Cargando…
The Comprehensive Biomechanics and Load-Sharing of Semirigid PEEK and Semirigid Posterior Dynamic Stabilization Systems
Alternatives to conventional rigid fusion have been proposed for several conditions related to degenerative disc disease when nonoperative treatment has failed. Semirigid fixation, in the form of dynamic stabilization or PEEK rods, is expected to provide compression under loading as well as an inter...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi Publishing Corporation
2013
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3747612/ https://www.ncbi.nlm.nih.gov/pubmed/23984077 http://dx.doi.org/10.1155/2013/745610 |
_version_ | 1782280961902247936 |
---|---|
author | Sengupta, D. K. Bucklen, Brandon McAfee, Paul C. Nichols, Jeff Angara, Raghavendra Khalil, Saif |
author_facet | Sengupta, D. K. Bucklen, Brandon McAfee, Paul C. Nichols, Jeff Angara, Raghavendra Khalil, Saif |
author_sort | Sengupta, D. K. |
collection | PubMed |
description | Alternatives to conventional rigid fusion have been proposed for several conditions related to degenerative disc disease when nonoperative treatment has failed. Semirigid fixation, in the form of dynamic stabilization or PEEK rods, is expected to provide compression under loading as well as an intermediate level of stabilization. This study systematically examines both the load-sharing characteristics and kinematics of these two devices compared to the standard of internal rigid fixators. Load-sharing was studied by using digital pressure films inserted between an artificially machined disc and two loading fixtures. Rigid rods, PEEK rods, and the dynamic stabilization system were inserted posteriorly for stabilization. The kinematics were quantified on ten, human, cadaver lumbosacral spines (L3-S1) which were tested under a pure bending moment, in flexion-extension, lateral bending, and axial rotation. The magnitude of load transmission through the anterior column was significantly greater with the dynamic device compared to PEEK rods and rigid rods. The contact pressures were distributed more uniformly, throughout the disc with the dynamic stabilization devices, and had smaller maximum point-loading (pressures) on any particular point within the disc. Kinematically, the motion was reduced by both semirigid devices similarly in all directions, with slight rigidity imparted by a lateral interbody device. |
format | Online Article Text |
id | pubmed-3747612 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Hindawi Publishing Corporation |
record_format | MEDLINE/PubMed |
spelling | pubmed-37476122013-08-27 The Comprehensive Biomechanics and Load-Sharing of Semirigid PEEK and Semirigid Posterior Dynamic Stabilization Systems Sengupta, D. K. Bucklen, Brandon McAfee, Paul C. Nichols, Jeff Angara, Raghavendra Khalil, Saif Adv Orthop Research Article Alternatives to conventional rigid fusion have been proposed for several conditions related to degenerative disc disease when nonoperative treatment has failed. Semirigid fixation, in the form of dynamic stabilization or PEEK rods, is expected to provide compression under loading as well as an intermediate level of stabilization. This study systematically examines both the load-sharing characteristics and kinematics of these two devices compared to the standard of internal rigid fixators. Load-sharing was studied by using digital pressure films inserted between an artificially machined disc and two loading fixtures. Rigid rods, PEEK rods, and the dynamic stabilization system were inserted posteriorly for stabilization. The kinematics were quantified on ten, human, cadaver lumbosacral spines (L3-S1) which were tested under a pure bending moment, in flexion-extension, lateral bending, and axial rotation. The magnitude of load transmission through the anterior column was significantly greater with the dynamic device compared to PEEK rods and rigid rods. The contact pressures were distributed more uniformly, throughout the disc with the dynamic stabilization devices, and had smaller maximum point-loading (pressures) on any particular point within the disc. Kinematically, the motion was reduced by both semirigid devices similarly in all directions, with slight rigidity imparted by a lateral interbody device. Hindawi Publishing Corporation 2013 2013-08-04 /pmc/articles/PMC3747612/ /pubmed/23984077 http://dx.doi.org/10.1155/2013/745610 Text en Copyright © 2013 D. K. Sengupta et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Sengupta, D. K. Bucklen, Brandon McAfee, Paul C. Nichols, Jeff Angara, Raghavendra Khalil, Saif The Comprehensive Biomechanics and Load-Sharing of Semirigid PEEK and Semirigid Posterior Dynamic Stabilization Systems |
title | The Comprehensive Biomechanics and Load-Sharing of Semirigid PEEK and Semirigid Posterior Dynamic Stabilization Systems |
title_full | The Comprehensive Biomechanics and Load-Sharing of Semirigid PEEK and Semirigid Posterior Dynamic Stabilization Systems |
title_fullStr | The Comprehensive Biomechanics and Load-Sharing of Semirigid PEEK and Semirigid Posterior Dynamic Stabilization Systems |
title_full_unstemmed | The Comprehensive Biomechanics and Load-Sharing of Semirigid PEEK and Semirigid Posterior Dynamic Stabilization Systems |
title_short | The Comprehensive Biomechanics and Load-Sharing of Semirigid PEEK and Semirigid Posterior Dynamic Stabilization Systems |
title_sort | comprehensive biomechanics and load-sharing of semirigid peek and semirigid posterior dynamic stabilization systems |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3747612/ https://www.ncbi.nlm.nih.gov/pubmed/23984077 http://dx.doi.org/10.1155/2013/745610 |
work_keys_str_mv | AT senguptadk thecomprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT bucklenbrandon thecomprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT mcafeepaulc thecomprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT nicholsjeff thecomprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT angararaghavendra thecomprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT khalilsaif thecomprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT senguptadk comprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT bucklenbrandon comprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT mcafeepaulc comprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT nicholsjeff comprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT angararaghavendra comprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems AT khalilsaif comprehensivebiomechanicsandloadsharingofsemirigidpeekandsemirigidposteriordynamicstabilizationsystems |