Finite element analysis of the influence of three‐joint spinal complex on the change of the intervertebral disc bulge and height

Szkoda-Poliszuk, Klaudia; Żak, Małgorzata; Pezowicz, Celina

doi:10.1002/cnm.3107

Cited by 15 publications

(18 citation statements)

References 53 publications

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“…Two main modeling trends can be distinguished in biomechanics: finite element method (FEM) and multibody system method (MBS). In the FEM models, such as in the work of [8], the components of the system are described as deformable structures composed of multiple finite elements. These models tend to describe the structures very accurately, both in terms of geometry and material behavior.…”

Section: Introductionmentioning

confidence: 99%

A Planar Model of an Ankle Joint with Optimized Material Parameters and Hertzian Contact Pairs

Borucka

Ciszkiewicz

2019

Materials

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The ankle is one of the most complicated joints in the human body. Its features a plethora of elements with complex behavior. Their functions could be better understood using a planar model of the joint with low parameter count and low numerical complexity. In this study, an accurate planar model of the ankle with optimized material parameters was presented. In order to obtain the model, we proposed an optimizational approach, which fine-tuned the material parameters of two-dimensional links substituting three-dimensional ligaments of the ankle. Furthermore, the cartilage in the model was replaced with Hertzian contact pairs. The model was solved in statics under moment loads up to 5 Nm. The obtained results showed that the structure exhibited angular displacements in the range of the ankle joint and that their range was higher in dorsiflexion than plantarflexion. The structure also displayed a characteristic ramp up of the angular stiffness. The results obtained from the optimized model were in accordance with the experimental results for the ankle. Therefore, the proposed method for fine-tuning the material parameters of its links could be considered viable.

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Section: Introductionmentioning

confidence: 99%

A Planar Model of an Ankle Joint with Optimized Material Parameters and Hertzian Contact Pairs

Borucka

Ciszkiewicz

2019

Materials

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“…In actual conditions, the foregoing translates into the diversified distribution of loads affecting intervertebral discs. Scientific information concerning spinal biomechanics and results of computeraided simulations by Joszko et al [7] and Szkoda-Poliszuk et al [21] justify the conclusion that the pelvic retroposition, imposing the straightening of the lower part of the lumbar segment of the spine, is responsible for the uniform loading of intervertebral discs and for the asymmetric loading of intervertebral discs in terms of the pelvic anteversion. In spite of the positive effect resulting from the straightening of the spine, it is necessary to pay attention to the generation of high values of reaction forces in the intervertebral joints being 1.5 times higher than those generated when the pelvic inclination angle amounted to 16°, whereas the lowest value (0.59 BW) was obtained for segment L5-S1.…”

Section: Discussionmentioning

confidence: 97%

The effect of the pelvis position in the sagittal plane on loads in the human musculoskeletal system

Michnik

Zadoń

Nowakowska-Lipiec

et al. 2020

Acta Bioeng Biomech

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Purpose: The research work aimed to perform the mathematical modelling-based assessment concerning the effect of the position of the pelvis in the sagittal plane on loads present in the musculoskeletal system in the standing position. Methods: The analysis of the effect of various positions of the pelvis was performed using the Free Posture Model in the AnyBody Modeling System software. Simulated positions involving various values of pelvis inclination ranged from the extreme pelvic retroposition (–7°) through normative values (0–23°) to the extreme pelvic anteversion (33°). Results: The lowest resultant reaction forces in the intervertebral joints recorded for an angle of inclination restricted within the range of 9–27° and segment L5–S1 amounted to less than 0.7 BW. A change in the pelvic inclination from the normative values towards retroposition or anteversion resulted in the increased muscular activity of the erector spinae, transverse abdominal muscles as well as internal and external oblique muscles. Regarding the lower limbs, changes in the activity were observed in the biceps femoris muscle, iliac muscle, gluteus minimus, gluteus medius and the gluteus maximus. Conclusion: The results obtained in the research-related tests confirmed that the pelvic inclination affects loads present in the musculoskeletal system. The abovenamed results will be used to develop therapeutic exercises aimed to reduce loads present in the musculoskeletal system. The aforesaid exercises will be used to teach participants how to properly position their pelvis and how to activate individual groups of muscles.

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“…Facet joints were assumed to be surface to surface. The material properties were assumed to be homogeneous and isotropic, the corresponding data were given in Table 1 33‐37 …”

Section: Methodsmentioning

confidence: 99%

“…The material properties were assumed to be homogeneous and isotropic, the corresponding data were given in Table 1. [33][34][35][36][37] The intact L1-L5 spine FE model was modified to simulate the transforaminal lumbar interbody fusion (TLIF) at L4-L5 lumbar level. The reason for choosing TLIF and the L4-L5 level is that TLIF may decrease the risks of the complications and provide better biomechanical stability, 38,39 and the prevalence of L4-L5 in individuals suffering from lumbar diseases is greater than other intervertebral disks.…”

Section: Fe Modeling and Materialsmentioning

confidence: 99%

Biomechanical role of osteoporosis in the vibration characteristics of human spine after lumbar interbody fusion

Guo

2020

Numer Methods Biomed Eng

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Lumbar vertebrae osteoporosis is the most common challenge for lumbar interbody fusion, and this challenge has been widely concerned by scholars for many years. However, under whole-body vibration, osteoporosis how to affect the vibration characteristics of the fusion lumbar spine, complications, and fusion outcomes is urgent to know. The L1-L5 finite element model of lumbar spine was modified to simulate the transforaminal lumbar interbody fusion model with the bilateral pedicle screw fixator at L4-L5 level. A 5 Hz, 40 N sinusoidal vertical load supplemented with a 400 N preload was used to simulate the vertical vibration of human body. The results showed that under wholebody vibration, osteoporosis of fused vertebrae may cause the adjacent segments more unstable and increase the risk of adjacent segment diseases, subsidence, cage failure, rod failure, and lumbar instability. Osteoporosis of the fused vertebrae may cause the vertebral cells an unstable, inhibited growth and lead to poorer fusion outcomes. The findings may assist us in understanding the effect of osteoporosis on the vibration characteristics of lumbar spine fusion and provide references to clinical treatments for lumbar interbody fusion and lumbar vertebrae osteoporosis.

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Finite element analysis of the influence of three‐joint spinal complex on the change of the intervertebral disc bulge and height

Cited by 15 publications

References 53 publications

A Planar Model of an Ankle Joint with Optimized Material Parameters and Hertzian Contact Pairs

A Planar Model of an Ankle Joint with Optimized Material Parameters and Hertzian Contact Pairs

The effect of the pelvis position in the sagittal plane on loads in the human musculoskeletal system

Biomechanical role of osteoporosis in the vibration characteristics of human spine after lumbar interbody fusion

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