First cervical vertebra (atlas) fracture mechanism studies using finite element method

Teo, Ee-Chon; Ng, H. W.

doi:10.1016/s0021-9290(00)00169-x

Cited by 68 publications

(40 citation statements)

References 21 publications

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“…Inspection of the spinal specimen showed no gross pathological abnormalities. An accurate multi-axis digitizer (FaroArm, Bronze Series, Faro Technology Inc., FL, USA) was used to extract the geometrical data of the vertebrae (T11, T12 and L1) by adopting the digitizing technique reported previously [29]. The geometrical data of the bony vertebrae obtained were used for subsequent reconstruction of three-dimensional geometry of the T11-L1 complex and FE mesh in a commercially available FE code, ANSYS version 6.0.…”

Section: Model Constructionmentioning

confidence: 99%

Effect of bilateral facetectomy of thoracolumbar spine T11–L1 on spinal stability

2006

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Spinal stenosis can be found in any part of the spine, though it is most commonly located on the lumbar and cervical areas. It has been documented in the literature that bilateral facetectomy in a lumbar motion segment to increase the space induces an increase in flexibility at the level at which the surgery was performed. However, the result of bilateral facetectomy on the stability of the thoracolumbar spine has not been studied. A nonlinear three-dimensional finite element (FE) model of thoracolumbar T11-L1 was built to explore the influence of bilateral facetectomy. The FE model of T11-L1 was validated against published experimental results under various physiological loadings. The FE model with bilateral facetectomy was evaluated under flexion, extension, lateral bending and axial rotation to determine alterations in kinematics. Results show that bilateral facetectomy causes increase in motion, considerable increase in axial rotation and least increase in lateral bending. Removal of facets did not result in significant change in the sagittal motion in flexion and extension.

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Section: Model Constructionmentioning

confidence: 99%

Effect of bilateral facetectomy of thoracolumbar spine T11–L1 on spinal stability

2006

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“…These models can effectively predict the gross intervertebral response under loads. In contrast, the models developed for static study are generally more detailed in the representation of the spinal materials and geometries (Goel and Clausen, 1998;Puttlitz et al, 2000;Teo and Ng, 2001 complex loading conditions, presently these models mainly consist of either one or two spinal motion segments and may not able to provide the realistic response of the physical mutli-levels of the spinal column. Accordingly, the authors aim to develop a detailed C0-C7 FE model to investigate the biomechanical response of the head and cervical spine under both static and dynamic conditions.…”

Section: Introductionmentioning

confidence: 99%

Finite element analysis of moment-rotation relationships for human cervical spine

Zhang

Teo

et al. 2006

Journal of Biomechanics

157

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“…Computer modeling studies have demonstrated that the anterior arch in adults is most vulnerable to tension in the plane of the atlas ring. 30 Because the noncontiguous atlas likely expands under compression, axial loading will widen the anterior arch when a posterior arch defect is present, especially with the neck flexed. The higher elastic properties in a developing atlas may absorb the elevated tensile stresses, protecting it from injury.…”

Section: Discussionmentioning

confidence: 99%

Jefferson fractures of the immature spine

AuYong¹,

Piatt²

2009

PED

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Jefferson fractures of the immature spine have received little attention in the study of pediatric spinal trauma. Fractures through synchondroses are a possibility in the immature spine, in addition to fractures through osseous portions of the vertebral ring, and they create opportunities for misinterpretation of diagnostic imaging. The authors describe 3 examples of Jefferson fractures in young children. All 3 cases featured fractures through an anterior synchondrosis in association with persistence of the posterior synchondrosis or a fracture of the posterior arch. The possibility of a Jefferson fracture should be considered for any child presenting with neck pain, cervical muscle spasm, or torticollis following a head injury, despite a seemingly normal cervical spine study. Jefferson fractures in young children are probably much more common than previously recognized.

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First cervical vertebra (atlas) fracture mechanism studies using finite element method

Cited by 68 publications

References 21 publications

Effect of bilateral facetectomy of thoracolumbar spine T11–L1 on spinal stability

Effect of bilateral facetectomy of thoracolumbar spine T11–L1 on spinal stability

Finite element analysis of moment-rotation relationships for human cervical spine

Jefferson fractures of the immature spine

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