Pipkin femoral head fracture classification

Pipkin classification is the most commonly used classification for femoral head fractures, which are uncommon but are associated with hip dislocations.
Classification
- type I: fracture inferior to the fovea capitis, a small fracture not involving the weightbearing surface
- type II: fracture extending superior to the fovea capitis, a large fracture involving the weightbearing surface
- type III: type I or II fracture with a fracture of the femoral neck, has an increased risk of avascular necrosis
- type IV: type I or II fracture with a fracture of the acetabular wall, usually the posterior wall
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