Contact stress analysis of the conforming post-cam mechanism in posterior-stabilized total knee arthroplasty.

Abstract

The present study evaluated the effects of extent of conformity of post-cam design on contact area and stress at post-cam mechanism using 4 different posterior-stabilized prostheses. TRAC and Alpina with full-conformed post-cams exhibited the largest contact area at 90 degrees and 120 degrees . PFC sigma RPF with partial conformed post-cam had the largest contact area at 150 degrees . Scorpio NRG with less conformed post-cam had smaller contact area than the others. Lifting of femoral component decreased contact area and increased contact stress of TRAC and Alpina. Recent modifications of post-cam design have increased contact area, contributing to lower contact stress. None of these prostheses exhibited constant low contact stress throughout flexion. Further modifications of post-cam mechanism are necessary to provide lower contact stress throughout deep knee flexion.

DOI: 10.1016/j.arth.2007.05.023
010020020132014201520162017
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@article{Akasaki2008ContactSA, title={Contact stress analysis of the conforming post-cam mechanism in posterior-stabilized total knee arthroplasty.}, author={Yukio Akasaki and Shuichi Matsuda and Takeshi Shimoto and Hiromasa Miura and Hidehiko Higaki and Yukihide Iwamoto}, journal={The Journal of arthroplasty}, year={2008}, volume={23 5}, pages={736-43} }