Articular disk of the temporomandibular joint

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.

Articular disk of the temporomandibular joint
Sagittal section of the articulation of the mandible (articular disk visible at center)
Details
Identifiers
LatinDiscus articularis articulationis temporomandibularis
MeSHD019224
TAA03.1.07.002
FMA57059
Anatomical terminology

Its upper surface is concavo-convex from before backward, to accommodate itself to the form of the mandibular fossa and the articular tubercle.

Its under surface, in contact with the condyle, is concave.

Its circumference is connected to the articular capsule; and in front to the tendon of the Pterygoideus externus.

It is thicker at its periphery, especially behind, than at its center.

The fibers of which it 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.

Attachments of Disc:[1]

  • 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

See also

References
  1. Willard, Vincent P.; Arzi, Boaz; Athanasiou, Kyriacos A. (June 2012). "The attachments of the temporomandibular joint disc: A biochemical and histological investigation". Archives of Oral Biology. 57 (6): 599–606. doi:10.1016/j.archoralbio.2011.10.004. PMC 3294030. PMID 22129470.

This article incorporates text in the public domain from page 298 of the 20th edition of Gray's Anatomy (1918)

Further reading


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.