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 the stem of the implant
  • the prosthesis is always loose and the fracture is inherently unstable
• type II
  • oblique fractures around the stem
  • fracture pattern is stable, but prosthetic loosening is usually present
• type III
  • transverse fracture at the level of the tip of the stem
  • the fracture is unstable, but the prosthetic fixation is usually unaffected
• type IV
  • fracture distal to the implant
  • the fracture is unstable, but the prosthetic fixation is usually unaffected

See also

• periprosthetic fracture
• periprosthetic hip fracture classification systems