Corpectomy versus discectomy for the treatment of multilevel cervical spine pathology: a finite element model analysis

The Spine Journal : Official Journal of the North American Spine Society
Mozammil HussainGunnar B Andersson

Abstract

After multilevel fusions, construct failure because of pseudoarthrosis and instrumentation complications is a well-recognized clinical problem. Little is known about the biomechanics governing the cervical spine after different anterior reconstruction techniques, specifically the number of bone grafts and screws used and whether discectomies versus corpectomies have been performed. A few research groups have compared the efficacy of corpectomy and discectomy procedures under common testing conditions; however, no quantitative stress measurements at graft-end plate and bone-screw interfaces have been reported to date. To test the hypothesis that increasing the number of bone grafts and screws would yield a more stable construct and decrease the stresses at the graft-end plate and bone-screw interfaces. Stability of fusion constructs with three different multilevel reconstruction techniques. A previously validated C3-T1 intact finite element model was modified to evaluate three different anterior C4-C7 fusion models: a two-level corpectomy alone (one graft and four screws), a corpectomy-discectomy (two grafts and six screws), and a three-level discectomy alone (three grafts and eight screws). Two unicortical screws were placed pa...Continue Reading

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Citations

Jun 16, 2012·The Spine Journal : Official Journal of the North American Spine Society·Vijay K Goel, Hossein Elgafy
Jul 18, 2014·World Journal of Clinical Cases·Alessandro LandiRoberto Delfini

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