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Revised AO/OTA classification (Jan 2018)

Introduction

A revision of the AO/OTA Fracture and Dislocation Classification was published in the January 2018 issue of the Journal of Orthopaedic Trauma (Compendium and support material). This module is organized according to the 2007 version. Please read through its revised classification (below) before returning to the AO Surgery Reference.

12A1 Simple, spiral fracture

12A1* Simple, spiral fracture

*Qualifications:
a - Proximal 1/3
b - Middle 1/3
c - Distal 1/3

12A2 Simple, oblique fracture (≥30°)

12A2* Simple, oblique fracture (≥30°)

*Qualifications:
a - Proximal 1/3
b - Middle 1/3
c - Distal 1/3

12A3 Simple, transverse fracture (<30°)

12A3* Simple, transverse fracture (<30°)

*Qualifications:
a - Proximal 1/3
b - Middle 1/3
c - Distal 1/3

12B2 Intact wedge fracture

12B2* Intact wedge fracture

*Qualifications:
a - Proximal 1/3
b - Middle 1/3
c - Distal 1/3

12B3 Fragmentary wedge fracture

12B3* Fragmentary wedge fracture

*Qualifications:
a - Proximal 1/3
b - Middle 1/3
c - Distal 1/3

12C2 Multifragmentary, intact segmental fracture

12C2* Multifragmentary, intact segmental fracture

*Qualifications:
i - Proximal diaphyseal-metaphyseal
j - Pure diaphyseal
k - Distal diaphyseal-metaphyseal

12C3 Multifragmentary, fragmentary segmental fracture

12C3* Multifragmentary, fragmentary segmental fracture

*Qualifications:
i - Proximal diaphyseal-metaphyseal
j - Pure diaphyseal
k - Distal diaphyseal-metaphyseal

Executive Editor: Chris Colton

Authors: Pol Rommens, Peter Trafton

Additional credits

Humeral shaft

Appendix

Note

Examine upper arm for

  • Swelling
  • Ecchymosis
  • Deformity
  • Open wound
  • Neurologic or vascular deficit (esp. radial nerve)

An adjacent wound implies an open fracture, which needs urgent surgical debridement.

Shortcuts

Evidence summary

Decision support

Additional material

Further reading

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v1.0 2006-09-14