1. How does a talar dome fracture occur?
2. What is the Hawkins classification of talar dome fractures?
3. What are complications of talar dome fracture?
4. What is seen clinically in talar dome fracture?
5. What imaging is required to diagnose talar dome fracture?
6. What is the treatment?
Answers:
1. Shear force on anterior lateral surface of talus or compression on posterior medial surface. (Inversion/PF or Eversion/DF)
2. 3 types: type 1 is a nondisplaced fx of talar neck, type 2 is a displaced fx of talar neck with ankle joint intact, type 3 is a displaced fx of talar neck with dislocation of body of talus from subtalar and ankle joints.
3. Avascular necrosis of talar body, displaced bone fragment into joint space.
4. Small painful effusion, decreased ROM in the setting of chronic ankle injury.
5. Mortise view of ankle, MRI.
6. Conservative tx is NWB. Surgical ORIF if indicated.
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