| 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 |