Authors of section


Alex Vaccaro, Frank Kandziora, Michael Fehlings, Rajasekaran Shanmughanathan

Executive Editor

Luiz Vialle

General Editor

German Ochoa (in memoriam)

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A1 Wedge-compression fractures


Type A1 injuries are vertebral body fractures with one or both endplates involved but the fractures do not connect with one another.

These can be called wedge compression or impaction fractures.

Thoracic and Lumbar Fractures: Rationale for fracture classification


Be aware of the possible involvement of the posterior tension band, making this injury a B type instead of an A type. This can be determined pressing a finger between two spinous processes, when a gap can be felt or the patient feels pain (M1). Any doubt, confirm with MRI.

Check for involvement of the posterior tension band

X-ray/ CT

CT/radiograph images are examined to determine the fracture type.

Diagnosis: X-ray/CT, A1 – Wedge-compression
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