Focusing on a Type 3a atlas fracture, this model illustrates a bilateral break of the anterior and posterior arches of C1 without involvement of the transverse ligament. Classified under the Gehweiler system, this injury is typically considered stable. The model provides anatomical context for understanding the circular fracture pattern and its effect on the ring structure of the atlas. It's a useful educational aid for examining classic Jefferson-type fractures in a non-ligamentous context.
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