Diagnosis

Unilateral complete disruption of posterior pelvic arch (AO/OTA 61C1) 

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1. Unilateral complete distruption posterior arch through ilium 
2. 61-C1.2 Unilateral complete disruption posterior arch through SI joint
3. Unilateral complete disruption posterior arch through Sacrum 

1. Unilateral complete distruption posterior arch through ilium 

Posterior injury

Anterior injury

Posterior injury
The posterior injury is a complete fracture of the posterior ilium.

This is classified as an AO/OTA 61C1.1 injury.

Anterior injury
Anterior injury is one or more of the following:

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

2. 61-C1.2 Unilateral complete disruption posterior arch through SI joint

Posterior injury

Anterior 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

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

Anterior injury
Anterior injury is one or more of the following:

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

3. Unilateral complete disruption posterior arch through Sacrum 

Posterior injury

Anterior injury

Posterior injury
The posterior injury is a completely unstable vertical fracture through the sacrum.

This is classified as an AO/OTA 61C1.3 injury.

Anterior injury
Anterior injury is one or more of the following:

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