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Dental Tissues > TMJ > Flashcards

TMJ Flashcards

1
Q

Aka TMJ

A

Temporomandibular Joint

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2
Q

A joint on each side of the head that allows for movement of the mandible for mastication, speech, and respiratory movements

A

TMJ

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3
Q

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

A

mastication, speech, and respiratory movements

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4
Q

Most complex set of joints in the body

A

TMJ

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5
Q

The TMJ is the articulation of the

A

temporal bone and the mandible

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6
Q

The articulating area of the TMJ is located on the

A

inferior aspect of the temporal bone

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7
Q

• The articulating area of the TMJ is located on the inferior aspect of the temporal bone
• The articulating area includes____

A

the articular eminence and the articular fossa of the temporal bone

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8
Q

What is the articular eminence or tubercle?

A

a smooth-surfaced rounded protuberance on the inferior aspect of the zygomatic process and is positioned anterior to the articular fossa

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9
Q

What is the articular fossa?

A

posterior to the articular eminence; it is a depression on the inferior aspect of the temporal bone; it is also posterior and medial to the zygomatic arch.

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10
Q

Posterior to the articular fossa is a sharper ridge, called the

A

the postglenoid process or postglenoid tubercle

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11
Q

The mandible articulates with each temporal bone at the

A

head of each mandibular condyle

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12
Q

The growth center for the mandible is located in

A

the head of each mandibular condyle

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13
Q

This is considered to be the last growth center of bone in the body, meaning it continues to grow later in life compared to most other bones

A

growth center for the mandible at the head of the mandibular condyle

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14
Q

The TMJ is what type of joint?

A

The TMJ is a synovial joint

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15
Q

The TMJ is a synovial joint. It is a _____with a ______ and is lined by a

A

It is a freely movable joint with a joint capsule and is lined by a synovial membrane

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16
Q

What is a Joint capsule?

A

a thin, fibrous capsule that surrounds the joint

17
Q

The synovial membrane of the joint capsule of the TMJ secretes____ allowing for smooth movement between the articulating bones of the jaw and the skull

A

synovial fluid,

18
Q

Synovial fluid allows for

A

smooth movement between the articulating bones of the jaw and the skull

19
Q

What is synovial fluid?

A

Synovial fluid is a thick substance that fills the TMJ, lubricating it

20
Q

The mandible is joined to the cranium by

A

ligaments of the TMJ

21
Q

A ligament is a

A

band of fibrous tissue that connects bones

22
Q

There are how many ligaments associated with the TMJ?

A

three paired ligaments

23
Q

What the three paired ligaments associated with the TMJ?

A

Temporomandibular ligament

Stylomandibular ligament

Sphenomandibular ligament

24
Q

What is located on each side between the temporal bone and the condyle of the mandible

A

A joint disk

25
Q

The joint disc divides the TMJ into___

A

two compartments

26
Q

The joint disc divides the TMJ into two compartments. These two compartments are

A

the upper and lower synovial cavities

27
Q

Two basic types of movement of the mandible are performed by the TMJ (with the help of the muscles of mastication). What are the two movements

A

Gliding and rotational

28
Q

Gliding movement occurs mainly between the

A

disc and the articular eminence of the temporal bone in the upper synovial cavity

29
Q

Gliding movement allows the lower jaw to

A

move forward and backward (protrusion and retraction of the mandible)

30
Q

Rotational movement occurs mainly between the

A

disc and the mandibular condyle in the lower synovial cavity

31
Q

Rotational movement allows the jaw to

A

raise and lower (elevation and depression of the mandible)

32
Q

Lateral deviation of the mandible involves

A

both gliding and rotational movements

33
Q

What is TMD?

A

TMD - Temporomandibular disorder. Patients may present with a disorder associated with one or both of their
TMJs

34
Q

Patients with TMD may experience

A

Chronic joint tenderness

Swelling

Painful muscle spasms

Headaches

Difficulty opening/closing/deviating their jaw

35
Q

How do we examine the TMJ?

A

palpating just anterior to each ear feeling for the articulation of the temporal bone and the mandible on each side of the head

36
Q

___aid in diagnosis of TMD

A

Radiographs and CBCT

37
Q

An acute episode of TMD can occur when a patient

A

opens too wide, causing subluxation and trismus

38
Q

What is Subluxation?

A

partial dislocation. The head of the condyle moves too far anteriorly past the articular eminence

39
Q

What is Trismus?

A

inability to normally open the mouth

Dental Tissues (20 decks)

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