Talar neck fracture

Talar neck fractures extend through the thinnest cross-sectional portion of the talus, just proximal to the talar head. They represent one of the most common types of talus fracture (~30-50%), along with chip and avulsion fractures of the talus (~40-49%). These fractures are commonly associated with subtalar dislocation and/or posterior body fractures 4.

Mechanism of injury

These fractures usually result from hyperdorsiflexion.

Classification

Hawkins classification 1:

  • type I: non displaced fracture
  • type II: displaced fracture with subluxation or dislocation of the subtalar joint and a normal ankle joint
  • type III: displaced fracture with body of talus dislocated from both subtalar and ankle joint

Canale and Kelly 2 describes a rare type IV category which in addition to features describes in type III there is dislocation or subluxation of the head of the talus at the talonavicular joint.

  • hardware complications
    • loosening
    • backing out
    • hardware or peri-hardware fracture
  • tendon entrapment or injury
  • risk of avascular necrosis (AVN) increase with increase in classification type
    • type I fractures has 0%–15% risk
    • type II fractures have 20%–50% risk
    • type III fractures approach 100% risk
    • type IV fractures have 100% risk

It was first described by L G Hawkins in 1970 1.

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Article information

rID: 18268
Tags: cases, refs
Synonyms or Alternate Spellings:
  • Talar neck fractures

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Cases and figures

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    Figure 4: type 4
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    Case 1: type 1
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