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Fracture of femoral head - Pipkin classification

Pipkin classification system divides fractures of the femoral head into four basic types according to relation of fracture line to the fovea capitis femoris and associated injury of the femoral neck or the acetabulum. It was first published in 1957.

Type	Description
Type I	fracture line inferior to the fovea capitis femoris
Type II	fracture line superior to the fovea capitis femoris
Type III	type I or II with associated fracture of the femoral neck
Type IV	type I or II with associated fracure of the acetabulum (acetabular rim)

References:

1. Stannard JP, Schmidt AH, Kregor PJ. Surgical Treatment of Orthopaedic Trauma. Thieme; 2007.
2. Pipkin G. Treatment of Grade IV Fracture-Dislocation of the Hip A REVIEW. J Bone Joint Surg Am. 1957 Oct 1;39(5):1027–197.

Images:

$Pipkin classification of fractures of femoral head - type I$
Type I
$Pipkin classification of fractures of femoral head - type II$
Type II
$Pipkin classification of fractures of femoral head - type III$ $Pipkin classification of fractures of femoral head - type III$
Type III
$Pipkin classification of fractures of femoral head - type IV$ $Pipkin classification of fractures of femoral head - type IV$
Type IV