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head and neck anatomy > chapter 5 tempromandibular joint > Flashcards

chapter 5 tempromandibular joint Flashcards

1
Q

tmj is classified as a

A

ginglymoarthrodial joint

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2
Q

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

A

ginglymoarthrodial joint

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3
Q

tmj is innervated by the

A

auriculotemporal and masseteric branches of mandibular nerve(or third division) of 5th cranial nerve or trigeminal nerve

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4
Q

tmj motor function by

A

muscles of mastication

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5
Q

area where the bones are joined to each other

A

articulation

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6
Q

lower of lower jaw

A

depression of mandible

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7
Q

raising of lower jaw

A

elevation of mandible

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8
Q

site of a junction of union between two or more bones

A

joint

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9
Q

shifting of the lower jaw to one side

A

lateral deviation of mandible

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10
Q

band of fibrous tissue connecting bones

A

ligament

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11
Q

type of body tissue that shortens under nerual control, causing soft tissue and bony structures to move

A

muscle

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12
Q

bringing forward of the lower jaw

A

protrusion of mandible

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13
Q

bringing backward of lower jaw

A

retraction or retrusion of mandible

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14
Q

acute episode in which both joints become dislocated, often due to excessive mandibular protrusion and depression

A

sublaxation

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15
Q

disorder involving one or both temporomandibular joiints

A

TMD

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16
Q

inability to normally open the mouth

A

trismus

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17
Q

forms upper and lower joint space or synovial cavities, avascular except posterior portion, poor healing, superior head of lateral pterygoid attaches to it medially

A

disc(meniscus) biconcave cartilage

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18
Q

enclosed the joint and spaces

A

joint capsule

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19
Q

3 ligaments of the joint

A

temporomandibular, stylomandibular, sphenomandibular

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20
Q

major support ligament, joint capsule blends with ligament on anterior lateral surface

A

temporomandibular ligament

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21
Q

attachments of temporomandibular ligament

A

zygomatic process of temporal bone, lateral surface of condylar neck

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22
Q

attachments for stylomandibular ligament

A

styloid process, medial angle of mandible

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23
Q

sphenomandibular ligament attachments

A

sphenoid bone and lingula; inferior alveolar nerve passes between ligament and mandible

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24
Q

the only gliding and rotating joint in the body

A

tmj

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25
Q

opening of tmj in multiple planes

A

opening and closing, protrusion and retrusion, lateral excursion/deviation

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26
Q

this movement occurs 1st, mandible rotates against disc, first 20 mm of mandibular opening

A

rotational movement

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27
Q

this movement occurs 2nd

A

gliding movement

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28
Q

mandible and disc glide down articular eminence, allows for remaining open

A

gliding movement

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29
Q

maximum opening

A

50-60mm

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30
Q

normal opening

A

anything 40mm or above

31
Q

opening is a combination of

A

depression and protrusion of mandible

32
Q

opening muscles

A

lateral pterygoids and suprahyoid

33
Q

closing muscles

A

temporalis, masseter, medial pterygoid

34
Q

closing is what movements(combination of)

A

elevation and retraction of mandible

35
Q

what 2 movements occur throughout speech and mastication

A

lateral deviation and protrusion

36
Q

ipsilateral condyle rotates, contralateral condyle moves forward and down eminence, contralateral lateral pterygoid muscle causes movement

A

lateral movement

37
Q

example of left lateral movement:

A
  1. left(ipsilateral) condyle rotates
  2. right(contralateral) condyle moves forward and down eminence
  3. right(contralateral) lateral pterygoid muscles causes movement
38
Q

involves translation or gliding of both joints down articular eminence

A

protrusive movements

39
Q

muscles of protrusive movements

A

bilateral contraction of lateral pterygoids

40
Q

muscles of retrusion

A

temporalis muscle

41
Q

does mandible move up or down to eat?

A

no

42
Q

do teeth touch when resting?

A

no

43
Q

resting space/freeway space

A

2-4mm of space between teeth resting

44
Q

loss of teeth does what to freeway space?

