TMJ

Question 1

During the first half of jaw opening, the ___(upper/lower) portion of the joint rolls and then the ___ (upper/lower) portion glides anteriorly

Answer 1

lower
upper

Question 2

True/ Fale: The TMJ disc is attached anteriorly to the medial pterygoid which functions to pull the disc forward during closure.

Answer 2

false. it’s the lateral pterygoid.

Question 3

the 2 primary functions of theTMJ disc are ___

Answer 3

force dispersion and separating the cavity into functional components

Question 4

the retrodiscal laminae are 2 layers of connective tissue that check what motion? What might its laxity indicate?

Answer 4

stabilize disc to prevent ant translation ; ant displacement-it’s highly innervated and can cause pain when impinged by the mandible and maxilla

Question 5

This fan-shaped ligament helps prevent medial slippage of the disc and posterior dislocation of the joint–thus countering the pull from the lat pterygoid. What is it?

Answer 5

tempromandibular ligament

Question 6

List the 3 muscles of mastication that close the mouth. Which of them does NOT protrude the mandible?

Answer 6

temporalis, masseter, and medial pterygoid

temporalis

Question 7

The 4 categories of TMD include disc displacement w/ or w/o reduction, ___ (2)

Answer 7

myofascial and degenerative/inflammatory

Question 8

A physical examination for someone with masticatory muscle disorders might reaveal tenderness and turgor, lim ROM, and ___ (3)

Answer 8

aberrant pattern for AROM, pain with MMT, and pain with ipsilat tongue depressor bite

Question 9

What are some similarities in chief complaints you might hear from the 2 types of disc displacement?

Answer 9

preauricular p!
p! with palpation,
pain with compressive loading

Question 10

Your pt experiences audible/palpable clicking and popping for 1/3 trials but her ROM is still intact. What type of disc displacement is this?

Answer 10

disc displacement **WITH reduction

Question 11

disc displacement __ (with/without) reduction would report catching in either direction and limitation in opening.

Answer 11

without

Question 12

A “c” curve results from ipsilateral ___displacement of the disc (or hypomobile joint) but an “s” curve is caused by a ___ displacement (or muscular imblance)

Answer 12

anterior
medial

Question 13

T/F: Early deviation at the TMJ results from capsulitis.

Answer 13

false. It results from spasms.

late deviation=capsulitis

Question 14

IN DDWR, what is happening during the opening click? Reciprocal (closing) click?

Answer 14

opening: disc is popping back in to place (reduction)
closing: mandibular condle slipping over anteriorly placed disc.

Question 15

The pain from DDWOR results from compressive loading on what structure?

Answer 15

retrodiscal lamina

Question 16

the difference between open and closed lock is where in the joint the disc gets stuck. In __ lock, it is bunched anteriorly at rest and blocks the mandibular condyle. In ___ lock it’s behind the condyle, preventing it from sliding into the fossa.

Answer 16

closed (DDWOR)
open

Question 17

what 3 conditions fall into the joint dysfunction category of TMD?

Answer 17

degeneration, osteoarthritis, osteoarthrosis

Question 18

What chief complaint and observations might present in someone with TMJ dysfunction?

Answer 18

potentially crepitus
unilateral v bilateral s/s
deviations with open/close and contralateral translation