Anderson and D'Alonzo classification of C2 odontoid fractures (diagrams)

Case contributed by Assoc Prof Craig Hacking

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
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Case information

rID: 87249
Published: 25th Feb 2021
Last edited: 13th Apr 2021
Inclusion in quiz mode: Included

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