Jefferson Fracture / Atlas Ring Fracture

Keyfeature:-
• Fracture of Ring Of Atlas.
• Axial compression fracture.
• Most common Fracture of Atlas.

Complications:-
• No neurological damage (except pain or loss of sensation in greater occipital nerve distribution).

Diagnosis:-
• X-ray features :-
> Open mouth view - Overhanging lateral masses of C1 on C2.

• CT is defining.

T/t:-
•Mainly conservative.
> Undisplaced but stable - Semirigid cervical collar / Halo-vest
> Unstable with transverse ligament rupture - Halotraction followed by halo-vest immobilization.
> Late instability/ Non union - atlanto axial arthrodesis and atlanto occipital fusion.

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