Orthonotes
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v3.0 Fusion
v3.0 Fusion
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Lauge–Hansen Mechanism — Ankle

SA (supination-adduction): lat avulsion → vertical medial fx. SER (supination-external rotation): ATFL → fibula at level → posterior → medial (most common). PA (pronation-abduction), PER (pronation-external rotation) sequences predict associated injuries.

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SA (supination-adduction): lat avulsion → vertical medial fx. SER (supination-external rotation): ATFL → fibula at level → posterior → medial (most common). PA (pronation-abduction), PER (pronation-external rotation) sequences predict associated injuries.
MCQs

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Question 1

In the Lauge-Hansen classification, which mechanism is characterized by the foot being in a supinated position with an adduction force applied to the talus?

Question 2

Which type of ankle fracture is most commonly associated with the Supination-External Rotation (SER) mechanism according to the Lauge-Hansen classification?

Question 3

What is the typical radiological equivalent of a Supination-Adduction (SA) fracture?

Question 4

During which stage of the Supination-External Rotation (SER) mechanism does the disruption of the anterior inferior tibiofibular ligament occur?

Question 5

Which injury is pathognomonic for Stage 2 of the Supination-Adduction (SA) mechanism?

Question 6

What type of fracture is typically seen in Stage 3 of the Supination-External Rotation (SER) mechanism?

Question 7

In the context of ankle fractures, what does the term 'bimalleolar equivalent' refer to?

Question 8

Which Lauge-Hansen fracture mechanism is least common compared to the others?

Question 9

What is the significance of understanding the Lauge-Hansen classification in clinical practice?

Question 10

In the Supination-External Rotation (SER) mechanism, what type of fracture is characteristic of Stage 2?