Lewis and Rorabeck classified femoral supracondylar fractures proximal to a knee replacement. The type of fracture can help determine the optimum management strategy. The authors are from the University of Western Ontario in Canada.
Exclusion: The fracture involves the shaft of the femur proximal to the knee prosthesis. Involvement of the condyles or femur around the stem is classified by another scheme.
Parameters:
(1) displacement of the fracture
(2) status of prosthesis
Displacement of Fracture
Status of Prosthesis
Type
undisplaced
stable
I
displaced
stable
II
NA
unstable (loose or failing or significant polyethylene wear)
III
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