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
- Cooke PH, Newman JH. Fractures of the femur in relation to cemented hip prostheses. The Journal of bone and joint surgery. British volume. 70 (3): 386-9. Pubmed