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SP14 Occlusion > Q3-TMJ > Flashcards

Q3-TMJ Flashcards

1
Q

What do ginglymoid and arthodial mean in terms of the TMJ

A

ginglymoid - hinge

arthodial - glide

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2
Q

The TMJ contains what three components

A

mandibular condyle
articular (glenoid) fossa and eminence
articular disc

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3
Q

What is the name of the fossa that the TMJ is located in

A

temporal fossa

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4
Q

What is the name of the fossa that lies deep to TMJ and can be seen after the zygomatic arch is removed

A

infratemporal fossa

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5
Q

What nerve lies deep to the infra temporal fossa in the pterygomaxillary suture

A

maxillary nerve

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6
Q

The mandible condyle has a greater (mediolateral or anteroposterior) dimension

A

mediolateral

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7
Q

The articular fossa is the (nonfunctioning/functioning) portion

A

nonfunctioning

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8
Q

The articular eminence is the (nonfunctioning/functioning) portion

A

functioning

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9
Q

The articular disc is made up of what?

A

fibrous connective tissue

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10
Q

True or False

The articular disc is not vascularized

A

False; the articular disc is highly vascularized everywhere but the center

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11
Q

True or False

The ligaments of TMJ assist in moving the joint

A

False; they do not move the joint, they offer support and limit movement

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12
Q

What are the 4 ligaments of the TMJ

A

fibrous capsule (capsular ligament)
lateral ligament
stylomandibular ligament
sphenomandibular ligament

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13
Q

The synovial membrane is located within which ligament

A

fibrous capsule; it produces synovial fluid

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14
Q

Which ligament is likened to a shower curtain surrounding the condyle and mandibular fossa

A

fibrous capsule (capsular ligament)

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15
Q

This ligament prevents excessive rotation and opening

A

lateral ligament

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16
Q

This ligament has two sets of fibers; OOP (outer oblique portion) and IHP (inner horizontal portion)

A

lateral ligament

OOP limits lateral rotation and gliding

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17
Q

This ligament prevents excessive protrusion

A

stylomandibular ligament

18
Q

This ligament prevents excessive opening

A

sphenomandibular ligament

19
Q

What are the four muscles involved in mastication

A

temporalis
masseter
medial pterygoid
lateral pterygoid

20
Q

This muscle originates at the zygomatic arch (inf. and medial) and inserts on the lateral surface of rami and angle of the mandible

A

masseter

21
Q

This is the strongest muscle of mastication

A

masseter

22
Q

This muscle elevates and retrudes the mandible

A

temporalis

23
Q

This muscle elevates (closes) the mandible

A

masseter

24
Q

This muscle originates in the temporal fossa and inserts on the coronoid process, anterior border of ramus, and the temporal crest

A

temporalis

25
Q

This muscle works to elevate the mandible and close the teeth together

A

medial pterygoid

26
Q

This muscle originates at the pterygoid fossa and inserts on the medial angle of the mandible

A

medial pterygoid

27
Q

This muscle moves the mandible laterally and paired with the other, protrudes and depresses the mandible

A

lateral pterygoid

28
Q

This muscle originates on the lateral pterygoid plate and greater wing and inserts on the pterygoid fovea and anterior part of the articular disc

A

lateral pterygoid

29
Q

What other muscles assist the lateral pterygoid in depressing the mandible?

A

suprahyoids (geniohyoid, mylohyoid, digastrics)

intrahyoids (omohyoid, sternohyoid)

30
Q

These muscles elevate the hyoid which contributes to swallowing

A

digastrics

31
Q

What other factors affect position and movement of the mandible besides the muscles of mastication (3)

A

ligaments
fascia
muscles of facial expression

32
Q

These muscle(s) control retrusion of the mandible

A

temporalis

suprahyoids

33
Q

These muscle(s) control depression of the mandible

A

both lateral pterygoids

supra- and infra-hyoids

34
Q

These muscle(s) control elevation of the mandible

A

masseter
medial pterygoids
temporalis (anterior, vertical, and middle fibers)

35
Q

These muscle(s) control protrusion of the mandible

A

both lateral pterygoids
masseter
medial pterygoid

36
Q

These muscle(s) control lateral excursion of the mandible

A

right lateral pterygoid moves mandible left and vice versa

37
Q

What nerve innervate the muscles of mastication

A

mandibular branch of CN V

38
Q

What nerve(s) innervate the TMJ

A

auriculotemporal
masseteric
deep temporal

39
Q

What arteries irrigate the TMJ

A

superficial temporal
middle meningeal
internal maxillary

40
Q

True or False

The ligaments can stretch

A

False; the ligaments CANNOT stretch; if too much force is applied they elongate and will not be able to return to normal is elongated for too long of a time

41
Q

True or False

The articular surfaces of the TMJ must be maintained in contact (via capsular ligaments and elevator muscles)

A

True

SP14 Occlusion (9 decks)

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