Temporomandibular Disorders – 13% 7Q

Question 1

A TMJ problem after debanding may indicate

Answer 1

CR / CO discrepancy

Question 2

Name the 3 types of condylar movements

Answer 2

rotation/hinge

translation

Question 3

In Posselt’s envelope, what is the last closing movement ?

Answer 3

Hinge

Question 4

describe the disc position of the TMJ in a patient with closed lock

Answer 4

anterior disc displacement without reduction

limited opening (~23mm)

Question 5

describe the disc position of the TMJ when the patient is in open lock

Answer 5

the condyle is entrapped in front of the lagging disc and cannot slide back under the fossa

Question 6

the mandible can only be dislocated (posteriorly/anteriorly)

Answer 6

anteriorly

Question 7

Normal maximum opening is ___ - ___ mm

Answer 7

50 - 60mm

Question 8

You can induce _________ due to anterior disc displacement after 30 min of reduction (opening)

Answer 8

clicking

Question 9

anterior disc displacement (is/is not) a common symptom of TMD

Answer 9

is not

Question 10

during anterior disc displacement, the posterior border of the disc will thin and the inferior restrodiscal lamina is elongated resulting in the condyle articulating on the _____________ border of the disc instead of the _______________ zone.

Answer 10

posterior

intermediate

Question 11

referred TMD pain travels toward the _________ and can cause what symptom?

Answer 11

head (cehpalad direction)

headache

Question 12

Innervation of the TMJ include two branches on cranial nerve ___. Also name the 2 branches.

Answer 12

V3

Auriculo-temporal, masseteric

Question 13

what type of joint is the TMJ? clue: it is bi-arthrodal

Answer 13

ginglymoarthroidial

Question 14

TMJ is a __________ joint where the articular surface is lined by a thin ___________ membrane

Answer 14

synovial

synovial

Question 15

The articulating surface of the condyle is covered with _______________, which may be associated with chondrocytes

Answer 15

dense fibrous CT

Question 16

The superior joint compartment of the TMJ provides _______________ movement

Answer 16

translational

Question 17

The inferior joint compartment of the TMJ provides ____________ movement

Answer 17

rotational

Question 18

the glenoid fossa is lined with ?

Answer 18

hyaline cartilage / fibrocartilage

Question 19

does the glenoid fossa undergo remodeling?

Answer 19

yes, and this can affect the position of the chin

Question 20

what happens to the glenoid fossa with age?

Answer 20

it gets deeper

Question 21

what is the major area of adaptation and compensation of the Mn?

Answer 21

Ramus

Question 22

The degenerative joint disease osteoarthritis will present clinically as: (3)

Answer 22

sudden change in occlusion

open bite

pain

Question 23

what is the most important cardinal symptom of TMD?

Answer 23

limited opening

Question 24

What are the subjective cardinal symptoms of TMD?

Answer 24

Pain – does not cross midline (psychogenic)

Limited opening *most important

Noise

Question 25

What are the **objective** cardinal symptoms of TMD?

Answer 25

ADD locking condylar dislocation

Question 26

what is a symptom?

Answer 26

something a patient notices. Are subjective and open to individual interpretation

Question 27

what is a clinical sign?

Answer 27

an abnormality a health care professional notes during an examination. More subjective and usually confirm symptoms the patient describes

Question 28

what 3 things are myofacial pain dysfunction related to?

Answer 28

occlusion trauma physiologic factors

Question 29

what is the primary etiology of TMD?

Answer 29

parafunctional habits

Question 30

unlike other joint discs, the TMJ disc is made of

Answer 30

fibrous CT others are hyaline

Question 31

the the condyle is 2x larger in the _________ dimension than in the _____________ dimension

Answer 31

transverse AP

Question 32

moving dentition from CR → CO will ( inc / dec ) the VDO

Answer 32

increase

Question 33

who has more prevalence of TMD: general population or orthodontic population? whose study?

Answer 33

they are the same Sadowsky and BeGole

Question 34

TMD affects which sex more?

Answer 34

females

Question 35

IF TMD is stress related, patients are also likely to present with

Answer 35

trismus and muscle spasms

Question 36

anatomically, TMD is due to

Answer 36

pathology or derangements

Question 37

Treatment for TMD consists of: (3)

Answer 37

Flat appliance for muscle relaxation (guards) Stress management Physical therapy

Question 38

the Pancherz Herbst study showed that TMD

Answer 38

increased for 3 months then returned to normal

Question 39

Joint sounds found in \_\_\_% of the population

Answer 39

25%

Question 40

Smith and Freer studied TMD in Ext vs Non-Ext patients and found:

Answer 40

no significance in rate of soft clicks

Question 41

T/F: Larsson and Ronnerman said that ortho can be preformed without fear of creating TMD

Answer 41

True

Question 42

Gianelli found no difference in condylar position in ext vs non-ext groups but Dibbets and VanDerWeele found increased clicking in:

Answer 42

4Bi ext group

Question 43

mandible will deviate to (affected / non-affected) side upon opening

Answer 43

affected

Question 44

what condition of a large salivary gland can mimic TMJ?

Answer 44

Parotitis