Imaging assessment of sacroiliac screw placement relative to the neuroforamen

Spine
B A GoldbergJ L Hadad

Abstract

Twenty-four cannulated sacroiliac screws were placed bilaterally into 12 cadaveric pelvi (12 titanium screws and 12 stainless-steel screws) and were imaged using conventional and multiplanar reconstructed computed tomography. To determine whether sacroiliac screw position assessment relative to the neuroforamen is enhanced by: 1) computed tomography using multiplanar reconstructions and 2) the use of titanium screws rather than stainless-steel screws. To the authors' knowledge, there have been no prior studies demonstrating the accuracy of multiplanar computed tomography compared with that of conventional (axial) tomography in determining the position of sacroiliac screws relative to the neuroforamen. Although titanium screws have been shown to have less scatter than stainless-steel screws, the effect of alloy composition on the radiographic accuracy of interpreting the screw position relative to the sacral neuroforamen is unknown. Screws were deliberately placed into: position A, in which the screw did not violate the neuroforamen; position B, in which the threads of the screw came within 3 mm of the neuroforamen; and position C, in which the screw clearly was nearly centered in the neuroforamen. The degrees of accuracy in ass...Continue Reading

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Citations

Jun 23, 2005·Der Unfallchirurg·F GebhardM Arand
Feb 7, 2003·Journal of Orthopaedic Trauma·Mark C ReillyFred F Behrens
Sep 1, 2007·Journal of Orthopaedic Trauma·Philip Wolinsky, Mark Lee
Sep 14, 2004·Computer Aided Surgery : Official Journal of the International Society for Computer Aided Surgery·S B AntekeierA L Malkani
Nov 27, 2008·Clinical Orthopaedics and Related Research·Jörn ZwingmannMichael Oberst

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