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{| class="wikitable"
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! Dislocation Type
! Frequency
! Associated with trauma?
! Mechanism
! Additional Comments
! Associated with fracture?
! Image
|-
| '''Anterior'''
|
*Most common
|
*No
|
*Spontaneously while patient is yawning, "popping" ears, or laughing
*Risk factors:
**Prior dislocation
**Weakness or laxity of capsule
**Ligamentous injury
|
*Mandibular condyle forced in front of the articular eminence
*May happen bilaterally or unilaterally
|
*No
|
[[File:Anterior Dislocation.jpeg|100px]]
|-
| '''Posterior'''
|
*Rare
|
*Yes
|
*Follows a blow to the mandible that may or may not break the condylar neck
|
*Condylar head may prolapse into the external auditory canal
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*Possible
|
[[File:Posterior Dislocation.jpeg|100px]]
|-
| '''Lateral'''
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*Rare
|
*Yes
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*Lateral trauma to mandible
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*Often associated with mandibular fracture
|
*Yes
|
[[File:Lateral Dislocation.jpeg|100px]]
|-
| '''Superior'''
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*Rare
|
*Yes
*Occur from blow to the partially opened mouth
|
*Can result in a fracture of the glenoid fossa and displacement of the condyle into the middle cranial fossa, potentially injuring the facial and vestibulocochlear nerves and the temporal lobe.
*Associated with cerebral contusions, facial nerve palsy, deafness
|
*Yes
|
[[File:Superior Dislocation.jpeg|100px]]
|}

Revision as of 15:14, 29 March 2020

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