Which part of TMJ is vascular?
The TMJ is vascularized by the deep auricular, superficial temporal, and anterior tympanic arteries.
Is the articular disc vascular?
The articular disk of the temporomandibular joint is a thin, oval plate made of non-vascular fibrous connective tissue, which is located between the mandible’s condyloid process and the cranium’s mandibular fossa.
What artery supplies the TMJ?
The superficial temporal artery and maxillary artery run along the lateral and medial sides of the condylar neck. The temporal superficial and internal maxillary arteries supply the TMJ through the auricular root. Both of these arteries arise from the external carotid.
What are articular discs as the one in the temporomandibular joint made of?
Articular disc: The articular disc of the TMJ rests between the mandibular condyle and the mandibular fossa of the temporal bone (Fig. 13.7A). This prominent structure consists of dense fibrous connective tissue.
What is articular disc?
The articular disk is a thin, oval plate, placed between the condyle of the mandible and the mandibular fossa. It divides the joint into two cavities, each of which is furnished with a synovial membrane.
Is TMJ synovial?
The temporomandibular joint (TMJ), also known as the mandibular joint, is an ellipsoid variety of the right and left synovial joints forming a bicondylar articulation.
Which part of articular disc is avascular?
The synovial membrane lining the joint capsule produces the synovial fluid that fills these cavities. The central area of the disc is avascular and lacks innervation, thus getting its nutrients from the surrounding synovial fluid.
Can TMJ affect arteries?
The facial artery, internal maxillary artery, sphenopalatine artery, deep and posterior auricular arteries, and inferior alveolar artery are in close association with the blood and nerve supply of the TMJ complex.
What is articular disc in TMJ?
Articular disc – The articular disc is a fibrous extension of the capsule that runs between the two articular surfaces of the temporomandibular joint. The anterior disc attaches to the joint capsule and the superior head of the lateral pterygoid.
What are articular discs?
Medical Definition of articular disk : a cartilage (as the meniscus of the temporomandibular joint) interposed between two articular surfaces and partially or completely separating the joint cavity into two compartments.
What is the purpose of the articular disc?
The cartilaginous articular disc is situated between the condyle and the fossa and acts as a cushion that absorbs stress and allows the condyle to move easily when the mouth opens and closes.
Does articular cartilage produce synovial fluid?
The fluid in articular cartilage effectively serves as a synovial fluid reserve. During movement, the synovial fluid held in the cartilage is squeezed out mechanically to maintain a layer of fluid on the cartilage surface (so-called weeping lubrication).
Is the articular disc part of the temporomandibular joint?
Articular disc – The articular disc is a fibrous extension of the capsule that runs between the two articular surfaces of the temporomandibular joint. The disc articulates with the mandibular fossa of the temporal bone above and the condyle of the mandible below. The disc divides the joint into two sections, each with its own synovial membrane.
Which is the intermediate zone of the TMJ disc?
Between the two is the intermediate zone. The TMJ disc divides the joint into two compartments and separates translational and rotational motion. Above the disc, between it and the mandibular fossa and articular eminence of the temporal bone is the superior discotemporal space – anterior translation during mouth opening occurs here.
What is the articular disk of the mandible made of?
Sagittal section of the articulation of the mandible (articular disk visible at center) [edit on Wikidata] The articular disk is a thin, oval plate, which is made from fibrous connective tissue, non vascular, placed between the condyle of the mandible and the mandibular fossa.
Where does the posterior part of the TMJ attach?
The anterior disc attaches to the joint capsule and the superior head of the lateral pterygoid. The posterior portion attaches to the mandibular fossa and is referred to as the retrodiscal tissue. Retrodiscal tissue – Unlike the disc itself, the retrodiscal tissue is vascular and highly innervated.