Porcine spine finite element model: a complementary tool to experimental scoliosis fusionless instrumentation

Hachem, Bahe; Aubin, Carl‐Éric; Parent, Stefan

doi:10.1007/s00586-016-4940-3

Cited by 7 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…First, it is a long-segment model based on CT images from a postoperative patient. In the past spinal FE studies, the authors always developed an intact model from a healthy volunteer first and then added a fixation system to the model [21–23]. This method is convenient to develop a normal spine model, but when it comes to spinal deformity, the difficulty in simulating an abnormal spine curvature becomes a drawback.…”

Section: Discussionmentioning

confidence: 99%

Development of a Three-Dimensional Finite Element Model of Thoracolumbar Kyphotic Deformity following Vertebral Column Decancellation

Wang

Cai

Zhao

et al. 2019

Applied Bionics and Biomechanics

View full text Add to dashboard Cite

Background. Vertebral column decancellation (VCD) is a new spinal osteotomy technique to correct thoracolumbar kyphotic deformity (TLKD). Relevant biomechanical research is needed to evaluate the safety of the technique and the fixation system. We aimed to develop an accurate finite element (FE) model of the spine with TLKD following VCD and to provide a reliable model for further biomechanical analysis. Methods. A male TLKD patient who had been treated with VCD on L2 and instrumented from T10 to L4 was a volunteer for this study. The CT scanning images of the postoperative spine were used for model development. The FE model, simulating the spine from T1 to the sacrum, includes vertebrae, intervertebral discs, spinal ligaments, pedicle screws, and rods. The model consists of 509580 nodes and 445722 hexahedrons. The ranges of motion (ROM) under different loading conditions were calculated for validation. The stresses acting on rods, screws, and vertebrae were calculated. Results. The movement trend, peak stress, and ROM calculated by the current FE model are consistent with previous studies. The FE model in this study is able to simulate the mechanical response of the spine during different motions with different loading conditions. Under axial compression, the rod was the part bearing the peak stress. During flexion, the stress was concentrated on proximal pedicle screws. Under extension and lateral bending, an osteotomized L1 vertebra bore the greatest stress on the model. During tests, ligament disruption and unit deletion were not found, indicating an absence of fracture and fixation breakage. Discussion. A subject-specific FE model of the spine following VCD is developed and validated. It can provide a reliable and accurate digital platform for biomechanical analysis and surgical planning.

show abstract

Section: Discussionmentioning

confidence: 99%

Development of a Three-Dimensional Finite Element Model of Thoracolumbar Kyphotic Deformity following Vertebral Column Decancellation

Wang

Cai

Zhao

et al. 2019

Applied Bionics and Biomechanics

View full text Add to dashboard Cite

show abstract

“…Es handelt sich um eine rein deskriptive Analyse, bei der keine Aussagen zu Abläufen in der (Rolton et al 2016;La Rosa et al 2017;Lebon et al 2017;Gilday et al 2018;Lorenz et al 2019a). Segmentationsverfahren und die Finite-Elemente-Methode eine zunehmende Rolle spielen (Agarwal et al 2014b;Agarwal et al 2014a;Couvertier et al 2017;Hachem et al 2017;Zhu et al 2019). Hell AK, Hefti F, Campbell RM Jr (2004): Behandlung der kongenitalen Skoliose mit dem…”

Section: Limitationen Der Untersuchungunclassified

Morphometrische Wirbelkörperveränderungen bei Kindern mit spinaler Muskelatrophie und bilateralen vertikal-expandierbaren Wirbelsäulenimplantaten

Grages¹

View full text Add to dashboard Cite

show abstract

Intervertebral disc degeneration: an experimental and numerical study using a rabbit model

Calvo-Echenique

Cegoñino

Correa-Martín

et al. 2017

Med Biol Eng Comput

View full text Add to dashboard Cite

Animal models have been extensively used for the study of degenerative diseases and evaluation of new therapies to stop or even reverse the disease progression. The aim of this study is to reproduce lumbar intervertebral disc degeneration in a rabbit model by performing a percutaneous annular puncture at L4L5 level. The effect of this damage on the spine behaviour was analysed combining three different techniques: imaging processing, mechanical testing and computational modelling. Twenty New Zealand white rabbits were divided into control and experimental groups and followed up during 6 months. Intervertebral disc height, as well as nucleus area and signal intensity, decreased with degeneration while storage and loss moduli increased. Both changes may be related to the loss of water and tissue fibrosis. Similar but slighter changes were reported for adjacent discs. A finite element model was built based on MRI and mechanical testing findings to add new biomechanical information that cannot be obtained experimentally. Four stages were computationally simulated representing the different experimental phases. The numerical simulations showed that compressive stresses in the damaged and adjacent discs were modified with the progression of degeneration. Although extrapolation to humans should be carefully made, the use of numerical animal models combined with an experimental one could give a new insight of the overall mechanical behaviour of the spine.

show abstract

Porcine spine finite element model: a complementary tool to experimental scoliosis fusionless instrumentation

Cited by 7 publications

References 31 publications

Development of a Three-Dimensional Finite Element Model of Thoracolumbar Kyphotic Deformity following Vertebral Column Decancellation

Development of a Three-Dimensional Finite Element Model of Thoracolumbar Kyphotic Deformity following Vertebral Column Decancellation

Morphometrische Wirbelkörperveränderungen bei Kindern mit spinaler Muskelatrophie und bilateralen vertikal-expandierbaren Wirbelsäulenimplantaten

Intervertebral disc degeneration: an experimental and numerical study using a rabbit model

Contact Info

Product

Resources

About