ESSEX-LOPRESTI (Br J Surg, 39:395-419, 1952)
Type 1 – Tongue type fracture. Fracture exiting the posterior aspect of the calcaneus.
1A – tuberosity fracture
1B – calcaneal-cuboid joint fracture

Type 2 – Joint depression fracture. Secondary fracture line involving STJ.
2A – non-displaced secondary fracture line exits posteriorly
2B – displaced secondary fracture line exits dorsally
2C – comminution