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Spinal Tx 600 > TMJ > Flashcards

Flashcards in TMJ Deck (40):
1

TMJ

Synovial
Condylar
Fibrocartilaginous surface (not hyaline)
Articular disc

2

Articular disc

Meniscus
Divides each joint into two cavities

Provides congruent contours and lubrication for the joint

Innervated along periphery but aneural and avascular in its intermediate (force bearing zone).

3

What movements happen in the upper cavity of the TMJ?

Gliding
Translation (sliding)

4

What movements occur in the lower cavity of the TMJ?

Rotation (hinge)

5

TMJ: rotation

Occurs from beginning to midrange of movement
Primarily occurs in the inferior joint space

Pterygoid draws meniscus anteriorly

Condylar head rotates (post glide) past disc





6

Opening mouth involved what two phases

Rotation
Gliding

7

TMJ: gliding

Second half of opening jaw. Necessary past 15°
Mostly superior joint space

Anterior translation of condyle and disc together along slope of articular eminence

8

TMJ: resting position

Slightly open
Lips touching
Teeth not touching

9

TMJ: closed packed

Teeth clenched

10

TMJ: capsular pattern

Limited opening

11

Centric occlusion

Relation of jaws and teeth when there is maximum contact of teeth

Position of jaw while swallowing

12

Median occlusal pattern

The position in which the teeth are fully interdigitated

13

TMJ actively displaces ....

Anteriorly and slightly laterally

14

Three Cardinal features of TMD

Orafacial pain
Restricted jaw motion
Joint noise

15

Hyoid bone

"Skeleton of the tongue"

Attachment for extrinsic tongue and infrahyoid muscles.

Provides reciprocal stabilization during swallowing.

Can affect shoulder and cervical function

16

TMJ innervation

Branches of auriculotemporal and masseteric branches of mandibular nerves.

17

Temporomandibular ligament

AKA lateral ligament

Restrains movement of lower jaw; prevents compression of tissues behind condyles.

Connect zygomatic arch and neck of mandible with joint capsule

18

Sphenoidmandibular ligaments

Attach sphenoid to mandible

Guide movement-- keep disc, condyles and temporal bone firmly opposed.

19

Stylomandibular ligament

Connects styloid process of temporal bone to ramus of mandible

Specialized band of deep cerebral fascia with thickening if parotid fascia

Guide movement-- keep disc, condyles and temporal bone firmly opposed.

20

How many deciduous teeth?

20

21

How many permanent teeth?

32

22

Pain in fully opened position

Probably extra-articular

23

Pain with biting firm objects

Probably intra-articular

24

Limited opening

Disc displaced anteriorly, inert tissue tightness, or muscle spasm.

25

Vertical dimension

Distance between to arbitrary points in the face, where is above and the other below the face.

26

Stiffness on waking, pain on function that improves over the day

Osteoarthritis

27

Mouth breathing

Tongue does not sit in proper position against the palate

Tongue normally provides internal pressure to shape the mouth; counterbalanced by buccinator and orbicularis oris complex.

28

Clicking/crepitus

Results from abnormal motion of disc and mandible.

29

Single click

Disc sticks early in opening, when condyle slides off rim into centre.

Clicks when it snaps into place.

30

Disc displacement with reduction

Partial anterior displacement of disc; needs to be overridden in order for condyle to reach normal open position (click)

(Can click again when re-subluxes)

31

Reciprocal clicking

First click when condyle moves along posterior border of disc

Normal function

When condyle moves back to posterior zone another click.

32

Bruxism

Clenching, grinding of teeth.

Can lead to facial, jaw, or tooth pain. Headaches.

Adhesive clicking after clenching.

33

TMD: stage 1

Disc slightly medial and anterior

Inconsistent click

Maybe pain. Maybe not

34

TMD: stage 2

Disc anterior and medial

Reciprocal click (early on opening; late on closing)

Severe constant pain

35

TMD: stage 3

Reciprocal constant click (later on opening; early on closing)

Most painful

36

TMD: stage 4

Click rare (disc no longer relocates)

No pain

37

Occlusal interference

Premature tooth contact that deflects jaw laterally and/or anteriorly.

38

During cervical flexion the mandible moves

Up and forward

39

During cervical extension the mandible moves

Back and down

40

With side flexion, maximum occlusion occurs

On the ipsilateral side.