| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Gheduzzi, Sabina
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021Properties of PMMA end cap holders affect FE stiffness predictions of vertebral specimens
- 2020Hierarchical HRP-crosslinked silk fibroin/ZnSr-TCP scaffolds for osteochondral tissue regeneration: assessment of the mechanical and antibacterial propertiescitations
- 2017Validated cemented socket model for optimising acetabular fixation
- 2016Pre-clinical testing protocols for the evaluation of spinal biomechanics
- 2016A validated specimen specific finite element model of vertebral body failure
- 2009Influence of setting liquid composition and liquid-to-powder ratio on properties of a Mg-substituted calcium phosphate cementcitations
- 2006Mechanical characterisation of three percutaneous vertebroplasty biomaterials
- 2003Measurement of the micromotion and migration of an uncemented stem in an in-vitro test
Places of action
| Organizations | Location | People |
|---|
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%.