TMJ

Question 1

Aka TMJ

Answer 1

Temporomandibular Joint

Question 2

A joint on each side of the head that allows for movement of the mandible for mastication, speech, and respiratory movements

Answer 2

TMJ

Question 3

The TMJ is a joint that is on each side of the head that allows for movement of the mandible for

Answer 3

mastication, speech, and respiratory movements

Question 4

Most complex set of joints in the body

Answer 4

TMJ

Question 5

The TMJ is the articulation of the

Answer 5

temporal bone and the mandible

Question 6

The articulating area of the TMJ is located on the

Answer 6

inferior aspect of the temporal bone

Question 7

• The articulating area of the TMJ is located on the inferior aspect of the temporal bone
• The articulating area includes____

Answer 7

the articular eminence and the articular fossa of the temporal bone

Question 8

What is the articular eminence or tubercle?

Answer 8

a smooth-surfaced rounded protuberance on the inferior aspect of the zygomatic process and is positioned anterior to the articular fossa

Question 9

What is the articular fossa?

Answer 9

posterior to the articular eminence; it is a depression on the inferior aspect of the temporal bone; it is also posterior and medial to the zygomatic arch.

Question 10

Posterior to the articular fossa is a sharper ridge, called the

Answer 10

the postglenoid process or postglenoid tubercle

Question 11

The mandible articulates with each temporal bone at the

Answer 11

head of each mandibular condyle

Question 12

The growth center for the mandible is located in

Answer 12

the head of each mandibular condyle

Question 13

This is considered to be the last growth center of bone in the body, meaning it continues to grow later in life compared to most other bones

Answer 13

growth center for the mandible at the head of the mandibular condyle

Question 14

The TMJ is what type of joint?

Answer 14

The TMJ is a synovial joint

Question 15

The TMJ is a synovial joint. It is a _____with a ______ and is lined by a

Answer 15

It is a freely movable joint with a joint capsule and is lined by a synovial membrane

Question 16

What is a Joint capsule?

Answer 16

a thin, fibrous capsule that surrounds the joint

Question 17

The synovial membrane of the joint capsule of the TMJ secretes____ allowing for smooth movement between the articulating bones of the jaw and the skull

Answer 17

synovial fluid,

Question 18

Synovial fluid allows for

Answer 18

smooth movement between the articulating bones of the jaw and the skull

Question 19

What is synovial fluid?

Answer 19

Synovial fluid is a thick substance that fills the TMJ, lubricating it

Question 20

The mandible is joined to the cranium by

Answer 20

ligaments of the TMJ

Question 21

A ligament is a

Answer 21

band of fibrous tissue that connects bones

Question 22

There are how many ligaments associated with the TMJ?

Answer 22

three paired ligaments

Question 23

What the three paired ligaments associated with the TMJ?

Answer 23

Temporomandibular ligament

Stylomandibular ligament

Sphenomandibular ligament

Question 24

What is located on each side between the temporal bone and the condyle of the mandible

Answer 24

A joint disk

Question 25

The joint disc divides the TMJ into___

Answer 25

two compartments

Question 26

The joint disc divides the TMJ into two compartments. These two compartments are

Answer 26

the upper and lower synovial cavities

Question 27

Two basic types of movement of the mandible are performed by the TMJ (with the help of the muscles of mastication). What are the two movements

Answer 27

Gliding and rotational

Question 28

Gliding movement occurs mainly between the

Answer 28

disc and the articular eminence of the temporal bone in the upper synovial cavity

Question 29

Gliding movement allows the lower jaw to

Answer 29

move forward and backward (protrusion and retraction of the mandible)

Question 30

Rotational movement occurs mainly between the

Answer 30

disc and the mandibular condyle in the lower synovial cavity

Question 31

Rotational movement allows the jaw to

Answer 31

raise and lower (elevation and depression of the mandible)

Question 32

Lateral deviation of the mandible involves

Answer 32

both gliding and rotational movements

Question 33

What is TMD?

Answer 33

TMD - Temporomandibular disorder. Patients may present with a disorder associated with one or both of their TMJs

Question 34

Patients with TMD may experience

Answer 34

Chronic joint tenderness Swelling Painful muscle spasms Headaches Difficulty opening/closing/deviating their jaw

Question 35

How do we examine the TMJ?

Answer 35

palpating just anterior to each ear feeling for the articulation of the temporal bone and the mandible on each side of the head

Question 36

___aid in diagnosis of TMD

Answer 36

Radiographs and CBCT

Question 37

An acute episode of TMD can occur when a patient

Answer 37

opens too wide, causing subluxation and trismus

Question 38

What is Subluxation?

Answer 38

partial dislocation. The head of the condyle moves too far anteriorly past the articular eminence

Question 39

What is Trismus?

Answer 39

inability to normally open the mouth