Biomechanical analysis of a customized lumbar interspinous spacer based on transfacetopedicular screw fixation: A finite element study

Zhao, Gaiping; Wang, Xiaoyu; Liu, Tielong; Dong, Lianfeng

doi:10.1016/j.medengphy.2022.103850

Cited by 2 publications

(2 citation statements)

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“…Gazzeri reported, "The ISP analyses increase the risk of fracture of the spiny process". The prosthesis avoids Comparing the results with those of other researchers that have used the FEM to visualize the behavior of various ISP [32,[50][51][52][53][54], it is concluded that the results are satisfactory since, in these studies, the maximum forces are generated in the prosthesis and the deformations are reduced. Therefore, the prostheses end up providing excellent stability to the spine.…”

Section: Discussionmentioning

confidence: 73%

“…The model's validation was performed considering the behavior of the FEM model in relaxed standing without the ISP versus the loads and ROMs used by other researchers. In the literature, the forces employed in experiments and simulations vary from 220 N to 1200 N [32,[50][51][52][53]. The displacements coincide with other research [54].…”

Section: Model Validationmentioning

confidence: 75%

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Numerical Assessment of Interspinous Spacers for Lumbar Spine

Hernández-Ortega,

Torres-SanMiguel,

Alcántara-Arreola

et al. 2023

Prosthesis

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Interspinous spacers are a minimally invasive surgical device for treating degenerative lumbar diseases, limiting spinal extension, and decreasing pressures within the disc and facets, relieving symptoms caused by lumbar spinal stenosis. This work uses the finite element method to calculate the stresses and deformations of an interspinous spacer with steel wire clamping. The cables also provide an easier way to set up the device. The reconstruction of the model was undertaken by computerized tomography, considering a person with average Mexican height (1.64 m) and a mass index grade of 2 (108 kg). The maximum movements reported in the literature were used for the range of motion. The interspinous spacer increases in a ratio of 2.7 times the stresses. Still, these stresses are generated in the prosthesis, which causes the vertebrae to be relieved since the forces and pressures are reduced. Deformations decrease by 53% with the reduction of the range of motion. Therefore, the prosthesis provides excellent stability for the vertebrae.

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