Biomechanical stability of transverse connectors in the setting of a thoracic pedicle subtraction osteotomy

The Spine Journal : Official Journal of the North American Spine Society
Ronald A LehmanAnton E Dmitriev

Abstract

Transverse connectors (TCs) are often used to improve the rigidity of posterior spinal instrumentation as previous investigations have suggested that TCs enhance torsional rigidity in long-segment thoracic constructs. Posterior osteotomies, such as pedicle subtraction osteotomy (PSO), are used in severe thoracic deformities and provide a significant amount of correction; as a consequence, however, PSOs also induce three-column spinal instability. In theory, augmentation of longitudinal constructs with TC after a thoracic PSO may provide additional rigidity, but the concept has not been previously evaluated. To evaluate the biomechanical contribution of TC to the rigidity of a long-segment pedicle screw-rod construct after a thoracic PSO. An in vitro fresh-frozen human cadaveric biomechanical analysis. Seven human cadaveric thoracic spines were prepared and instrumented from T4-T10 with bilateral pedicle screws/rods and a PSO was performed at T7. Intact range of motion (ROM) testing was performed with nondestructive loading and analyzed by loading modality (axial rotation [AR], flexion/extension [FE], and lateral bending [LB]). Range of motion analysis was performed in the unaugmented construct, the construct augmented with one ...Continue Reading

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Citations

Feb 26, 2016·International Orthopaedics·Iulian PopaDan V Poenaru
May 3, 2019·Journal of Biomechanical Engineering·Anoli A ShahVijay Goel
Oct 4, 2020·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Frédéric CornazMazda Farshad
May 10, 2018·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Luigi La BarberaHans-Joachim Wilke
Aug 16, 2019·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Luigi La BarberaMarco Brayda-Bruno
Aug 5, 2017·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Benny T DahlBrandon S Bucklen
Feb 13, 2021·Scientific Reports·Luigi La BarberaLuca Cristofolini
Jun 15, 2021·Frontiers in Bioengineering and Biotechnology·Meike GierigDominik Saul

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