Classification
Grade I: Simple dislocation without fracture or with a chip from the acetabulum so small as to be of no consequence
Grade II: Dislocation with one or more large rim fragment, but with sufficient socket remaining to ensure stability after reduction
Grade III: Explosive or blast fracture with disintegration of the rim of the acetabulum, which produces gross instability
Grade IV: Dislocation with a fracture of the head or neck of the femur
Central Dislocations
Grade I: Linear or stellate fracture through the floor of the acetabulum but without appreciate dislocation
Grade II: Comminuted fracture with a mild to moderate central displacement of the femoral head and of the acetabular fragment
Grade III: Marked displacement of the fragments and protrusion of the head of the femur into the pelvis, with or without comminution of the superior portion of the acetabulum
Grade IV: Dislocation with an associated fracture of the head or neck of the femur
Explanation
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Figures
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Reference(s)
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