Classifies calcaneus fractures into two types – Joint Depression-type and Tongue-type.
Primary fracture line is oblique from lateral to medial through the posterior facet dividing it into two fragments
The secondary fracture line determines the type:
Tongue-type – secondary fracture line exits at the posterior aspect of the tuberosity, articular fragment remains attached to the tuberosity fragment
Joint-depression-type – secondary fracture line exits posterior to the posterior facet, articular fragment is separate from the tuberosity fragment
