From the case:
Gehweiler classification of atlas fractures (diagrams)
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Diagrams of the types of odontoid fractures.
Case Discussion
- type 1: fractures of the anterior arch
- type 2: fractures of the posterior arch and are usually bilateral
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type 3: fractures involving the anterior and posterior arch (Jefferson burst fracture)
- type 3a: intact transverse atlantal ligament
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type 3b: disrupted transverse atlantal ligament complex
- Dickman type 1: ligamentous disruption
- Dickman type 2: bony avulsion with an intact ligament transverse atlantal ligament
- type 4: fractures of the lateral mass
- type 5: isolated fractures of the C1 transverse process