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AO classification of fractures - general principles

Classification

General Principles

1 - Humerus
2 - Radius/Ulna
3 - Femur
4 - Tibia/Fibula
-1,2,3 = Proximal, diaphysis, distal

Diaphysis/Epiphysis
A - Simple extra-articicular (1-spiral, 2-oblique, 3-transverse)
B - Segmental partial-articular
C - Comminuted articular

Explanation

The AO group has developed a comprehensive classification of fractures. This classification is arranged in order of increasing severity according to the complexities of the fracture, difficulty of treatment, and worsening prognosis.

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