| Classification | Description | Notes |
| Type 1 | Nondisplaced | Regardless of the number of fracture fragments |
| Type 2 | Two part fractures | A- Lateral third
B- Central third C- Medial Third |
| Type 3 | Three part fractures | Two of the above |
| Type 4 | Highly comminuted |
Use coronal image with the widest undersurface of the posterior facet of the talus. Lines A and B separate the calcaneus into medial, central and lateral columns. Line C corresponds to the medial edge of the posterior facet of the talus, separating the sustentaculum from the posterior facet.
References:
Daftary, A., et al. (2005). “Fractures of the Calcaneus: A Review with Emphasis on CT.” Radiographics 25: 1215-1226.
Sanders, R., et al. (1993). “Operative treatment in 120 displaced intraarticular calcaneal fractures. Results using a prognostic computed tomography scan classification.” Clin Orthop Relat Res(290): 87-95.