fracture of the cam mechanism of a posterior-stabilized total knee femoral component: a previously...

Fracture of the Cam Mechanism of a Posterior-Stabilized Total Knee Femoral Component: A Previously

Unrecognized Mode of Failure

by Louis S. Stryker, and David G. Lewallen

JBJS Case ConnectVolume 4(2):e51June 25, 2014

©2014 by The Journal of Bone and Joint Surgery, Inc.

Anteroposterior (left) and lateral (right) radiographs of the left total knee arthroplasty six weeks postoperatively.

Louis S. Stryker, and David G. Lewallen JBJS Case Connect 2014;4:e51


Radiography series demonstrating the ingrowth of the left total knee arthroplasty at sixty months.



Radiography series demonstrating the ingrowth of the left total knee arthroplasty at 9.75 years, showing a loose body in the posterior aspect of the knee.



Intraoperative photograph showing the absence of the posterior cam post.



Intraoperative photograph following the removal of the femoral component, showing the location of the posterior cam post.



The femoral component following removal with the broken posterior cam post.



The end-on aspect of the broken posterior cam post (left) and the inner aspect of the lateral femoral condyle from where it had fractured (right).



The lateral condyle fracture area showing the initiation region (85× magnification).



Anteroposterior (left) and lateral (right) radiographs of the left total knee arthroplasty at seven months postrevision.



fracture of the cam mechanism of a posterior-stabilized total knee femoral component: a previously...

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