TMJD Flashcards
(39 cards)
What two bones does that the TMJ lie in between.
The mandible and the temporal bone
What the blood supply of the TMD
Deep auricular artery which is a branch of the maxillary artery
What is the nerve supply of theTMJ
Auriculotemporal nerve
What kind of movement is the upper joint cavity of the TMJ
Gliding movements
Protrusion retraction side to side
Lower cavity of the TMJ is responsible for what kind of movement
Rotation
Elevation and depression
What ligaments are associated with the TMJ and what is their function
Lateral, spehnomandibular and stylomandubuliar
They limit movement
What divides the joint into superior and inferior join space
The intrartiucalr disc
What part of the intrarticular disc is innervated
Not the anterior portion
It is the posteior and the bilaminar zone
What is the normal range of movement of the TMJ
35-40mm
How can we indirectly assess the lateral pterygoid
Noting a reposne ( pre auricular pain) to attempted opening against the examiners hand below the chin
Which MOM cannot be examined
Medial pterygoid
What is the only radiographic projection to show the whole joint
Trans-cranial oblique lateral view
A clincal diagnosis of suspected internal derangement might lead to the requirement of what kind of imaging
MRI
What does arthroscopy allow
Visualisation of the upper joint space and opportunity for minor surgical intervention under LA
Why in arthroscopy is it only the upper joint cavity space we access
This is because the lower space is more difficult to access without their being risk of damage to the articular disc
Name 5 managment strategies of someone complaining of TMJ pain and dysfunction
Reassurance and explanation of condition to the patient
Jaw rest and soft diet
Analgesic advice
Occlusal splints to interfere with parafunction
Physiothepry
Muslce relaxants
Supported yawning, no chewing gum, dont chew on pencils
Local measures ; cold compresses or heat pad
Where does the articular disc normally sit
In the anteior aspect of the condylar head
Define internal derangement
Abnormality in position of the articular disc that interferes with function and may be associated with other symtoms
What the most common type internal derangement
Anteior disc displacement
What is disc displacement with reduction
Reduction means that a displaced disc reduces into a normal position on opening but reverts back to an abnormal positioning on closing
What clincal features would you see in disc displacement with reduction
Clicking!!! - on opening and closing
Deviation of the maidble
What is disc displacement without reduction
If there is no reduction a displaced disc remains in the displaced position regardless of the state of opening
What clinical features may be seen in disc displacement without reduction
No click !!
Reduction in opening
Pain in front of the ear
When is surgery indicated for TMD
Surgery is only indicateed where non surgical methods have failed and the Symtoms are severe
