Green and O'Brien classification of thumb metacarpal fractures

The Green and O'Brien classification of thumb metacarpal fractures is a commonly used classification system when assessing thumb metacarpal fractures.

However, since most types of fractures coincide with famous eponymous fractures, the system itself isn't usually used properly, giving preference to naming the types as the eponymous fractures themselves.

Classification

• type I: simple intra-articular (Bennett fracture)
• type II: comminuted intra-articular (Rolando fracture)
• type III: extra-articular, epibasal (pseudo-Bennett fracture)
  • IIIA: transverse
  • IIIB: oblique
• type IV: epiphyseal fracture

See also

• Bennett fracture
• Rolando fracture
• Epibasal or pseudo-Bennett fracture