The effects of pre-stressed rods contoured by different bending techniques on posterior instrumentation of L4-L5 lumbar spine segment: A finite element study

Sengul, Emre; Özmen, Ramazan; Demir, Teyfik

doi:10.1177/09544119221096582

Cited by 3 publications

(1 citation statement)

References 50 publications

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“…17 Many isolated spine FE models have been developed to analyse the biomechanical response of the human spine. 18–20 Some studies have investigated the lumbar spine injuries under WBV in many aspects. 21–23 However, these FE models generally only considered the spine system and did not consider the influence of the surrounding tissue on the spine, which might be very important, especially for the dynamic characteristics of the spine.…”

Section: Introductionmentioning

confidence: 99%

Effect of whole-body vibration at different frequencies on the lumbar spine: A finite element study based on a whole human body model

Zhang

Guo

2022

Proc Inst Mech Eng H

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Many previous studies have found that occupational drivers commonly suffered from low back pain, and low back pain and degeneration of the intervertebral disc might be associated with vibration conditions. However, the biomechanical mechanisms of whole-body vibration that caused pain and injury were not clear. In this study, a validated whole human body finite element model was used, and vibration loads at frequencies of 3, 5, 7 and 9 Hz were loaded to evaluate the frequency effects on the spine. The results showed that the responses of the spine were strong at the 5 Hz vibration load. Vibration loads would produce alternating stresses and bulges in the annulus fibrosus and change the direction of the pressure in the nucleus pulposus. The posterior region of the intervertebral disc showed greater stress fluctuations than the anterior region. The Risk Factors showed that long-term exposure to whole-body vibrations at 5 and 7 Hz might have greater adverse effects on the spine. The findings of this study confirmed that vibrations near the resonance frequency of the human body would cause more injuries to the spine than other frequencies. Alternating stress and bulge might cause fatigue and the degeneration of the intervertebral disc, which might be the mechanisms of spinal injury caused by whole-body vibration, and the posterior regions of the intervertebral disc were more susceptible to degeneration. Some appropriate measures should be taken to reduce the adverse effects of whole-body vibration on spinal health.

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Section: Introductionmentioning

confidence: 99%

Effect of whole-body vibration at different frequencies on the lumbar spine: A finite element study based on a whole human body model

Zhang

Guo

2022

Proc Inst Mech Eng H

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Forcefully engaging rods into tulips with gap discrepancy leading to pedicle screw loosening—a biomechanical analysis using long porcine spine segments

Hsieh,

Lee,

Chen

et al. 2024

The Spine Journal

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The Effect of Vertical Whole-body Vibration With Different Frequencies on the Dynamic Biomechanics of Sitting Human Waist

Tang,

Zhang,

Dong

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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Previous studies have indicated a possible association between low back pain and intervertebral disc degeneration with prolonged exposure to vibration. However, the specific effects of different vibration frequencies under vertical sinusoidal excitation on the mechanisms of lumbar spine injury in seated individuals have not been clearly elucidated. Firstly, a validated whole-body finite element model was applied to perform modal analysis to investigate the modes that have a greater impact on lumbar spine vibration. Subsequently, employing transient dynamic analysis, it computed the time-domain responses of lumbar spine displacement, acceleration, stress, and pressure under sinusoidal excitation at different frequencies (1, 2, 3, …, and 8 Hz) in seated individuals. Finally, risk factors were applied to assess the impact of vibration frequencies on the lumbar spine. The modal analysis results indicated that the mode at 5.1 Hz significantly affected the vertical vibration of the lumbar spine. The time-domain response results showed that, compared to other frequencies, the intervertebral disc displacement, acceleration, stress, and pressure were larger under a 5 Hz vibration load. Risk factor assessments indicated that whole-body vibration near 5 Hz has a more adverse effect on the spine. It can be concluded that vertical vibrations close to 5 Hz can cause more damage to the lumbar spine than vibrations at other frequencies, increasing the risk of lumbar spine diseases. Therefore, appropriate measures should be taken to reduce or avoid the adverse effects of long-term exposure to whole-body vibrations at resonant frequencies on the health of the lumbar spine.

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The effects of pre-stressed rods contoured by different bending techniques on posterior instrumentation of L4-L5 lumbar spine segment: A finite element study

Cited by 3 publications

References 50 publications

Effect of whole-body vibration at different frequencies on the lumbar spine: A finite element study based on a whole human body model

Effect of whole-body vibration at different frequencies on the lumbar spine: A finite element study based on a whole human body model

Forcefully engaging rods into tulips with gap discrepancy leading to pedicle screw loosening—a biomechanical analysis using long porcine spine segments

The Effect of Vertical Whole-body Vibration With Different Frequencies on the Dynamic Biomechanics of Sitting Human Waist

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