A biomechanical evaluation of magnetic resonance imaging-compatible wire in cervical spine fixation

Gaetano J. Scuderi, Steven S. Greenberg, Dan S. Cohen, Loren L. Latta, Frank J. Eismont

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

In a bovine cervical spine model, the ultimate and fatigue strengths as well as relative magnetic resonance imaging artifact produced by titanium, cobalt chrome, and stainless-steel wires in various gauges were assessed. Single-cycle and fatigue strength of wire constructs were measured. Although larger wires generally had greater static strength, fatigue strength was mixed. Sixteen-gauge titanium, and all stainless-steel models (22-gauge braided, 18-gauge, and Songer cable) withstood 10,000 cycles without failure, whereas all other constructs rarely could withstand a similar 10,000 cycles. Magnetic resonance imaging was performed on calf cervical spines instrumented with the various materials. Titanium exhibited the least artifact, stainless- steel showed the greatest artifact, and cobalt chrome an intermediate amount. Although titanium wire produces the least amount of magnetic resonance imaging artifact, it remains a poor choice for implant fixation because its notch sensitivity reduces its fatigue resistance compared with stainless steel, which remains the more dependable choice.

Original languageEnglish (US)
Pages (from-to)1991-1994
Number of pages4
JournalSPINE
Volume18
Issue number14
DOIs
StatePublished - Oct 1993

Keywords

  • cervical spine fixation
  • magnetic resonance imaging
  • wires

ASJC Scopus subject areas

  • Physiology
  • Clinical Neurology
  • Orthopedics and Sports Medicine

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