Classifications commonly used in orthopaedics

AO Classification – General Principles

General Principles
1-Humerus
2-Radius\Ulna
3-Femur
4-Tibia\Fibula
-1,2,3-prox.,diaphysis,distal

Diaphysis Epiphysis
A simple extra-artic
(1-spiral,2-oblique,3-transverse
B segmental partial-artic
C comminuted articular