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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.

34A1 Extraarticular, avulsion fracture

34A1* Extraarticular, avulsion fracture

*Qualifications:
a - Proximal pole
b - Distal pole
c - Lateral side
d - Medial side

34B1 Partial articular, sagittal, lateral fracture

34B1.1 Simple fracture

34B1.2 Fragmentary fracture

34B2 Partial articular, sagittal, medial fracture

34B2.1 Simple fracture

34B2.2 Fragmentary fracture

34C1 Complete articular, frontal/coronal, simple fracture

34C1.1 Middle third fracture

34C1.2 Proximal third fracture

34C1.3 Distal third fracture

34C2 Complete articular, frontal/coronal, wedge fracture

34C2 Complete articular, frontal/coronal, wedge fracture

34C3 Complete articular, frontal/coronal, multifragmentary fracture

34C3 Complete articular, frontal/coronal, multifragmentary fracture

Executive Editor: Chris Colton

Authors: Florian Gebhard, Phil Kregor, Chris Oliver

Additional credits

Patella

The revised AO/OTA classification (2018) is available here

Appendix

Note

The patello-femoral joint is the heaviest-loaded joint in the body. Any compromise of the joint surface is likely to lead to degenerative joint disease.
It is, therefore, highly desirable, in patellar fractures to strive for anatomical reduction of the joint surface and stable fixation. In addition, a treatment goal is restoration of function of the knee extensor mechanism.

Shortcuts

Decision support

Additional material

Further reading

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v1.0 2008-12-03