Lumbar facet joint and intervertebral disc loading during simulated pelvic obliquity

Abstract Background context Intervertebral disc and facet joints are the two primary load-bearing structures of the lumbar spine, and altered loading to these structures may be associated with frontal plane spinal deviations. Purpose To determine the load on the lumbar facet joint and intervertebral...

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Bibliographic Details
Published in:The spine journal 2013-11, Vol.13 (11), p.1581-1589
Main Authors: Popovich, John M., PhD, DPT, ATC, Welcher, Judson B., PhD, Hedman, Thomas P., PhD, Tawackoli, Wafa, PhD, Anand, Neel, MD, Chen, Thomas C., MD, PhD, Kulig, Kornelia, PhD, PT
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
Biomechanical Phenomena - physiology
Biomechanics
Disc pressure
Facet joint
Humans
Intervertebral Disc - physiology
Lumbar Vertebrae - physiology
Middle Aged
Orthopedics
Pelvic obliquity
Pressure
Range of Motion, Articular
Spinopelvic alignment
Weight-Bearing - physiology
Zygapophyseal Joint - physiology
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Summary:Abstract Background context Intervertebral disc and facet joints are the two primary load-bearing structures of the lumbar spine, and altered loading to these structures may be associated with frontal plane spinal deviations. Purpose To determine the load on the lumbar facet joint and intervertebral disc under simulated frontal plane pelvic obliquity combined loading, an in vitro biomechanical study was conducted. Study design/setting An in vitro biomechanical study using a repeated-measures design was used to compare L4–L5 facet joint and intervertebral disc loading across pure moment and combined loading conditions. Methods Eight fresh-frozen lumbosacral specimens were tested under five loading conditions: flexion/extension, lateral bending, axial rotation using pure moment bending (±10 Nm), and two additional tests investigating frontal plane pelvic obliquity and axial rotation (sacrum tilted left 5° and at 10° followed by a ±10-Nm rotation moment). Three-dimensional kinematics, facet load, and intradiscal pressures were recorded from the L4–L5 functional spinal unit. Results Sagittal and frontal plane loading resulted in significantly smaller facet joint forces compared with conditions implementing a rotation moment (p
ISSN:1529-9430
1878-1632
DOI:10.1016/j.spinee.2013.04.011