Orthonotes
Orthonotes
by the.bonestories
v3.0 Fusion
v3.0 Fusion
trauma topic hub

Denis Classification — Sacral Fractures (Zones)

Zone 1: lateral to foramina (alar) — low neuro risk. Zone 2: through foramina — higher L5/S1 root risk. Zone 3: medial to foramina (central canal) — highest cauda equina risk.

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Zone 1: lateral to foramina (alar) — low neuro risk. Zone 2: through foramina — higher L5/S1 root risk. Zone 3: medial to foramina (central canal) — highest cauda equina risk.
MCQs

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Question 1

In the Denis classification of sacral fractures, which zone is associated with the lowest risk of neurological deficit?

Question 2

Which of the following is the primary neurological deficit associated with Zone II sacral fractures?

Question 3

What is the primary management for a displaced Zone I sacral fracture?

Question 4

What is the neurological deficit rate associated with Zone III sacral fractures?

Question 5

Which neurological structures are most at risk in Zone III sacral fractures?

Question 6

Which clinical manifestation is most likely associated with a Zone I sacral fracture?

Question 7

A young adult presents with a sacral fracture following a high-energy trauma. Which zone is most likely affected?

Question 8

What is the primary clinical concern with Zone II sacral fractures?

Question 9

Which of the following is a common consequence of a Zone III sacral fracture?

Question 10

In the context of sacral fractures, what does the term 'insufficiency fracture' most commonly refer to?