Cooke and Newman classification

The Cooke and Newman classification of periprosthetic hip fractures is a modification of the Bethea classification proposed several years earlier.

  • type I: explosion type fracture, comminuted around stem of implant; prosthesis is always loose and fracture is inherently unstable
  • type II: oblique fractures around stem; fracture pattern is stable, but prosthetic loosening ia usually present
  • type III: transverse fracture at level of tip of stem; fracture is unstable, but prosthetic fixation is usually unaffected
  • type IV: fracture distal to implant; fracture is unstable, but prosthetic fixation is usually unaffected
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rID: 52719
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