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Le disque articulaire temporomandibulaire … Le disque articulaire temporomandibulaire (ou ménisque interarticulaire temporomandibulaire) est une fine lame fibrocartilagineuse non vascularisé, située entre le processus condylien de la mandibule et la fosse mandibulaire. Sa face supérieure est concavo-convexe d'avant en arrière, pour s'adapter à la forme de la fosse mandibulaire et du tubercule articulaire. Sa face inférieure, au contact du condyle, est concave. Sa circonférence est reliée à la capsule articulaire, et en avant au tendon du muscle ptérygoïdien latéral. Il est plus épais à sa périphérie, surtout en arrière, qu'en son centre. Les fibres ont une disposition concentrique, plus apparente à la circonférence qu'au centre. Il divise l'articulation en deux cavités, dont chacune est munie d'une membrane synoviale. Les points d'attache du disque sont :
* pour la partie antérieure du disque en bas le condyle antérieur et en haut à le tubercule articulaire ;
* pour la partie postérieure du disque en bas le condyle postérieur et en haut l'os temporal ;
* pour les bords latéral et médial,la capsule articulaire. Le disque empêche la mandibule de se déplacer vers l'arrière.a mandibule de se déplacer vers l'arrière.
, The articular disk of the temporomandibula … The articular disk of the temporomandibular joint is a thin, oval plate made of non-vascular fibrous connective tissue located between the mandible's condyloid process and the cranium's mandibular fossa. Its upper surface is concavo-convex from before backward, to accommodate itself to the form of the mandibular fossa and the articular tubercle. Its lower surface, in contact with the condyle, is concave. Its circumference is connected to the articular capsule, and in front to the tendon of the lateral pterygoid muscle. It is thicker at its periphery, especially behind, than at its center. The fibers of which the disc is composed have a concentric arrangement, more apparent at the circumference than at the center. It divides the joint into two cavities, each of which is furnished with a synovial membrane. It is attached as follows.
* The anterior portion of the disc attaches inferiorly to the anterior condyle and superiorly to the eminence by bending with the joint capsule.
* Posteriorly, the disc attaches superiorly to the temporal bone and inferiorly to the posterior condyle (the posterior attachments are frequently called the bilaminar zone).
* Laterally and medially, the disc attachments blend into the joint capsule near its attachment to the condylar head. The disc prevents the mandible from moving posteriorly.ents the mandible from moving posteriorly.
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Discus articularis articulationis temporomandibularis
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Sagittal section of the articulation of the mandible
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rdfs:comment |
The articular disk of the temporomandibula … The articular disk of the temporomandibular joint is a thin, oval plate made of non-vascular fibrous connective tissue located between the mandible's condyloid process and the cranium's mandibular fossa. Its upper surface is concavo-convex from before backward, to accommodate itself to the form of the mandibular fossa and the articular tubercle. Its lower surface, in contact with the condyle, is concave. Its circumference is connected to the articular capsule, and in front to the tendon of the lateral pterygoid muscle. It is thicker at its periphery, especially behind, than at its center.ry, especially behind, than at its center.
, Le disque articulaire temporomandibulaire … Le disque articulaire temporomandibulaire (ou ménisque interarticulaire temporomandibulaire) est une fine lame fibrocartilagineuse non vascularisé, située entre le processus condylien de la mandibule et la fosse mandibulaire. Sa face supérieure est concavo-convexe d'avant en arrière, pour s'adapter à la forme de la fosse mandibulaire et du tubercule articulaire. Sa face inférieure, au contact du condyle, est concave. Sa circonférence est reliée à la capsule articulaire, et en avant au tendon du muscle ptérygoïdien latéral. Il est plus épais à sa périphérie, surtout en arrière, qu'en son centre.rie, surtout en arrière, qu'en son centre.
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rdfs:label |
Disque articulaire temporomandibulaire
, Articular disk of the temporomandibular joint
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