Influence of stem length on component flexion and posterior condylar offset in revision total knee arthroplasty

Because 50-mm stems resulted in about three degree hyperextension of the femoral component with respect to the SFAA compared to 100-mm or 150-mm stems, the longer stems do not alter the natural femoral flexion and a delay of the cam-post engagement may be avoided. Further, a better reconstruction of the PCO may be archived with the use of longer stems.