Three-dimensional finite element analysis of human temporomandibular joint with and without disc displacement during jaw opening.
Med Eng Phys
; 26(6): 503-11, 2004 Jul.
Article
en En
| MEDLINE
| ID: mdl-15234686
The aim of this study was to evaluate the differences of stress distribution in the temporomandibular joint (TMJ) disc during jaw opening between the subjects with and without internal derangement of TMJ (TMJ-ID). Three symptom-free volunteers and three symptomatic patients with anterior disc displacement were selected as normal and TMJ-ID subjects, respectively. For each subject, magnetic resonance images (MRI) were taken in the axial, sagittal and coronal directions. Using MRI taken, six three-dimensional finite element models of TMJ were developed. For each subject, the condylar movements during jaw opening were recorded and used as the loading condition for stress analysis. By comparing the calculated disc displacement to the measured one from MRI, the frictional coefficients were mu = 0.001 for the normal subjects, but mu = 0.01-0.001 for the TMJ-ID subjects. For the normal subjects, relatively high stresses were found at the anterior and lateral portions of the disc throughout jaw opening. In the connective tissues, the stress level was higher in the TMJ-ID than in the normal subjects. It is suggested that the disc displacement induces the change of stress distribution in the disc and the increase of frictional coefficients between articular surfaces, resulting in the secondary tissue damage.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Articulación Temporomandibular
/
Interpretación de Imagen Asistida por Computador
/
Disco de la Articulación Temporomandibular
/
Luxaciones Articulares
/
Modelos Biológicos
/
Movimiento
Tipo de estudio:
Clinical_trials
/
Diagnostic_studies
/
Prognostic_studies
Límite:
Adult
/
Female
/
Humans
/
Middle aged
Idioma:
En
Revista:
Med Eng Phys
Asunto de la revista:
BIOFISICA
/
ENGENHARIA BIOMEDICA
Año:
2004
Tipo del documento:
Article
País de afiliación:
Japón
Pais de publicación:
Reino Unido