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A Multi-Directional Tribo-System: Testing the Wear of UHMWPE Under Sliding, Rolling, and Rotation

[+] Author Affiliations
Eli W. Patten, Perry M. Johnson, Timothy Hong, A. J. Almaguer, Lisa A. Pruitt

University of California at Berkeley, Berkeley, CA

Matthew E. Carney

University of California at Berkeleyÿ, Berkeley, CA

Paper No. SBC2011-53616, pp. 1177-1178; 2 pages
  • ASME 2011 Summer Bioengineering Conference
  • ASME 2011 Summer Bioengineering Conference, Parts A and B
  • Farmington, Pennsylvania, USA, June 22–25, 2011
  • Conference Sponsors: Bioengineering Division
  • ISBN: 978-0-7918-5458-7
  • Copyright © 2011 by ASME


A tribological testing system with up to four degrees of motion has been designed and built to simulate the wear of materials used in joint replacements. The machine is versatile enough to test simple pin-on-disk contact in planar sliding as well as ball-on-flat contact with more complex rotation and rolling motions. A wide range of materials, loads, and specimen configurations can be tested with this machine, making it a powerful tool for hypothesis-driven research. This tribosystem is robust, customizable, cost effective, and offers the first opportunity to investigate the fundamental wear mechanisms that arise from the four degrees of motion in total knee replacements. Basic design features, advantages, and preliminary validation will be discussed.

Copyright © 2011 by ASME
Topics: Rotation , Wear , Testing



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