Score: Johansson classification

Use: Femoral prosthesis fracture

Type I

Fracture proximal to the tip of the prosthesis with the stem still in contact with the medullary cavity

Type II

Fracture extending distal to the tip of the prosthesis with dislodgement of the stem from the medullary cavity of the distal fragment

Type III

Fracture distal to the tip of the stem of the prosthesis

Reference

Classification and Diagnosis in Orthopaedic Trauma. Editors: Rahij Anwar, Kenneth W. R. Tuson, Shah Alam Khan. Cambridge University Press, 2008