TMJ Flashcards

1
Q

why is it called the temporomandibular joint?

A

because it is the junction of temporal and mandible

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2
Q

3 TMJ function

A
  1. speech
  2. masitcation
  3. Deglutition-swallowing
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3
Q

TMJ innervated by what cranial nerve?

A

V3

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4
Q

Blood supply comes from?

A

branches of external carotid

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5
Q

Anatomy of TMJ:

Temporal bone, Fibrocartilage, and Enclosed characterisitics

A

Temporal-articulating surfaces include the articular eminence and glenoid fossa
Fibrocartilage-for articulating surface
Enclosed-in fibrous joint capsule

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6
Q

two synovial cavities found within the joint disc

A

-meniscus creates superior and inferior compartments

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7
Q

what does the synovial fluid secreted by membranes act as

A

acts as a lubricant for condyle

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8
Q

pathology of joint disc

A

-if there is problems such as:
-pain on function
-limiting function
-stuck on opening
then there is something wrong

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9
Q

what muscles allow the mandible to move?

A
  • masster: hyperstrophy, tenderness, and atrophy
  • temporalis
  • medial pterygoid
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10
Q

what are the two disc compartment motions

A
  1. temporodiscal: superior compartment, and motion is translatory
  2. condylodiscal: inferior compartment, and motion is rotational
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11
Q

what order does the disc compartments work?

A
  1. to open the mandible is rotational
  2. to open the mandible wider is translatory
  3. to close the mandible is translatory
  4. to close the mandible all the way is rotational
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12
Q

function of ligaments

A

to create an envelope of movement

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13
Q

3 joint ligaments used

A
  1. tempromandibular which prevents excessive retraction
  2. sphenomandibular which prevents excessive protrusion
  3. stylomandibular which prevents excessive protrusion
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14
Q

Protrusion movement and muscles used

A

movement: both compartments gliding
muscles: bilateral L. pyterygoids (inferior heads)

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15
Q

Retraction movement and muscles used

A

movement: both compartments gliding
muscles: bilateral posterior temporalis

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16
Q

Elevation movement and muscles used

A

movement: gliding both superior and rotation of both inferior compartments
muscles: temporalis, M. Ptyerygoid, and masseter

17
Q

Depression movement and muscles used

A

movement: same as elevation which is gliding of both superior and rotation of both inferior compartments
muscles: inferior head of L. Ptyerygoid and suprahyoid bilaterally

18
Q

Lateral deviation movement and muscles used

A

movement: gliding one superior cavity and rotation of opposite superior cavity
muscles: Unilateral L. Ptyergoid

19
Q

TMJ disorders

A
  1. clenching-holding teeth together
  2. bruxism-clenching with grinding
  3. trauma
  4. subluxation-dislocation of joint-condyle ahead of articular surface