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

Posterior Malleolus — Indications for Fixation

Fix if fragment >25–30% of tibial plafond, >2 mm displacement, syndesmotic instability, or posterolateral fragment involving PITFL. CT-based morphology guides approach: posterolateral approach common; direct reduction restores incisura and syndesmotic stability. Sequence: posterior malleolus first to stabilize syndesmosis, then fibula/medial malleolus. Fixation: screws posterior‑to‑anterior or buttress plate via posterolateral approach. Restoring posterior fragment reduces need for trans-syndesmotic screws.

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Fix if fragment >25–30% of tibial plafond, >2 mm displacement, syndesmotic instability, or posterolateral fragment involving PITFL. CT-based morphology guides approach: posterolateral approach common; direct reduction restores incisura and syndesmotic stability. Sequence: posterior malleolus first to stabilize syndesmosis, then fibula/medial malleolus. Fixation: screws posterior‑to‑anterior or buttress plate via posterolateral approach. Restoring posterior fragment reduces need for trans-syndesmotic screws.
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Question 1

What is the primary indication for fixation of a posterior malleolus fragment?

Question 2

What displacement measurement of the posterior malleolus fragment indicates a need for surgical fixation?

Question 3

Why is fixation of the posterior malleolus fragment critical in trimalleolar fractures?

Question 4

What is the most common type of posterior malleolus fracture according to the Bartoníček classification?

Question 5

What approach is typically used for surgical fixation of a posterior malleolus fracture?

Question 6

When is fixation of the posterior malleolus fragment likely to eliminate the need for a trans-syndesmotic screw?

Question 7

What role does the posterior inferior tibiofibular ligament (PITFL) play in relation to the posterior malleolus?

Question 8

In the context of posterior malleolus fixation, what is the sequence of fixation that is recommended?

Question 9

What is the significance of restoring the posterior malleolus fragment in terms of syndesmotic stability?

Question 10

What is the potential consequence of not fixing a displaced posterior malleolus fragment?