Classification
Type I: Undisplaced; risk of avascular necrosis (AVN) <10%
Type II: Displaced fracture with subtalar subluxation or dislocation; risk of AVN >40%
Type III: Displaced fracture with subtalar and ankle dislocation; risk of AVN >90%
Type IV: Type III + variants (eg, dislocation of talonavicular joint); risk of AVN 100%
Explanation
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Figures
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Reference(s)
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