Effect of instrumented fusion on the biomechanics of adjacent segment - an in vivo canine study

Tae Hong Lim, Avinash G. Patwardhan, Jung Hwa Hong, Howard S. An, Lee H. Riley, Scott Hodges, Michael R. Zindrick

Research output: Contribution to conferencePaper

Abstract

A canine in vivo study was performed to investigate if spinal fusion with instrumentation causes significant changes in the viscoelastic properties of the intervertebral disc above the fused segment. Load-displacement behavior of the lumbar spine measured by the flexibility test showed that a solid fusion occurred across the L5 to L7 segments, although no fusion occurred at L7-S1 segment. No visual change of disc degeneration was found in the L4-5 intervertebral disc of the experimental group as compared to the control group. Relaxation and cyclic loading tests demonstrated no significant changes in the viscoelastic properties of the L4-5 intervertebral disc between the control and experimental groups. These results showed that fusion of the L5-L7 segments did not significantly affect the viscoelastic properties of the adjacent L4-5 intervertebral disc at the end of 30 weeks.

Original languageEnglish (US)
Pages93-94
Number of pages2
StatePublished - Dec 1 1995
Externally publishedYes
EventProceedings of the 1995 ASME International Mechanical Congress and Exposition - San Francisco, CA, USA
Duration: Nov 12 1995Nov 17 1995

Other

OtherProceedings of the 1995 ASME International Mechanical Congress and Exposition
CitySan Francisco, CA, USA
Period11/12/9511/17/95

ASJC Scopus subject areas

  • Engineering(all)

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    Lim, T. H., Patwardhan, A. G., Hong, J. H., An, H. S., Riley, L. H., Hodges, S., & Zindrick, M. R. (1995). Effect of instrumented fusion on the biomechanics of adjacent segment - an in vivo canine study. 93-94. Paper presented at Proceedings of the 1995 ASME International Mechanical Congress and Exposition, San Francisco, CA, USA, .