TMJ

Question 1

Functional relationship between maxillary and mandibular teeth: BLOCKAGE

Answer 1

Occlusion

Question 2

Grinding

Answer 2

Bruxism

Question 3

Overactive masseter and
temporalis resulting in increased compressive force between teeth

Answer 3

Clenching

Question 4

Space b/w occluding surfaces of teeth when the mandible is in physiologic resting position

Answer 4

Freeway space (FWS)

Question 5

how big is freeway space

Answer 5

2-4 mm

Question 6

• determined by the portion of the mandibular center incisor that is covered by the maxillary center incisor
  when the mandible is in the maximally occluded position
  *normal range: 1/3 of manibular center incisor

Answer 6

overbite
*vertical

Question 7

determined by the horizontal distance between the
maxillary arch and the mandibular arch when the
mandible is in its maximally occluded position

Answer 7

overjet

Question 8

normal range of overjet

Answer 8

3-6 mm

Question 9

Mandibular teeth sit further anterior than maxillary teeth

Answer 9

under bite

Question 10

an occlusal irregularity where the mandibular teeth and maxillary teeth are not in line with
the center incisors (i.e., either arch may shift to the
lateral side during occlusion). This type of occlusal
disharmony often may or may not affect the TMJ.

Answer 10

crossbite

Question 11

The TMJ is a __ joint lined with ____

Answer 11

synovial lined with fibro cartilage

Question 12

In full occlusion, molars are in approximation but front
teeth do not touch

Answer 12

open bite

Question 13

*mm that has eccentric control of disc, only muscular attachement to disc

Answer 13

superior head of lateral pterygoid

Question 14

___ cavity is relevant for anterior translation of the condyle

Answer 14

superior cavity

Question 15

____ cavity is relevant for rotation

Answer 15

inferior cavity

Question 16

The lateral pterygoids are very important because

Answer 16

superior portion attaches directly to the disc

Question 17

switch between rotational movement and translatory movement in TMJ

Answer 17

TMJ ligament (then blends into capsule laterally)

Question 18

___ branch of trigeminal nerve

Answer 18

mandibular branch (cranial nerve V3)

Question 19

TMJ opening arthrokinematics

Answer 19

anterior roll (in first 20-25 mm of motion) with inferior/anterior slide

Question 20

arthrokinematics of lateral deviation

Answer 20

ipsi rotation
contra condyle horizontal translation

Question 21

___ mm is functional

Answer 21

35

Question 22

normal ROM for opening

Answer 22

40-60 mm

Question 23

intercusupation is also called

Answer 23

closing

Question 24

lateral deviation norms

Answer 24

1/4 of opening, or about 10 mm

Question 25

Protrusion/Retrusion norms

Answer 25

* 5-10 mm protrusion * 3 mm retrusion

Question 26

habits that lend to misuse overuse of TMJ

Answer 26

Clenching/grinding of teeth (Over-activation of masticatory muscles) * Gum chewing * Other oral fixation PARAFUNCTIONAL HABITS

Question 27

HIGH PREVALENCE of ____ with TMJ, and also correlated with high disability

Answer 27

chronic pain (esp fibromyalgia)

Question 28

difference between ADDwR and ADDwoR

Answer 28

-ADDwR: clicking/popping -ADDwoR: no clicking, limitation with opening (blocking condylar head) OR disc is so anteriorly displaced that no limitation

Question 29

Group 1 diagnostic classification of TMD

Answer 29

1a: normal opening 1b: limited opening

Question 30

Group 2 diagnostic classification of TMD

Answer 30

2a: disc displacement with reduction 2b: disc disp. w/o reduction WITH limited opening 2c: disc disp. w/o reduction WITHOUT limited opening

Question 31

Group 3 diagnostic classification of TMD

Answer 31

joint dysfunction 3a: arthraliga 3b: osteoarthritis 3c: osteoarthrosis

Question 32

super important associated conditions with TMD!

Answer 32

HEADACHES NECK PAIN others: -ear stuff -dizziness -swallowing/speech dis -trigeminal neuralgia -post herpetic neuralgia -meniere's disease -

Question 33

What is the cotton roll test?

Answer 33

if pain decreases: joint related to confirm: test nonpainful side --> this will compress the painful side, will tell you PAIN = JOINT more pain -> mm

Question 34

mandibular neurodynamic testing sequence

Answer 34

capital cervical flexion upper contralateral SB lateral glide of mandible MDNT used if you suspect neural origin of pain

Question 35

what is a test to identify discal issues?

Answer 35

CRPT: centric relation provocation test *if pain is recreated anterior to tragus, indicates structural pathology of disc complex