Knee: Lewis & Rorabeck

Various classification systems for periprosthetic fractures of the distal femur are described in the literature. A comprehensive classification systems for periprosthetic distal femur fractures is the Lewis and Rorabeck Classification. Periprosthetic femoral fractures following a TKA which are usually treated with ORIF are Rorabeck Type I and Type II displaced fractures where the knee prosthesis is intact.[1]
   
 
[1] Rorabeck CH, Taylor JW. Classification of periprosthetic fractures complicating total knee arthroplasty. Orthop Clin North Am1999; 30:209-214