Fracture classifications
| Classification | Navicular (Saxena et al19) | Fifth metatarsal (Torg) |
|---|---|---|
| T1 | Dorsal cortical fracture | No intramedullary sclerosis, a fracture line with sharp margins, no widening or radiolucency, minimum cortical hypertrophy or evidence of periosteal reaction |
| T2 | Dorsal fracture into navicular body | Fracture line involving both cortices, associated periosteal new bone; a widened fracture line with adjacent radiolucency and evidence of intramedullary sclerosis |
| T3 | Fracture extends to second cortex | Wide fracture line with periosteal new bone and radiolucency, complete obliteration of the medullary canal at the fracture site by sclerotic bone |