Score: Pipkin classification
Use: Femoral head fractures
Type I
Fracture inferior to fovea centralis
Type II
Fracture superior to fovea centralis
Type III
Type I or II + femoral neck fracture
Type IV
Type I, II or III + acetabular fractureReference
Classification and Diagnosis in Orthopaedic Trauma. Editors: Rahij Anwar, Kenneth W. R. Tuson, Shah Alam Khan. Cambridge University Press, 2008