TMJ Flashcards
Bilateral diarthrosis means
left and right sides must function together
- Ginglymoarthrodial=
hinge and sliding movement
Articulating surfaces are covered in __________rather than hyaline cartilage
fibrocartilage
Only joint in human body to have a ________ endpoint of closure where the teeth make occlusal contact
rigid
- Last joint to start developing beginning at around _______ weeks in utero
7
Articular disc
Fibrocartilage devoid of any ___________
or ___________
consits of _________ type of collagen
Fibrocartilage devoid of any blood vessels or nerve fibers
– Type I collagen
- Divides the joint into two separate
compartments
– Upper joint space= ___________ movements
like ___________ and __________
– Lower joint space= __________ movements like
__________ and __________
- 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
- Superior retrodiscal lamina
– Composed of __________
– Prevents the disc from _________ - Inferior retrodiscal lamina
– Composed of ___________
– Prevents the disc from _________ - Intermediate retrodiscal tissue
– Consists of __________
- 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
synovial fluid fun:
synovial fluid
– Minimizes friction
– Distribution of nutrients
Articular cartilage consists of __________ cartilage
– Type II collagen
– Proteoglycans
Name ligaments of TMJ
- Intrinsic/Functional
– Capsular
– Lateral/temporomandibular
– Collateral/discal - Extrinsic/Accessory
– Stylomandibular
– Sphenomandibular
Capsular Ligament
* Capsule that encapsulates _______ and retains s________-
Capsular Ligament
* Capsule that encapsulates entire joint and retains synovial fluid
Which ligament provides proprioceptive feedback?
Capsular Ligament
_________ ligament limits mouth opening
Lateral Ligament
Lateral Ligament
* Outer oblique portion limits ___________
* Inner horizontal portion prevents the disc and condyle from dislocating __________
Lateral Ligament
* Outer oblique portion limits mouth opening
* Inner horizontal portion prevents the disc and condyle from dislocating posteriorly
Strain on __________ ligament produces pain
Collateral
Stylomandibular Ligament
* Extends from _________ to _______
* Thickening of fascia of _________ gland
* Limits excessive ________ of mandible
Stylomandibular Ligament
* Extends from styloid process to angle of
mandible
* Thickening of fascia of parotid gland
* Limits excessive protrusion of mandible
Sphenomandibular Ligament
* Extends from spine of ___________ to
___________
* Embryonic remnant of ________ cartilage
__________ affects on mandible
- 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
Ligament that calcifies in Eagle syndrome
Stylohyoid ligament
Neurovascular Supply
* Supplied mainly by __________
* Minor sensory contribution from the
_______ and __________
* Supplied mainly by __________ and ________ arteries of external carotid artery
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
__________ muscle helps in mouth opening
Lateral pterygoid
- With reduction=
- Without reduction=
- With reduction= CLICK
- Without reduction= LOCK
- deviates toward one side then returns back to midline at maximum opening is termed as
Deviation
Recurrent Dislocation
Tx:
- Tx: Botox injection of lateral pterygoid or
surgery if chronic
Ankylosis
* _________ is the most common cause
* ___________ can also cause ankylosis
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
Bruxism
TX:
Occlusal guard
Nerve most damaged in TMJ surgery
FACIAL
Myofascial Pain Syndrome (MPS)
* Trigger points in ____________
* Diffuse pain in __________r region
* Tx:
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
disc repositioning surgery, for painful persistent
clicking or closed lock is termed
Arthroplasty
two cannulas, instrumentation within superior joint
space is termed as
- Arthroscopy
two needles to flush out superior joint
space is termed
- Arthrocentesis
- Medical therapy
- Medical therapy—NSAIDs, steroids, analgesics,
antidepressants, muscle relaxants
________ film that best visualizes the lateral aspect of the TMJ, and thus is able to view the _________ pole of the condylar head.
Atranscranial viewis 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.
_________ are the most likely group of those listed to have a temporomandibular or orofacial pain complaint.
Young women
The normal mandibular opening for a female is______ mmand for a male is_______- mm.
The normal mandibular opening for a female is35-45 mmand for a male is40-50 mm.
The fibrocartilage extracellular matrix contains___________
type I collagenandelastin.
Function of collagen and elastin
The function of collagen is to resist tensile forces, while the purpose of elastin is to maintain the shape of the disc.
The elastin is primarily located in the
The elastin is primarily located in the anterior and posterior attachment structures of the articular disc.
muscle fatigue in the masseter would affect the ability to close/ open the mouth?
close
Painless preauricular crepitusis most likely associated with ___________
Tx:
osteoarthritis.
symptomatic management- include reassurance, pharmacological management with analgesics and muscle relaxants, and physiotherapy.
