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In Vitro Comparison of Dynesys, PEEK, and Titanium Constructs in the Lumbar Spine
Joint Authors
Yeager, Matthew S.
Cook, Daniel J.
Cheng, Boyle C.
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-08-17
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Yeager, Matthew S.& Cook, Daniel J.& Cheng, Boyle C.. 2015. In Vitro Comparison of Dynesys, PEEK, and Titanium Constructs in the Lumbar Spine. Advances in Orthopedics،Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1053823
Modern Language Association (MLA)
Yeager, Matthew S.…[et al.]. In Vitro Comparison of Dynesys, PEEK, and Titanium Constructs in the Lumbar Spine. Advances in Orthopedics No. 2015 (2015), pp.1-8.
https://search.emarefa.net/detail/BIM-1053823
American Medical Association (AMA)
Yeager, Matthew S.& Cook, Daniel J.& Cheng, Boyle C.. In Vitro Comparison of Dynesys, PEEK, and Titanium Constructs in the Lumbar Spine. Advances in Orthopedics. 2015. Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1053823
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1053823