TMJ Flashcards

1
Q

when the jaw opens wide what stops it from going into the neck?

A

Hinge and slide motion

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2
Q

what kind of joint is between the temporal bone and the mandible?

A

synovial joint

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3
Q

Name this part of a synovial joint

A

joint capsule

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4
Q

Name this part of a synovial joint

A

synovial membrane

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5
Q

Name this part of a synovial joint

A

hyaline articular cartilage

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6
Q

Name this part of a synovial joint

A

synovial fluid

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7
Q

what is the function of the hyaline articular cartilage in a synovial joint?

A

cushions the surface

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8
Q

movement at the TMJ is limited to? 2

A

contralateral TMJ
teeth

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9
Q

the TMJ is capable of what 2 movements?

A

hinge
slide

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10
Q

the TMJ is capable of hinge and slide movements so its called a ? joint

A

ginglymoarthroidial joint

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11
Q

name this bone that’s part of the TMJ

A

temporal bone

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12
Q

name this part of the TMJ

A

glenoid fossa

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13
Q

name this part of the TMJ

A

articular eminence

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14
Q

name this bone that’s part of the TMJ

A

zygomatic bone

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15
Q

name this part of the TMJ

A

condyle

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16
Q

the glenoid fossa is thin so what happens to the masticatory forces?

A

transmitted through the teeth

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17
Q

which side of the condyle is wider?

A

medial

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18
Q

how is the TMJ a special synovial joint? 2

A

2 compartments
fibrous cartilage not hyaline cartilage

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19
Q

name this part of the TMJ

A

joint capsule

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20
Q

the joint capsule is attached to what?

A

the glenoid fossa

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21
Q

the joint capsule is continuous with what?

A

the disc

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22
Q

what are the 2 layers of the joint capsule

A

outer fibrous layer
inner synovial membrane

23
Q

what is the function of the synovial membrane?

A

secretes synovial fluid to fill joint spaces

24
Q

what does the synovial fluid do? 3

A

contains proteoglycans
lubricant
nutritive

25
name this part of the TMJ
lateral ligament
26
the lateral ligament connects? 2
lateral surface of articular eminence to posterior surface of condyle
27
what does the lateral ligament do?
restricts movement
28
what is a raphe?
union between 2 muscles
29
Name this accessory ligament
Stylomandibular ligament
30
Name this accessory ligament
Sphenomandibular ligament
31
Name this accessory ligament
Pterygomandibular raphe
32
Which accessory ligament is important when giving anaesthesia and why??
Sphenomandibular ligament as runs close to alveolar bone
33
Name this structure of TMJ
Articular disc
34
What is the articular disc? 2
Dense fibrous disc Divides joint into 2 compartments
35
What r the 3 zones of the articular disc?
Anterior extension Posterior extension Disc
36
What r the three zones of the disc part of the articular disc?
Posterior band Intermediate band Anterior band
37
How many parts does the anterior extension of the articular disc have?
1
38
The anterior extension of the articular disc is continuous with what?
Superior head of lateral Pterygoid muscle
39
How many parts does the posterior extension of the articular disc have?
2
40
What r the two parts of the posterior extension of the articular disc?
Upper layer: vascular and elastic Lower layer: fibrous
41
The posterior extension is ? 2
Densely innervated Vascular
42
Why does clicking at the TMJ not normally cause pain?
The joint capsule is richly innervated but not in the disc
43
What is nociception?
Process of activating nerves that give rise to the sensation of pain
44
What is proprioception?
Process of knowing where your body is
45
Which nerve innervates the TMJ
Trigeminal, mandibular division CNV3
46
Which branches of CNV3 supply the TMJ? 3
Auriculotemporal Masseteric Deep temporal
47
Which arteries supply the TMJ with blood? 2
Superficial temporal artery Maxillary artery
48
Name this part of the articular disc of TMJ
Posterior extension
49
Name this part of the articular disc of TMJ
Posterior band
50
Name this part of the articular disc of TMJ
Intermediate zone
51
Name this part of the articular disc of TMJ
Anterior band
52
Name this part of the articular disc of TMJ
Anterior extension
53
The articular disc divides the joint into what 2 compartments?
Lower hinge Upper slide
54
What causes a clicking sound from TMJ?
Anterior disc displacement