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Back| Classification | Characteristics |
|---|---|
| Type I | All non-displaced fractures |
| Type II | Two-part fractures: subdivided into IIA, IIB, and IIC based on fracture location |
| Type III | Three-part fractures: subdivided into IIIAB, IIIAC, and IIIBC based on fracture location. Typically has a central compression fracture line |
| Type IV | Four-part fractures: includes all fracture lines, i.e., IVABC fractures |
| Note: There may be some degree of error in classification due to incorrect selection of the coronal plane (the widest part of the posterior facet of the calcaneus, which usually clearly shows the sustentaculum tali). Additionally, there may be some degree of error in determining the number of fracture lines. | |
Explanation
The classification of calcaneal fractures is mainly based on the fracture morphology shown on coronal CT. On the coronal plane, the widest part of the posterior facet of the calcaneus is selected and divided into three parts: A, B, and C, representing the location of the fracture lines. Thus, there can be four fracture fragments, three joint surface fracture fragments, and two sustentaculum tali fracture fragments.
Calcaneal fractures are often caused by high-energy impact, most commonly from a fall from a height landing on the heel.
