Authors of section


Rahul Banerjee, Peter Brink, Matej Cimerman, Tim Pohlemann, Matevz Tomazevic

Executive Editor

Peter Trafton

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Unilateral complete disruption of posterior arch through SI joint

This is classified as an AO/OTA 61C1.2 injury.

Posterior injury
The posterior injury is a completely unstable injury through the SI joint, either:

  • Transiliac fracture dislocation (crescent fracture) with complete S-I displacement)
  • Pure SI dislocation

Anterior injury

Anterior injury is one or more of the following:

  • Symphyseal disruption
  • Pubis (uni/bilateral, ipsi/contralateral)
  • Ramus (uni/bilateral, ipsi/contralateral)
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