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cervical_facet_dislocation

Cervical facet dislocation

The injury usually results from forced flexion of the cervical spine. However, where there is a degree of rotation, the facet dislocation may only occur to one facet joint:

bilateral facet dislocation: unstable

unilateral facet dislocation: stable

Facet dislocation can occur to varying degrees:

subluxed facets

perched facets

locked facets

Represent spectrum of osteoligamentous pathology that includes unilateral facet dislocation most frequently missed cervical spine injury on plain xrays leads to ~25% subluxation on xray associated with monoradiculopathy that improves with traction

bilateral facet dislocation leads to ~50% subluxation on xray often associated with significant spinal cord injury facet fractures more frequently involves superior facet may be unilateral or bilateral

Epidemiology

location ~75% of all facet dislocations occur within the subaxial spine (C3 to C7) 17% of all injuries are fractures of C7 or dislocation at the C7-T1 junction this reinforces the need to obtain radiographic visualization of the cervicothoracic junction Pathophysiology mechanism flexion and distraction forces +/- an element of rotation

cervical_facet_dislocation.txt · Last modified: 2017/11/14 14:59 by administrador