TMJ

Question 1

Bilateral diarthrosis means

Answer 1

left and right sides must function together

Question 2

• Ginglymoarthrodial=

Answer 2

hinge and sliding movement

Question 3

Articulating surfaces are covered in __________rather than hyaline cartilage

Answer 3

fibrocartilage

Question 4

Only joint in human body to have a ________ endpoint of closure where the teeth make occlusal contact

Answer 4

rigid

Question 5

• Last joint to start developing beginning at around _______ weeks in utero

Answer 5

7

Question 6

Articular disc
Fibrocartilage devoid of any ___________
or ___________
consits of _________ type of collagen

Answer 6

Fibrocartilage devoid of any blood vessels or nerve fibers
– Type I collagen

Question 7

• Divides the joint into two separate
  compartments
  – Upper joint space= ___________ movements
  like ___________ and __________
  – Lower joint space= __________ movements like
  __________ and __________

Answer 7

• Divides the joint into two separate
  compartments
  – Upper joint space= translational movements
  like protrusion and retrusion
  – Lower joint space= rotational movements like
  depression and elevation

Question 8

• Superior retrodiscal lamina
  – Composed of __________
  – Prevents the disc from _________
• Inferior retrodiscal lamina
  – Composed of ___________
  – Prevents the disc from _________
• Intermediate retrodiscal tissue
  – Consists of __________

Answer 8

• Superior retrodiscal lamina
  – Composed of elastic fibers
  – Prevents the disc from dislocating anteriorly
• Inferior retrodiscal lamina
  – Composed of collagen fibers
  – Prevents the disc from excessively rotating
  over condyle
• Intermediate retrodiscal tissue
  – Consists of loose areolar connective tissue
  containing blood vessels and nerves

Question 9

synovial fluid fun:

Answer 9

synovial fluid
– Minimizes friction
– Distribution of nutrients

Question 10

Articular cartilage consists of __________ cartilage

Answer 10

– Type II collagen
– Proteoglycans

Question 11

Name ligaments of TMJ

Answer 11

• Intrinsic/Functional
  – Capsular
  – Lateral/temporomandibular
  – Collateral/discal
• Extrinsic/Accessory
  – Stylomandibular
  – Sphenomandibular

Question 12

Capsular Ligament
* Capsule that encapsulates _______ and retains s________-

Answer 12

Capsular Ligament
* Capsule that encapsulates entire joint and retains synovial fluid

Question 13

Which ligament provides proprioceptive feedback?

Answer 13

Capsular Ligament

Question 14

_________ ligament limits mouth opening

Answer 14

Lateral Ligament

Question 15

Lateral Ligament
* Outer oblique portion limits ___________
* Inner horizontal portion prevents the disc and condyle from dislocating __________

Answer 15

Lateral Ligament
* Outer oblique portion limits mouth opening
* Inner horizontal portion prevents the disc and condyle from dislocating posteriorly

Question 16

Strain on __________ ligament produces pain

Answer 16

Collateral

Question 17

Stylomandibular Ligament
* Extends from _________ to _______
* Thickening of fascia of _________ gland
* Limits excessive ________ of mandible

Answer 17

Stylomandibular Ligament
* Extends from styloid process to angle of
mandible
* Thickening of fascia of parotid gland
* Limits excessive protrusion of mandible

Question 18

Sphenomandibular Ligament
* Extends from spine of ___________ to
___________
* Embryonic remnant of ________ cartilage
__________ affects on mandible

Answer 18

• Extends from spine of sphenoid bone to
  lingula of mandible
• Embryonic remnant of Meckel’s cartilage
• Helps support the mandible but has no
  limiting effects on its movement

Question 19

Ligament that calcifies in Eagle syndrome

Answer 19

Stylohyoid ligament

Question 20

Neurovascular Supply
* Supplied mainly by __________
* Minor sensory contribution from the
_______ and __________
* Supplied mainly by __________ and ________ arteries of external carotid artery

Answer 20

Neurovascular Supply
* Supplied mainly by auriculotemporal nerve of V3
* Minor sensory contribution from the masseteric and deep temporal branches of V3
* Supplied mainly by superficial temporal and maxillary arteries of external carotid artery

Question 21

__________ muscle helps in mouth opening

Answer 21

Lateral pterygoid

Question 22

• With reduction=
• Without reduction=

Answer 22

• With reduction= CLICK
• Without reduction= LOCK

Question 23

• deviates toward one side then returns back to midline at maximum opening is termed as

Answer 23

Deviation

Question 24

Recurrent Dislocation
Tx:

Answer 24

• Tx: Botox injection of lateral pterygoid or
  surgery if chronic

Question 25

Ankylosis * _________ is the most common cause * ___________ can also cause ankylosis

Answer 25

Ankylosis * Union between condyle and skull can be either bony or fibrous * Trauma is the most common cause * Surgery, radiation therapy, and infection can also cause ankylosis

Question 26

Bruxism TX:

Answer 26

Occlusal guard

Question 27

Nerve most damaged in TMJ surgery

Answer 27

FACIAL

Question 28

Myofascial Pain Syndrome (MPS) * Trigger points in ____________ * Diffuse pain in __________r region * Tx:

Answer 28

Myofascial Pain Syndrome (MPS) * Chronic muscular pain disorder * Most common cause of masticatory pain * Trigger points in muscles of mastication * Diffuse pain in preauricular region * Parafunctional habits can contribute * Tx: physical therapy, stress management, splint therapy, medications

Question 29

disc repositioning surgery, for painful persistent clicking or closed lock is termed

Answer 29

Arthroplasty

Question 30

two cannulas, instrumentation within superior joint space is termed as

Answer 30

* Arthroscopy

Question 31

two needles to flush out superior joint space is termed

Answer 31

* Arthrocentesis

Question 32

* Medical therapy

Answer 32

* Medical therapy—NSAIDs, steroids, analgesics, antidepressants, muscle relaxants

Question 33

________  film that best visualizes the lateral aspect of the TMJ, and thus is able to view the _________ pole of the condylar head.

Answer 33

A transcranial view is a plain film that best visualizes the lateral aspect of the TMJ, and thus is able to view the lateral pole of the condylar head.

Question 34

_________ are the most likely group of those listed to have a temporomandibular or orofacial pain complaint.

Answer 34

Young women 

Question 35

The normal mandibular opening for a female is ______ mm and for a male is _______- mm.

Answer 35

The normal mandibular opening for a female is 35-45 mm and for a male is 40-50 mm.

Question 36

The fibrocartilage extracellular matrix contains ___________

Answer 36

type I collagen and elastin.

Question 37

Function of collagen and elastin

Answer 37

The function of collagen is to resist tensile forces, while the purpose of elastin is to maintain the shape of the disc.

Question 38

The elastin is primarily located in the

Answer 38

The elastin is primarily located in the anterior and posterior attachment structures of the articular disc.

Question 39

muscle fatigue in the masseter would affect the ability to close/ open the mouth?

Answer 39

close

Question 40

Painless preauricular crepitus is most likely associated with ___________ Tx:

Answer 40

osteoarthritis. symptomatic management- include reassurance, pharmacological management with analgesics and muscle relaxants, and physiotherapy.