caa a22 4500 445833122 CHVBK 20180317145322.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s00586-011-1746-1 doi (NATIONALLICENCE)springer-10.1007/s00586-011-1746-1 Posterior spinal instrumentation: biomechanical study on the role of rods on hardware response to axial load [Elektronische Daten] [Giuseppe Gioia, Celeste Scotti, Davide Mandelli, Giuseppe Sala] Posterior spinal instrumentation is frequently used for the treatment of spine disorders. Importantly, different requirements have to be considered for the optimal use of these systems in various clinical scenarios. In this work, we focused on the role of rods diameter on hardware's stiffness. For this purpose, we established an in vitro model and compared the response to axial load of a posterior stabilization system, characterized by rods of different diameter (4, 5, 6mm), with that of Dynesys®. Intuitively, the higher the stiffness of the hardware, the lower the load is transferred to the disc. However, the 4 hardware tested showed a different trend in the response to the load regimens: when increasing the load, more flexible systems display a progressive reduction in the percentage of load which is transferred to the disc while more rigid system display the opposite trend. Considering that the load which is transferred, and not by-passed by the hardware, influences the healing of a fracture; the integration of a bone graft or a cage; the fusion process, these data have a relevant impact on clinical practice and highlight features that have to be considered in the choice for the optimal posterior spinal instrumentation. Springer-Verlag, 2011 Posterior spinal instrumentation nationallicence Dynamic stabilization nationallicence Biomechanics nationallicence In vitro testing nationallicence Gioia Giuseppe Department of Orthopaedics and Traumatology, San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy aut Scotti Celeste Residency Program in Orthopaedics and Traumatology, Gaetano Pini Orthopaedic Institute, Università degli Studi di Milano, Piazza A. Ferrari 1, 20122, Milan, Italy aut Mandelli Davide Department of Orthopaedics and Traumatology, San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy aut Sala Giuseppe Department of Aerospace Engineering, Politecnico di Milano, Via La Masa 34, 20156, Milan, Italy aut European Spine Journal Springer-Verlag 20(2011-05-01), 3-7 0940-6719 20<3 2011 20 586 https://doi.org/10.1007/s00586-011-1746-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00586-011-1746-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gioia Giuseppe Department of Orthopaedics and Traumatology, San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy aut NATIONALLICENCE 700 1- Scotti Celeste Residency Program in Orthopaedics and Traumatology, Gaetano Pini Orthopaedic Institute, Università degli Studi di Milano, Piazza A. Ferrari 1, 20122, Milan, Italy aut NATIONALLICENCE 700 1- Mandelli Davide Department of Orthopaedics and Traumatology, San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy aut NATIONALLICENCE 700 1- Sala Giuseppe Department of Aerospace Engineering, Politecnico di Milano, Via La Masa 34, 20156, Milan, Italy aut NATIONALLICENCE 773 0- European Spine Journal Springer-Verlag 20(2011-05-01), 3-7 0940-6719 20<3 2011 20 586 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer