| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Gill, H. S.
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Experiments and numerical modelling of secondary flows of blood and shear-thinning blood analogue fluids in rotating domainscitations
- 2024Auxetic fixation devices can achieve superior pullout performances compared to standard fixation conceptscitations
- 2021Properties of PMMA end cap holders affect FE stiffness predictions of vertebral specimens
- 20213D Printed Medical Grade Ti-6Al-4V Osteosynthesis Devices Meet the Requirements for Tensile Strength, Bending, Fatigue and Biocompatibility
- 2019Evaluating strength of 3D printed screw threads for patient-specific osteosynthesis plates
- 2019Evaluation of optimised cervical spine viscoelastic elements for sport injury analysis
- 2018The effect of plate design, bridging span, and fracture healing on the performance of high tibial osteotomy plates – an experimental and finite element study.citations
- 2017Validated cemented socket model for optimising acetabular fixation
- 2017Effect of absorbed fatty acids on physical properties of ultra-high molecular weight polyethylene
- 2017Use of contrast agents on polymeric materials
- 2016A Python Package to Assign Material Properties of Bone to Finite Element Models from within Abaqus Software
- 2016An open source software tool to assign the material properties of bone for ABAQUS finite element simulationscitations
- 2016A validated specimen specific finite element model of vertebral body failure
- 2016Variations in Cortical Thickness of Composite Femur Test Specimens
- 2015Tibial Fracture after Unicompartmental Knee Replacement: The Importance of Surgical Cut Accuracy
- 2014Classification of retinal ganglion cells in the southern hemisphere lamprey Geotria australis (Cyclostomata)citations
- 2014Effect of Q-switched laser surface texturing of titanium on osteoblast cell response
- 2013Fracture of mobile unicompartmental knee bearingscitations
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article
Properties of PMMA end cap holders affect FE stiffness predictions of vertebral specimens
Abstract
Bone cement is often used, in experimental biomechanics, as a potting agent for vertebral bodies (VB). As a consequence, it is usually included in finite element (FE) models to improve accuracy in boundary condition settings. However, bone cement material properties are typically assigned to these models based on literature data obtained from specimens created under conditions which often differ from those employed for cement end caps. These discrepancies can result in solids with different material properties from those reported. Therefore, this study aimed to analyse the effect of assigning different mechanical properties to bone cement in FE vertebral models. A porcine C2 vertebral body was potted in bone cement end caps, µCT scanned, and tested in compression. DIC was performed on the anterior surface of the specimen to monitor the displacement. Specimen stiffness was calculated from the load-displacement output of the materials testing machine and from the machine load output and average displacement measured by DIC. Fifteen bone cement cylinders with dimensions similar to the cement end caps were produced and subjected to the same compression protocol as the vertebral specimen and average stiffness and Young’ moduli were estimated. Two geometrically identical vertebral body FE models were created from the µCT images, the only difference residing in the values assigned to bone cement material properties: in one model these were obtained from the literature and in the other from the cylindrical cement samples previously tested. The average Young’s modulus of the bone cement cylindrical specimens was 1177±3 MPa, considerably lower than the values reported in the literature. With this value, the FE model predicted a vertebral specimen stiffness 3% lower than that measured experimentally, while when using the value most commonly reported in similar studies, specimen stiffness was overestimated by 150%.