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Multi-Axis Testing of an Elastomeric Prosthetic Lumbar Disc Compared to a Cadaveric Human Disc

[+] Author Affiliations
Glen Njus, Anand Parikh, Snehal Chokhandre, John Konicek

University of Akron, Akron, OH

James Price, Richard Navarro

Theken Disc, LLC, Akron, OH

Paper No. BioMed2007-38087, pp. 143-144; 2 pages
  • ASME 2007 2nd Frontiers in Biomedical Devices Conference
  • ASME 2007 2nd Frontiers in Biomedical Devices
  • Irvine, California, USA, June 7–8, 2007
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4266-5 | eISBN: 0-7918-3797-1
  • Copyright © 2007 by ASME


As motion preservation implants begin to replace fusion devices for lumbar degenerative disc disease, preclinical mechanical testing of these devices is critical to predicting their in vivo safety and efficacy. ISO and ASTM standards committees have tried for years to develop a universal test standard for all lumbar disc implants. The eDisc, an elastomeric/titanium disc replacement, is substantially different in its mechanical performance than the Synthes ProDisc or J&J Charite disc. These discs rely on ball and socket motion about a fixed or moving center or rotation to provide motion restoration in 3 to 5 axes. In contrast, the eDisc has viscoelastic motion in 3 translation and 3 rotational directions, just as in the natural human disc.

Copyright © 2007 by ASME



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