A

alters freeway space

45
Q

the stylomandibular ligament separates

A

parotid and submandibular salivary gland

46
Q

two basic types of movement for tmj

A

gliding(sliding) and rotational(or hinge)

47
Q

movement occurs mainly between the disc and the mandibular condyle in the lower synovial cavity

A

rotation

48
Q

occurs mainly between the articular eminence of temporal bone in the upper synovial cavity, with the disc plus the condyle moving forward or backward, and down and up articular eminence

A

gliding(sliding)

49
Q

gliding movement involves

A

protrusion or retraction of mandible

50
Q

movements accomplished with rotation

A

depression or elevation of mandible

51
Q

during mastication what movement

A

laterally deviated position back to the midline

52
Q

muscles involved with depressing mandible

A

anterior suprahyoid muscles

53
Q

protrusion of mandible, moving mandible forward movement and muscles

A

gliding in both upper synovial cavities; lateral pterygoids with bilateral contraction

54
Q

retraction of mandible, moving it backwards

movement and muscles

A

gliding in both upper synovial cavities; posterior part of temporalis and suprahyoid with bilateral contraction

55
Q

elevation and retraction of mandible, closing jaws

movement and muscles

A

gliding in both upper synovial cavities and rotation in both lower synovial cavities; masseter, temporalis, medial pterygoid with bilateral contraction

56
Q

depression and protrusion of mandible, opening jaws

A

gliding in both upper synovial cavities and rotation in both lower synovial cavities; suprahyoid and lateral pterygoids with bilateral contraction

57
Q

lateral deviation of mandible to shift mandible to contralateral side

A

gliding in one upper synovial cavity and while the condyle and disc of other side spin around an approximately vertical axis within upper synovial cavity; lateral pterygoid with unilateral contraction

58
Q

contact between teeth; relationship between the maxillary and mandibular teeth when they approach each other, as occurs during chewing or at rest

A

occlusion

59
Q

the mesiobuccal cusp of the upper first molar occludes with the buccal groove of the lower first molar

A

normal occlusion

60
Q

same as normal occlusion but characterized by crowding, rotations, and other positional irregularities

A

class 1 malocclusion

61
Q

the mesiobuccal cusp of the upper first molar occludes anterior to the buccal groove of the lower first molar “overbite”. two subclasses

A

class 2 malocclusion

62
Q

the mesiobuccal cusp of the upper first molar occludes posterior to the buccal groove of the lower first molar “underbite”

A

class 3 malocclusion

63
Q

the relation of the mandible to the maxilla when the condyles are in the most superior and posterior position in the fossa

A

centric relation

64
Q

the occlusion of opposing teeth when the mandible is in centric relation; this may or may not coincide with the maximal intercuspation

A

centric occlusion

65
Q

the complete intercuspation of the opposing teeth independent of condylar position, sometimes referred to as the “best fit of the teeth regardless of the condylar position”

A

maximal intercuspation

66
Q

movement of the mandible while in centric relation, from
the initial occlusal contact into
maximum intercuspation
– The difference between CENTRIC OCCLUSION and
MAXIMAL INTERCUSPATION, if
there is a difference

A

centric slide

67
Q

symptoms of tmd

A

pain, swelling, muscle spasms, limited movement and opening, clicking, popping, and locking of joint

68
Q

causes of tmd

A

bone pathology(condylar changes, ankylosis), muscle and tendon pathology (temporalis tendonitis), nerve pathology(trigeminal neuralgia), inflammatory(infection, RA), noninflammatory (osteoarthritis), neoplasia(ex. tumors), disc pathology(perforations, dislocations)

69
Q

most common causes of tmd

A

disc derangement/displacement and perforation

70
Q

disc almost always displaced

A

anteriorly

71
Q

disc derangement includes:

A

disc displacement with reduction, disc displacement without reduction, joint dislocation

72
Q

disc stretches over time; moves in front of condylar head and limits movement; clicking and popping typical symptom, mri is used to diagnose disc disorder

A

disc displacement

73
Q

hearing and palpating joint noises during opening and closing, protrusive opening and closings stop the reciprocal click

A

disc displacement with reduction

74
Q

history of clicking and popping with or without intermittent locking, complaint of limited mouth opening

A

disc displacement without reduction

head and neck anatomy (9 decks)

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