Sanders classification
The Sanders classification is a system of categorizing intra-articular calcaneal fractures based on the number of articular fragments seen on the coronal CT image at the widest point of the posterior facet.
Classification
| Type | Description |
| I | Nondisplaced posterior facet |
| II | Displaced with one fracture line in the posterior facet |
| III | Displaced with two fracture lines in the posterior facet |
| IV | Comminuted with more than three fracture lines in the posterior facet |