Anderson and D'Alonzo classification of C2 odontoid fractures (diagrams)
Diagnosis not applicable
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Diagrams of the types of odontoid fractures.
Case Discussion
-
type I
- (usually) oblique fracture of the upper part of the odontoid peg
- above the level of the transverse band of the cruciform ligament
-
type II
- transverse fracture at the base of the odontoid
- below the level of the transverse band of the cruciform ligament
- type IIa
- subtype of type II fractures with comminution at the odontoid base
- type III
- through the odontoid and into the lateral masses of C2