Thumb metacarpal fractures (illustration)

Discussion:

There are three common types of thumb metacarpal fractures:

These types of fractures are also related to the Green and O'Brien classification system of thumb metacarpal fractures:

  • type I: Bennett fracture
  • type II: Rolando fracture
  • type III: epibasal fracture
    • type IIIA: transverse
    • type IIIB: oblique
  • type IV: epiphyseal fracture
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