TY - JOUR
T1 - A biomechanical evaluation of magnetic resonance imaging-compatible wire in cervical spine fixation
AU - Scuderi, Gaetano J.
AU - Greenberg, Steven S.
AU - Cohen, Dan S.
AU - Latta, Loren L.
AU - Eismont, Frank J.
PY - 1993/10
Y1 - 1993/10
N2 - 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.
AB - 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.
KW - cervical spine fixation
KW - magnetic resonance imaging
KW - wires
UR - http://www.scopus.com/inward/record.url?scp=0027517660&partnerID=8YFLogxK
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U2 - 10.1097/00007632-199310001-00011
DO - 10.1097/00007632-199310001-00011
M3 - Article
C2 - 8272948
AN - SCOPUS:0027517660
VL - 18
SP - 1991
EP - 1994
JO - Spine
JF - Spine
SN - 0362-2436
IS - 14
ER -