Chapter 5 Temporomandibular Joint

The joint disc is both _____ (having no nervous tissues) and _____ (having no blood vessels) in its thinner middle or force-bearing intermediate bone

Aneural Avascular

The _______ ______ consists of a rounded protuberance on the inferior aspect of the zygomatic process

Articular eminence

This fossa consists of an oval shaped depression on the temporal bone

Articular fossa

An area where the bones are joined to each other

Articulation

The TMJ has its sensory innervation by the ________ and _______ branches of the mandibular nerve (or 3rd division) of the 5th cranial or trigeminal nerve

Auriculotemporal and masseteric

The articulating area on the temporal bone of the joint is located on the bone's _____ aspect, involving the _____ part

Inferior Squamous

The joint disc completely divides the TMJ into two compartments or ____ _____

Synovial Fluid

A cleat viscous liquid, rather like egg white

Synovial fluid

The fibrous joint disc is located between the ... and .... on each side

Temporal bone and mandibular condyle

With aging or trauma to the joint disc area, it can become _____ or even _____

Thinner Perforated

How many paired ligaments are associated with the TMJ?

Three

The temporomandibular, stylomandibular, and sphenomandibular ligaments

Three paired ligaments with the TMJ

True or False: Most symptoms of TMD seem to originate from the muscles supporting the joint

True

There are ____ and ____ synovial cavities

Upper and lower

Protrusion of the mandible

bringing forward of the lower jaw

A fibrous ____ ____ completely encloses the TMJ

joint capsule

lateral deviation of the mandible

shifting of the lower jaw to one side

subluxation

Acute episode in which both joints become disclosed

Ligament

Band of fibrous tissue and connecting bones

Retraction of the mandible

Bringing backward of lower jaw

The blood supply to the joint is from branches of the external ______ artery, predominantly the superficial temporal branch

Carotid

The temporal bone is a _____ bone that articulates with the _____ bone of the mandible at the TMJ by way of the _____

Cranial Facial Joint disc

temporomandibular disorder (TMJ)

Disorder involving one or both temporomandibular joints

This articulating area includes the temporal bone's articular _____ and articular _____

Eminence Fossa

The mandible is a _____ bone that articulates with the _____ bone of the cranium

Facial Temporal

True or False: The testing position of the TMJ is with the teeth biting together?

False

Both articulating bony surfaces of the joint are covered by ______

Fibrocartilage

Denotes a joint having the form of both ginglymus and arthrodia joints, or hinge and sliding joints

Ginglymoarthrodial Joint

The TMJ is classified as a ____ joint

Ginglymoarthroid Joint

Two basic types of movement performed by the TMJ joint and its associates muscles: ____ (or sliding) and _____ (or hinge) movements

Gliding and rotational

The joint disc is attached to the ___ and ____ poles of the mandibular condyle

Lateral and medial

Lateral deviation is also called

Lateral excursion

The mandible is joined to the cranium by _____ of the TMJ

Ligaments

depression of mandible

Lowering of lower jaw

The articular fossa is also known as the

Mandibular Fossa or Glenoid Fossa

The TMJ is a joint on each side of the head that allows for movement of the mandible for ____, _____, and _____

Mastication, speech, and respirations

A fibrous joint disc is also called

Meniscus

Also the Sphenomandibular Ligament is not part of the TMJ, it becomes accentuated and taut when the mandible is ____

Protruded

elevation of mandible

Raising of lower jaw

Trismus

Reduced opening of the jaws

This ligament is not strictly considered part of the TMJ but is located on the medial side of the mandible, at some distance from the joint

Sphenomandibular Joint

This ligament is a vestige of Meckel cartilage, which is part of the embryonic lower jaw

Sphenomandibular Ligament

The temporomandibular Ligament is considered the major ligament for the joint since it provides the _____ to the joint

Strength

A variable ligament formed from thickened cervical fascia in the area

Stylomandibular ligament

This ligament runs from the styloid process of the temporal bone to the angle of the mandible

Stylomandibular ligament

The lymph from the TMJ is drained deeply into the.....

Superior deep cervical nodes

venous return

The _____ _____ is by the superficial temporal, maxillary, and pterygoid plexus of veins

joint

site of a junction or union between two or more bones