The structure indicated is the temporomandibular joint
The temporomandibular joint
is commonly referred to as the TMJ
and is a synovial joint
formed between the condyles
of the mandible
and the articular fossa
and articular tubercle
of the temporal bones
of the skull.
The articular surfaces of the temporomandibular joint are covered with fibrocartilage
, and the joint is divided into two parts
by the presence of a fibrous articular disc
Temporomandibular joint dysfunction (TMJD)
- The inferior part of the TMJ allows depression and elevation.
- The superior part of the TMJ allows protrusion and retraction.
is an umbrella term which covers several problems relating to the temporomandibular joint, most often involving pain and dysfunctional movement at the TMJ. Many problems can be linked to displacement of the articular disc, degenerative changes (such as osteoarthritis and rheumatoid arthritis) in the TMJ and problems with the muscles of the mastication.
To learn more about the anatomy of the mandible, click here
To learn more about the anatomy of the bones of the skull, click here
To learn about the anatomy of the muscles of mastication, click here