Ulna metaphyseal Fracture: Biyani classification

Biyani classification of distal ulna fractures
1 Simple extraarticular fracture with minimal comminution
2 Inverted T or Y shaped fracture with an ulnar styloid fragment including a portion of the metaphysis
3 Fracture of the lower end of the ulna with avulsion fracture of the ulnar styloid
4 Comminuted fracture of the lower ulna metaphysis with or without styloid fracture

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