Comparative Finite Element Analysis of the Debonding Process in Different Concepts of Cemented Hip Implants

Pérez, M.Á.; Palacios, José Luis Calvo

doi:10.1007/s10439-010-9996-3

Cited by 17 publications

(16 citation statements)

References 58 publications

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“…However, these models were not capable of simulating the actual failure process at the interface. More recently, efforts have been made to model the failure response of the cement-bone interface using damage mechanics approaches (Moreo et al, 2007; Moreo et al, 2006; Perez et al, 2009; Perez and Palacios, 2010). These studies showed that the cement-bone interface plays an important role in the failure process of the cemented stem construct.…”

Section: Discussionmentioning

confidence: 99%

Multi-axial loading micromechanics of the cement–bone interface in postmortem retrievals and lab-prepared specimens

Miller

Race

Waanders

et al. 2011

Journal of the Mechanical Behavior of Biomedical Materials

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Maintaining adequate fixation between cement and bone is important for successful long term survival of cemented total joint replacements. Mixed-mode loading conditions (combination of tension/compression and shear) are present during in vivo loading, but the micromotion response of the interface to these conditions is not fully understood.Non-destructive, multi-axial loading experiments were conducted on laboratory prepared (n=6) and post mortem (n=6) human cement-bone interfaces. Specimens were mounted in custom loading discs and loaded at 0, 30, 60, and 90° relative to the interface plane where 0° represents normal loading to the interface, and 90° represents shear loading along the longitudinal axis of the femur. Axial compliance did not depend on loading angle for laboratory prepared (p=0.96) or postmortem specimens (p=0.62). The cement-bone interface was more compliant under tensile than compressive loading at the 0° loading angle only (p=0.024). The coupled transverse to axial compliance ratio, which is a measure of the coupled motion, was small for laboratory prepared (0.115±0.115) and postmortem specimens (0.142±0.101). There was a moderately strong inverse relationship between interface compliance and contact index (r 2 = 0.65).From a computational modeling perspective, the results of the current study support the concept that the cement-bone interface could be numerically implemented as a compliant layer with the same initial stiffness in tension and shear directions. The magnitude of the compliance could be modified to simulate immediate post-operative conditions (using laboratory prepared data set) or long-term remodeling (using postmortem data set).

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Section: Discussionmentioning

confidence: 99%

Multi-axial loading micromechanics of the cement–bone interface in postmortem retrievals and lab-prepared specimens

Miller

Race

Waanders

et al. 2011

Journal of the Mechanical Behavior of Biomedical Materials

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“…Bone cement is a visco-elastic material (Verdonschot and Huiskes 1994;Jeffers et al, 2005) and this will lead to stress relaxation in the first few hours or days, further altering the initial stress state. Only a few studies have incorporated the viscoelastic properties, either ignoring (Pérez and Palacios, 2010;Lu and McKellop, 1997;Stolk et al, 2004) or including the initial stress state (Jeffers et al, 2007). To date, insufficient work has been performed to clarify whether assuming a stress free cement mantle is an acceptable assumption.…”

Section: Simulation Of the Initial Mechanical Environment Of The Bonementioning

confidence: 99%

“…More recent studies have implemented a non-linear, fracture mechanics approach to simulate the failure process (Perez et al, 2005;Pérez and Palacios, 2010). Although an interesting and potentially useful methodology, its widespread application is again limited by the lack of experimental data, particularly the fatigue behaviour of the bone-cement interface.…”

Section: Time Dependent/adaptive Modelling Techniquesmentioning

confidence: 99%

Four decades of finite element analysis of orthopaedic devices: Where are we now and what are the opportunities?

Taylor

Prendergast

2015

Journal of Biomechanics

139

106

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a b s t r a c tFinite element has been used for more than four decades to study and evaluate the mechanical behaviour total joint replacements. In Huiskes seminal paper "Failed innovation in total hip replacement: diagnosis and proposals for a cure", finite element modelling was one of the potential cures to avoid poorly performing designs reaching the market place. The size and sophistication of models has increased significantly since that paper and a range of techniques are available from predicting the initial mechanical environment through to advanced adaptive simulations including bone adaptation, tissue differentiation, damage accumulation and wear. However, are we any closer to FE becoming an effective screening tool for new devices? This review contains a critical analysis of currently available finite element modelling techniques including (i) development of the basic model, the application of appropriate material properties, loading and boundary conditions, (ii) describing the initial mechanical environment of the bone-implant system, (iii) capturing the time dependent behaviour in adaptive simulations, (iv) the design and implementation of computer based experiments and (v) determining suitable performance metrics.The development of the underlying tools and techniques appears to have plateaued and further advances appear to be limited either by a lack of data to populate the models or the need to better understand the fundamentals of the mechanical and biological processes. There has been progress in the design of computer based experiments. Historically, FE has been used in a similar way to in vitro tests, by running only a limited set of analyses, typically of a single bone segment or joint under idealised conditions. The power of finite element is the ability to run multiple simulations and explore the performance of a device under a variety of conditions. There has been increasing usage of design of experiments, probabilistic techniques and more recently population based modelling to account for patient and surgical variability. In order to have effective screening methods, we need to continue to develop these approaches to examine the behaviour and performance of total joint replacements and benchmark them for devices with known clinical performance.Finite element will increasingly be used in the design, development and pre-clinical testing of total joint replacements. However, simulations must include holistic, closely corroborated, multi-domain analyses which account for real world variability.

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“…Since it is experimentally impossible to delineate how creep and fatigue damage interact at the cement-bone interface it is unknown which one affects the interface integrity the most. Finite Element Analysis (FEA) make this possible, but numerical studies in which fatigue failure of the cement-bone interface was investigated have not studied the relatively contribution of creep and fatigue damage (Perez and Palacios, 2010; Waanders et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

The effect of cement creep and cement fatigue damage on the micromechanics of the cement–bone interface

Waanders

Janssen

Mann

2010

Journal of Biomechanics

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The cement-bone interface provides fixation for the cement mantle within the bone. The cementbone interface is affected by fatigue loading in terms of fatigue damage, or micro cracks, and creep, both mostly in the cement. This study investigates how fatigue damage and cement creep separately affect the mechanical response of the cement-bone interface at various load levels in terms of plastic displacement and crack formation. Two FEA models were created, which were based on micro-computed tomography data of two physical cement-bone interface specimens. These models were subjected to tensile fatigue loads with four different magnitudes. Three deformation modes of the cement were considered; 'only creep', 'only damage' or 'creep and damage'. The interfacial plastic deformation, the crack reduction as a result of creep and the interfacial stresses in the bone were monitored. The results demonstrate that, although some models failed early, the majority of plastic displacement was caused by fatigue damage, rather than cement creep. However, cement creep does decrease the crack formation in the cement up to 20%. Finally, while cement creep hardly influences the stress levels in the bone, fatigue damage of the cement considerably increases the stress levels in the bone. We conclude that at low load levels the plastic displacement is mainly caused by creep. At moderate to high load levels, however, the plastic displacement is dominated by fatigue damage and is hardly affected by creep, although creep reduced the number of cracks in moderate to high load region.

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Comparative Finite Element Analysis of the Debonding Process in Different Concepts of Cemented Hip Implants

Cited by 17 publications

References 58 publications

Multi-axial loading micromechanics of the cement–bone interface in postmortem retrievals and lab-prepared specimens

Multi-axial loading micromechanics of the cement–bone interface in postmortem retrievals and lab-prepared specimens

Four decades of finite element analysis of orthopaedic devices: Where are we now and what are the opportunities?

The effect of cement creep and cement fatigue damage on the micromechanics of the cement–bone interface

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