Calcaneus fractures are most often classified by which system?

Calcaneus fractures are most often classified by which system?

• A. Hawkins classification
• B. Mason classification
• C. Sanders classification
• D. Essex-Lopresti

Answer: (C)

The main idea is that calcaneus fractures are most accurately and usefully classified with a CT-based system that specifically tracks the fracture lines within the posterior facet of the calcaneus. This system is designed for intra-articular fractures, where the exact pattern of joint involvement strongly influences treatment and prognosis. Why this classification matters: plain X-rays often miss the fine details of the posterior facet. A CT scan reveals the number and arrangement of articular fragments, which the classification uses to categorize the fracture. In this system, fractures are described by how many articular fragments there are in the posterior facet: non-displaced fractures; two-part fractures with a single articular break; three-part fractures with two articular breaks; and highly comminuted four-part or more fractures. As the number of articular fragments increases, the complexity of reconstruction rises and the prognosis tends to worsen, guiding surgical planning and expectations. Other classification schemes exist for different injuries—one system is used for talar neck fractures, another for radial head fractures, and another for a forearm injury pattern involving the interosseous membrane. They are not applicable to calcaneal fractures, which is why the Sanders scheme is the standard choice here.

The main idea is that calcaneus fractures are most accurately and usefully classified with a CT-based system that specifically tracks the fracture lines within the posterior facet of the calcaneus. This system is designed for intra-articular fractures, where the exact pattern of joint involvement strongly influences treatment and prognosis.

Why this classification matters: plain X-rays often miss the fine details of the posterior facet. A CT scan reveals the number and arrangement of articular fragments, which the classification uses to categorize the fracture. In this system, fractures are described by how many articular fragments there are in the posterior facet: non-displaced fractures; two-part fractures with a single articular break; three-part fractures with two articular breaks; and highly comminuted four-part or more fractures. As the number of articular fragments increases, the complexity of reconstruction rises and the prognosis tends to worsen, guiding surgical planning and expectations.

Other classification schemes exist for different injuries—one system is used for talar neck fractures, another for radial head fractures, and another for a forearm injury pattern involving the interosseous membrane. They are not applicable to calcaneal fractures, which is why the Sanders scheme is the standard choice here.