Sanders

SANDERS (Clinics Ortho, 290:87-95, 1993)
CT Scan evaluation from coronal and axial views
A – lateral
B – midline
C – medial (at sustentaculum tali)

1 – any number of fracture lines
All non-displaced, extra-articular fractures

2 – one fracture line
Two-part fracture of posterior facet (2A, 2B, or 2C)

3 – two fracture lines
Three-part, intra-articular fracture of posterior facet (3AB, 3AC, or 3BC)

4 – three fracture lines
Four-part, intra-articular fracture of posterior facet and sustentaculum, with comminution