful to TMJs, so the incisor cusp was not suggested to incline to the palatal side too much.
ISSN:2040-7939
2040-7947
DOI:10.1002/cnm.3702