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)
