Individualized prediction of pedicle screw fixation strength with a finite element model

Jonas Widmer, Marie-Rosa Fasser, Eleonora Croci, José Spirig, Jess G. Snedeker and Mazda Farshad

Computer Methods in Biomechanics and Biomedical Engineering, 2020, vol. 23, issue 4, 155-167

Abstract: Pedicle screws are used for the treatment of a wide variety of spinal pathologies. A good screw holding power in bone is required for treatment success, but has so far not been predictable computationally. The goal of this study was to develop an automated tool able to predict patient-specific screw fixation strength through finite element simulation. We compared the simulation results with results from biomechanical pull-out tests performed on animal lumbar specimens. Experimental and simulation pull-out strengths were highly correlated (ρSpearman=0.821, p

Date: 2020
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DOI: 10.1080/10255842.2019.1709173

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