Journal article
Lumbar Intrafacet Bone Dowel Fixation
Neurosurgery, v 76(4), pp 470-478
01 Apr 2015
PMID: 25621985
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
BACKGROUND:The efficacy of intrafacet bone dowels in promoting lumbar fusion has not been established. A recently published study indicates a low fusion rate, along with device migration.OBJECTIVE:To evaluate the mechanical stability of 2 lumbar facet fixation technologies before and after repeated cyclic loading.METHODS:Six human lumbar specimens were implanted with both types of allograft, one at L2-3 and the other at L4-5, on a randomized basis. All specimens were subjected to pure-moment flexibility testing before and after implantation and after 2500 and 5000 cycles of flexion-extension bending. Each specimen was scanned with computed tomography before and after cyclic loading to measure device migration.RESULTS:Only dowel 1 resulted in a statistically significant reduction in flexion-extension range of motion at the treatment level. This reduction was significant at baseline testing (P = .03) and after 2500 cycles of flexion-extension loading (P = .048) but was not significant after 5000 cycles of loading. One of the bone dowels extruded posteriorly out of the joint space during baseline axial torsion flexibility testing, which was before any cyclic loading.CONCLUSION:The data obtained in this study do not indicate efficacy of fixation for cylindrical bone dowels in the lumbar facet joint. Significant fixation was detected only for one of the devices and was no longer present after a relatively short duration of repeated loading. Furthermore, considerable magnitudes of device migration were detected.ABBREVIATIONS:AC, axial compressionAT, axial torsionFE, flexion-extensionFSU, functional spinal unitLB, lateral bendingLED, light-emitting diodeROM, range of motion
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Details
- Title
- Lumbar Intrafacet Bone Dowel Fixation
- Creators
- Daniel J. Cook - Allegheny Health NetworkMatthew S. Yeager - Allegheny Health NetworkMichael Y. Oh - Allegheny Health NetworkBoyle C. Cheng - Department of Neurosurgery, Allegheny Health Network, Drexel University College of Medicine, Pittsburgh, Pennsylvania
- Publication Details
- Neurosurgery, v 76(4), pp 470-478
- Publisher
- Lippincott Williams & Wilkins
- Number of pages
- 9
- Grant note
- Olympus Biotech Corp.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- SOM Dean - Research Administration; Surgery
- Web of Science ID
- WOS:000351613000040
- Scopus ID
- 2-s2.0-84924959307
- Other Identifier
- 991019168955704721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Clinical Neurology
- Surgery