Difference between unilateral and bilateral interfacetal dislocations

What is the difference between unilateral and bilateral interfacetal dislocations?

Unilateral interfacetal dislocation (UID) (also known as unilateral locked facet injury) is a rotational injury of the cervical spine that results in unilateral facet joint dislocation with associated posterior ligamentous tear. Bilateral interfacetal dislocation (BID) (also known as bilateral locked facet injury) results from extreme hyperflexion, causing anterior dislocation of both facet joints. This is a serious injury that is commonly associated with spinal cord injury.


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