Is it possible to estimate the compressive force in the lumbar spine from intradiscal pressure measurements? A finite element evaluation

Dreischarf, Marcel; Rohlmann, A.; Zhu, Rui; Schmidt, Hendrik; Zander, Thomas

doi:10.1016/j.medengphy.2013.03.007

Cited by 58 publications

(43 citation statements)

References 32 publications

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“…A major strength of the current study was our conversion of vertebral compressive force from the model to an estimated IDP using vertebral CSA and a previously published correction factor [54][55][56]. This conversion process allowed us to determine how accurately our model was predicting loading magnitude.…”

Section: Discussionmentioning

confidence: 99%

“…where F C is the compressive load in the axial direction of the vertebral body predicted by our model, CSA Vert is the CSA of the vertebral body, and 0.66 is a correction factor for translating between IDP and compressive loading [54][55][56]. Although the correction factor has only been computed for lumbar intervertebral disks, we also used this same correction factor to estimate IDP in the thoracic spine, because no study that we are aware of has determined a thoracic-specific correction factor.…”

Section: Validation Of Vertebral Compressive Loading Andmentioning

confidence: 99%

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Development and Validation of a Musculoskeletal Model of the Fully Articulated Thoracolumbar Spine and Rib Cage

Bruno

Bouxsein

Anderson

2015

Journal of Biomechanical Engineering

163

168

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We developed and validated a fully articulated model of the thoracolumbar spine in OPENSIM that includes the individual vertebrae, ribs, and sternum. To ensure trunk muscles in the model accurately represent muscles in vivo, we used a novel approach to adjust muscle cross-sectional area (CSA) and position using computed tomography (CT) scans of the trunk sampled from a community-based cohort. Model predictions of vertebral compressive loading and trunk muscle tension were highly correlated to previous in vivo measures of intradiscal pressure (IDP), vertebral loading from telemeterized implants and trunk muscle myoelectric activity recorded by electromyography (EMG).

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Section: Discussionmentioning

confidence: 99%

Section: Validation Of Vertebral Compressive Loading Andmentioning

confidence: 99%

Development and Validation of a Musculoskeletal Model of the Fully Articulated Thoracolumbar Spine and Rib Cage

Bruno

Bouxsein

Anderson

2015

Journal of Biomechanical Engineering

163

168

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show abstract

“…The geometry was taken from CT data, and the Brought to you by | Carleton University OCUL Authenticated Download Date | 7/23/15 10:18 AM size and orientation were adapted to average values [2,3,14,15,17]. The lumbar model has been validated previously for intervertebral rotations and intradiscal pressure using moments and a follower load [7,24,25]. The thoracic spine and the pelvis were assumed to be rigid, and their bony structures served as attachment points for the muscles.…”

Section: Modelsmentioning

confidence: 99%

Discrepancies in anthropometric parameters between different models affect intervertebral rotations when loading finite element models with muscle forces from inverse static analyses

Zhu¹,

Rohlmann

2014

Biomedical Engineering / Biomedizinische Technik

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In only a few published finite element (FE) simulations have muscle forces been applied to the spine. Recently, muscle forces determined using an inverse static (IS) model of the spine were transferred to a spinal FE model, and the effect of methodical parameters was investigated. However, the sensitivity of anthropometric differences between FE and IS models, such as body height and spinal orientation, was not considered. The aim of this sensitivity study was to determine the influence of those differences on the intervertebral rotations (IVRs) following the transfer of muscle forces from an IS model to a FE model. Muscle forces were estimated for 20° flexion and 10° extension of the upper body using an inverse static musculoskeletal model. These forces were subsequently transferred to a nonlinear FE model of the spino-pelvic complex, which includes 243 muscle fascicles. Deviations of body height (±10 cm), spinal orientation in the sagittal plane (±10°), and body weight (±10 kg) between both models were intentionally generated, and their influences on IVRs were determined. The changes in each factor relative to their corresponding reference value of the IS model were calculated. Deviations in body height, spinal orientation, and body weight resulted in maximum changes in the IVR of 19.2%, 26% and 4.2%, respectively, relative to T12-S1 IVR. When transferring muscle forces from an IS to a FE model, it is crucial that both models have the same spinal orientation and height. Additionally, the body weight should be equal in both models.

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“…Other models include the entire lumbar section L1-L5 or L1 -S1 (Ayari et al 2009;Ayari, Thomas, and Doré 2011;Dreischarf et al 2013Dreischarf et al , 2014Rohlmann et al 2007Rohlmann et al , 2010Schmidt et al 2010). The most comprehensive model was described by Wang et al (2010).…”

Section: Introductionmentioning

confidence: 99%

“…Other investigations aim to compare computed compressive forces with in vivo intradiscal pressure measurements (Dreischarf et al 2013) or to determine the influence of geometry (disc height, endplate width, etc.) on the response of numerical models (Niemeyer, Wilke, and Schmidt 2012).…”

Section: Introductionmentioning

confidence: 99%

Measures of internal lumbar load in professional drivers – the use of a whole-body finite-element model for the evaluation of adverse health effects of multi-axis vibration

Schust¹,

Menzel²,

Hofmann³

et al. 2014

Ergonomics

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Is it possible to estimate the compressive force in the lumbar spine from intradiscal pressure measurements? A finite element evaluation

Cited by 58 publications

References 32 publications

Development and Validation of a Musculoskeletal Model of the Fully Articulated Thoracolumbar Spine and Rib Cage

Development and Validation of a Musculoskeletal Model of the Fully Articulated Thoracolumbar Spine and Rib Cage

Discrepancies in anthropometric parameters between different models affect intervertebral rotations when loading finite element models with muscle forces from inverse static analyses

Measures of internal lumbar load in professional drivers – the use of a whole-body finite-element model for the evaluation of adverse health effects of multi-axis vibration

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