Journal article
Spinal motion and intradiscal pressure measurements before and after lumbar spine instrumentation with titanium or PEEK rods
Journal of clinical neuroscience, Vol.21(4), pp.651-655
04/2014
DOI: 10.1016/j.jocn.2013.08.010
PMID: 24314848
Abstract
Spinal instrumentation and fusion have been incriminated as contributing to adjacent segment degeneration (ASD). It has been suggested that ASD results from increased range of motion and intradiscal pressure (IDP) adjacent to instrumentation. Posterior dynamic stabilization with polyetheretherketone (PEEK) rods has been proposed as potentially advantageous compared to rigid instrumentation with titanium (Ti) rods in reducing the incidence of ASD. We evaluated segmental motions in the cadaveric spine instrumented with PEEK or Ti rods from L3 to S1, as well as the adjacent segment motions and IDP at L1–2 and L2–3. Human cadaveric spines were potted at T12–L1 and S1–2. Spinal instrumentation from L3–S1 was accomplished using pedicle screws with either PEEK or Ti rods. Specimens were subjected to displacement controlled testing: 15° flexion, 15° extension, 10° lateral bending, and 5° right axial rotation using the MTS machine (MTS, Minneapolis, MN, USA). Intradiscal pressure was measured by placing pressure transducers into the intervertebral disc at L1–2 and L2–3. Spinal motion of L2 relative to L3, and L3 relative to S1 was tracked using a three dimensional motion analysis system. Instrumentation with PEEK and Ti rods was associated with a decrease in L3–S1 motion compared to the intact state that was significant in flexion (p=0.002), and extension (p=0.0075). Instrumentation with PEEK and Ti rods was associated with an increase in IDP at L1–2 that was significant in flexion (p=0.0028). Instrumentation with either PEEK or Ti rods resulted in decreased motion at the instrumented levels while increasing IDP at the adjacent level.
Details
- Title: Subtitle
- Spinal motion and intradiscal pressure measurements before and after lumbar spine instrumentation with titanium or PEEK rods
- Creators
- Kingsley Abode-Iyamah - Department of Neurosurgery, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52242, USASam Byeong Kim - Department of Biomedical Engineering, University of Iowa Hospitals and Clinics, Iowa City, IA, USANicole Grosland - Department of Biomedical Engineering, University of Iowa Hospitals and Clinics, Iowa City, IA, USARajinder Kumar - Department of Neurosurgery, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52242, USAMuhittin Belirgen - Department of Neurosurgery, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52242, USATae Hong Lim - Department of Biomedical Engineering, University of Iowa Hospitals and Clinics, Iowa City, IA, USAJames Torner - Department of Preventive Medicine, University of Iowa Hospitals and Clinics, Iowa City, IA, USAPatrick W Hitchon - Department of Neurosurgery, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52242, USA
- Resource Type
- Journal article
- Publication Details
- Journal of clinical neuroscience, Vol.21(4), pp.651-655
- DOI
- 10.1016/j.jocn.2013.08.010
- PMID
- 24314848
- NLM abbreviation
- J Clin Neurosci
- ISSN
- 0967-5868
- eISSN
- 1532-2653
- Publisher
- Elsevier Ltd
- Language
- English
- Date published
- 04/2014
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Epidemiology; Orthopedics and Rehabilitation; Surgery; Injury Prevention Research Center; Neurosurgery
- Record Identifier
- 9983996186902771
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