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Expulsion Testing of an Anterior Cervical Intervertebral Fusion Cage: Factors Affecting Pull Out Resistance

[+] Author Affiliations
Vijay K. Goel, David Dick, Hiroshi Kuroki, Nabil Ebraheim

University of Toledo, Toledo, OH

Paper No. IMECE2002-32632, pp. 395-396; 2 pages
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Advances in Bioengineering
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-3650-9 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME


Factors affecting the expulsion resistance of an anterior cervical discectomy and fusion (ACDF) device in a cadaver model were investigated. Two specimen specific properties were considered; bone mineral density (BMD), and donor age. Also, two surgical procedures were used, representing two different degrees of destabilization of the intervertebral joint. Expulsion forces averaged 176 N (S.D. 60 N) for all specimens. No statistically significant difference in expulsion force was found between the specimens in the two surgical groups. However, expulsion force showed significant correlation to both BMD and donor age, with correlation coefficients of 0.81 and −0.83 respectively.

Copyright © 2002 by ASME



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