| Classification | Description | Notes |
| 0 | No comminution | |
| 1 | Small butterfly fragment | |
| 2 | Larger butterfly fragment, but >50% cortical contact between major proximal and distal fragments | |
| 3 | Large butterfly fragment with <50% cortical contact between major proximal and distal fragments | |
| 4 | Segmental comminution with no direct contact between major proximal and distal fragments |
Reference:
Winquist, R. A. and S. T. Hansen, Jr. (1980). “Comminuted fractures of the femoral shaft treated by intramedullary nailing.” Orthop Clin North Am 11(3): 633-648.