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Journal article
In Vitro Comparison of Dynesys, PEEK, and Titanium Constructs in the Lumbar Spine
Advances in orthopedics, v 2015, pp 895931-8
01 Jan 2015
PMID: 26366303
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Introduction. Pedicle based posterior dynamic stabilization systems aim to stabilize the pathologic spine while also allowing sufficient motion to mitigate adjacent level effects. Two flexible constructs that have been proposed to act in such a manner, the Dynesys Dynamic Stabilization System and PEEK rod, have yet to be directly compared in vitro to a rigid Titanium rod. Methods. Human lumbar specimens were tested in flexion extension, lateral bending, and axial torsion to evaluate the following conditions at L4-L5: Intact, Dynesys, PEEK rod, Titanium rod, and Destabilized. Intervertebral range of motion, interpedicular travel, and interpedicular displacement metrics were evaluated from 3rd-cycle data using an optoelectric tracking system. Results. Statistically significant decreases in ROM compared to Intact and Destabilized conditions were detected for the instrumented conditions during flexion extension and lateral bending. AT ROM was significantly less than Destabilized but not the Intact condition. Similar trends were found for interpedicular displacement in all modes of loading; however, interpedicular travel trends were less consistent. More importantly, no metrics under any mode of loading revealed significant differences between Dynesys, PEEK, and Titanium. Conclusion. The results of this study support previous findings that Dynesys and PEEK constructs behave similarly to a Titanium rod in vitro.
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Details
- Title
- In Vitro Comparison of Dynesys, PEEK, and Titanium Constructs in the Lumbar Spine
- Creators
- Matthew S. Yeager - Allegheny Health NetworkDaniel J. Cook - Allegheny Health NetworkBoyle C. Cheng - Allegheny Health Network
- Publication Details
- Advances in orthopedics, v 2015, pp 895931-8
- Publisher
- Hindawi Publishing Group
- Number of pages
- 8
- Grant note
- Medtronic, Inc; Medtronic
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Surgery
- Web of Science ID
- WOS:000215175300021
- Scopus ID
- 2-s2.0-84959423230
- Other Identifier
- 991019168125604721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Orthopedics