3D real-time micromechanical compressive behaviour of bone–cement interface: Experimental and finite element studies

Tozzi, Gianluca; Zhang, Qinghang; Tong, Jie

doi:10.1016/j.jbiomech.2011.10.011

Cited by 32 publications

(50 citation statements)

References 36 publications

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“…In addition, it was observed that typical trabecular-cement constructs representative of TKA experienced localised failure within the supporting trabecular bone, under uniaxial compression. The latter observation is consistent with our previous work on the microdamage initiation and failure of bone-cement interface under monotonic compression, tension and shear, using specimens produced from trabecular bone and bone cement (Tozzi et al, 2012bZhang et al, 2014), where the failures were found mainly in the bone region, particularly at the bone-cement partially interdigitated region, rather than Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/jbiomech www.JBiomech.com the fully interdigitated region. Moreover, under compressive loading, yielded bone volume was always found to be higher than that of the cement.…”

Section: Introductionsupporting

confidence: 91%

“…No selection was made with regard to trabecular or cortical structures and rectangular trabecular/cortical bone coupons were machined to size and thoroughly cleaned to remove fatty tissues. Bone-cement interface coupons were obtained using a method reported in Tozzi et al (2012b). The bone cement preparation was conducted following the manufacturer's specifications.…”

Section: Specimensmentioning

confidence: 99%

“…Extensive work has been conducted on bone-cement interface over the years, simulating different loading scenarios (Mann et al, 1997(Mann et al, , 1999(Mann et al, , 2001Kim et al, 2004;Wang et al, 2010). Novel approaches, including digital image correlation (DIC) and in situ mechanical testing (Mann et al, 2008Miller et al, 2010Miller et al, , 2011Tozzi et al, 2012b, have been recently employed to explore local and micro-mechanisms. However, characterisation of the damage progression at the interface, particularly under cyclic loading conditions, has yet to be reported.…”

Section: Introductionmentioning

confidence: 99%

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Microdamage assessment of bone-cement interfaces under monotonic and cyclic compression

Tozzi

Zhang

Tong

2014

Journal of Biomechanics

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Bone-cement interface has been investigated under selected loading conditions, utilising experimental techniques such as in situ mechanical testing and digital image correlation (DIC). However, the role of bone type in the overall load transfer and mechanical behaviour of the bone-cement construct is yet to be fully quantified. Moreover, microdamage accumulation at the interface and in the cement mantle has only been assessed on the exterior surfaces of the samples, where no volumetric information could be obtained. In this study, some typical bone-cement interfaces, representative of different fixation scenarios for both hip and knee replacements, were constructed using mainly trabecular bone, a mixture of trabecular and cortical bone and mainly cortical bone, and tested under static and cyclic compression. Axial displacement and strain fields were obtained by means of digital volume correlation (DVC) and microdamage due to static compression was assessed using DVC and finite element (FE) analysis, where yielded volumes and strains (εzz) were evaluated. A significantly higher load was transferred into the cement region when mainly cortical bone was used to interdigitate with the cement, compared with the other two cases. In the former, progressive damage accumulation under cyclic loading was observed within both the bone-cement interdigitated and the cement regions, as evidenced by the initiation of microcracks associated with high residual strains (εzz_res).

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Section: Introductionsupporting

confidence: 91%

Section: Specimensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microdamage assessment of bone-cement interfaces under monotonic and cyclic compression

Tozzi

Zhang

Tong

2014

Journal of Biomechanics

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“…Most of the research focuses on the mechanical/deformation behaviour but other properties are also considered. Amongst the recent studies, some are dedicated to cellular materials in general, 362,[376][377][378][379][380] others focus on specific types of cellular materials including metals, 372,[381][382][383][384][385][386][387][388][389][390] ceramics, 257,[391][392][393][394] polymers, [395][396][397] carbon, 398 nuclear graphite 399 and even bread. 400 In some cases FE simulations have been run side by side with in situ deformation under CT observation to compare their predictive capability both locally on a strut-by-strut basis and globally in terms of Poisson's ratio and Young's modulus, for example for conventional versus auxetic open cell foams.…”

Section: Image Based Modelling Of Cellular/porous Materialsmentioning

confidence: 99%

Quantitative X-ray tomography

Maire¹,

Withers²

2013

International Materials Reviews

1,036

601

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X-ray computer tomography (CT) is fast becoming an accepted tool within the materials science community for the acquisition of 3D images. Here the authors review the current state of the art as CT transforms from a qualitative diagnostic tool to a quantitative one. Our review considers first the image acquisition process, including the use of iterative reconstruction strategies suited to specific segmentation tasks and emerging methods that provide more insight (e.g. fast and high resolution imaging, crystallite (grain) imaging) than conventional attenuation based tomography. Methods and shortcomings of CT are examined for the quantification of 3D volumetric data to extract key topological parameters such as phase fractions, phase contiguity, and damage levels as well as density variations. As a non-destructive technique, CT is an ideal means of following structural development over time via time lapse sequences of 3D images (sometimes called 3D movies or 4D imaging). This includes information needed to optimise manufacturing processes, for example sintering or solidification, or to highlight the proclivity of specific degradation processes under service conditions, such as intergranular corrosion or fatigue crack growth. Besides the repeated application of static 3D image quantification to track such changes, digital volume correlation (DVC) and particle tracking (PT) methods are enabling the mapping of deformation in 3D over time. Finally the use of CT images is considered as the starting point for numerical modelling based on realistic microstructures, for example to predict flow through porous materials, the crystalline deformation of polycrystalline aggregates or the mechanical properties of composite materials.

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“…This loading device, as shown in Fig. 1b, has been used in previous studies [43]. It has a torque accurately applied by a DC motor, which is then transmitted to a ballscrew system via a set of gears, resulting in the application of precise strain steps without introducing fluctuation errors.…”

Section: Micro-compression Devicementioning

confidence: 99%

Computation of full-field displacements in a scaffold implant using digital volume correlation and finite element analysis

Madi

Tozzi

Zhang

et al. 2013

Medical Engineering & Physics

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Measurements of three-dimensional displacements in a scaffold implant under uniaxial compression have been obtained by two Digital Volume Correlation (DVC) methods, and compared with those obtained from micro-finite element models. The DVC methods were based on two approaches, a local approach which registers independent small volumes and yields discontinuous displacement fields; and a global approach where the registration is performed on the whole volume of interest, leading to continuous displacement fields. A customised mini-compression device was used to perform in situ step-wise compression of the scaffold within a micro-computed tomography (µCT) chamber, and the data were collected at steps of interest. Displacement uncertainties, ranging from 0.006 to 0.02 voxel (i.e.0.12 to 0.4 μm), with a strain uncertainty between 60 and 600 με, were obtained with a spatial resolution of 32 voxels using both approaches, although the global approach has lower systematic errors. Reduced displacement and strain uncertainties may be obtained using the global approach by increasing the element size; and using the local approach by increasing the number of intermediary sub-volumes. Good agreements between the results from the DVC measurements and the FE simulations were obtained in the primary loading direction as well as in the lateral directions. This study demonstrates that volumetric strain measurements can be obtained successfully using DVC, which may be a useful tool to investigate mechanical behaviour of porous implants.

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3D real-time micromechanical compressive behaviour of bone–cement interface: Experimental and finite element studies

Cited by 32 publications

References 36 publications

Microdamage assessment of bone-cement interfaces under monotonic and cyclic compression

Microdamage assessment of bone-cement interfaces under monotonic and cyclic compression

Quantitative X-ray tomography

Computation of full-field displacements in a scaffold implant using digital volume correlation and finite element analysis

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