The effect of cement mantle thickness on strain energy density distribution and prediction of bone density changes around cemented acetabular component

Sanjay, Devismita; Mondal, Subrata Kumar; Bhutani, Richa; Ghosh, Rajesh

doi:10.1177/0954411918793448

Cited by 7 publications

(3 citation statements)

References 33 publications

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“…Adaptive bone remodelling is thought to be governed by the magnitude of the bone strain, 21 frequency 40 and rate of loading. 6 Adaptive bone remodelling simulations using different mechanical stimulus have been compared 34 and most use change in Strain Energy Density (SED) as the stimulus in both uncemented 22 and cemented 37 fixations. SAAP periprosthetic bone strain measurement is not possible in vivo or in vitro due to the difficulties in obtaining measurements at the bone implant interface, however finite element (FE) models (in silico models) can generate this information.…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of an ITAP Numerical Model and the Effect of Implant Stem Stiffness on Bone Strain Energy

Ahmed

Greene²,

Aston

et al. 2020

Ann Biomed Eng

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The Intraosseous Transcutaneous Amputation Prosthesis (ITAP) offers transfemoral amputees an ambulatory method potentially reducing soft tissue complications seen with socket and stump devices. This study validated a finite element (in silico) model based on an ITAP design and investigated implant stem stiffness influence on periprosthetic femoral bone strain. Results showed good agreement in the validation of the in silico model against the in vitro results using uniaxial strain gauges and Digital Image Correlation (DIC). Using Strain Energy Density (SED) thresholds as the stimulus for adaptive bone remodelling, the validated model illustrated that: (a) bone apposition increased and resorption decreased with increasing implant stem flexibility in early stance; (b) bone apposition decreased (mean change = 2 9.8%) and resorption increased (mean change = 20.3%) from distal to proximal in most stem stiffness models in early stance. By engineering the flow of force through the implant/ bone (e.g. by changing material properties) these results demonstrate how periprosthetic bone remodelling, thus aseptic loosening, can be managed. This paper finds that future implant designs should be optimised for bone strain under a variety of relevant loading conditions using finite element models to maximise the chances of clinical success.

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Section: Introductionmentioning

confidence: 99%

Experimental Validation of an ITAP Numerical Model and the Effect of Implant Stem Stiffness on Bone Strain Energy

Ahmed

Greene²,

Aston

et al. 2020

Ann Biomed Eng

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“…They found that for the single head and cup size considered, both non‐standard cup orientation and non‐uniform cement thickness elevated peak stress near the bone‐cement interface and that the homogenous model underestimated peak bone‐cement interface stress compared to the subject‐specific model. Sanjay et al developed a three‐dimensional (3D) FE model and used it to investigate the effect of uniform and non‐uniform cement mantle thickness on the strain energy density and tensile stress distribution in the cement mantle of a hip during normal walking, They found that a non‐uniform cement mantle thickness affected tensile stress in the cement mantle, in particular, stress was found to increase significantly with a decrease in cement mantle thickness in the superior direction. Zant et al describe the use of a new hip simulator to undertake an in vitro study of fatigue behavior in prosthetic acetabula cemented in a bovine pelvic bone backed by FE analysis.…”

mentioning

confidence: 99%

Effect of Femoral Head Size, Subject Weight, and Activity Level on Acetabular Cement Mantle Stress Following Total Hip Arthroplasty

Del‐Valle‐Mojica

Alonso-Rasgado

Jimenez-Cruz

et al. 2019

Journal Orthopaedic Research

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In cases where cemented components are used in total hip arthroplasty, damage, or disruption of the cement mantle can lead to aseptic loosening and joint failure. Currently, the relationship between subject activity level, obesity, and prosthetic femoral head size and the risk of aseptic loosening of the acetabular component in cemented total hip arthroplasty is not well understood. This study aims to provide an insight into this. Finite element models, validated with experimental data, were developed to investigate stresses in the acetabular cement mantle and pelvic bone resulting from the use of three prosthetic femoral head sizes, during a variety of daily activities and one high impact activity (stumbling) for a range of subject body weights. We found that stresses in the superior quadrants of the cortical bone-cement interface increased with prosthetic head size, patient weight, and activity level. In stumbling, average von Mises stresses (22.4 MPa) exceeded the bone cement yield strength for an obese subject (143 kg) indicating that the cement mantle would fail. Our results support the view that obesity and activity level are potential risk factors for aseptic loosening of the acetabular component and provide insight into the increased risk of joint failure associated with larger prosthetic femoral heads.

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“…In the past few decades, finite element based modelling (FEM) technique have become a very useful technique to model biomechanical problems. 14,15,37,38 Singleedge-cracked geometries, under uniform tension load, were modelled by the finite element technique as indicated in Figure 4. The FE model was developed using ABAQUS 2017 software, (Dassault Systems, Providence, RI, USA) and meshing was done using 8noded quadrilateral elements.…”

Section: Fracture Mechanics Formulation For Anisotropic Bonementioning

confidence: 99%

Experimental and numerical comparisons between finite element method, element-free Galerkin method, and extended finite element method predicted stress intensity factor and energy release rate of cortical bone considering anisotropic bone modelling

Kumar

Shitole

Ghosh

et al. 2019

Proc Inst Mech Eng H

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Stress intensity factor and energy release rate are important parameters to understand the fracture behaviour of bone. The objective of this study is to predict stress intensity factor and energy release rate using finite element method, element-free Galerkin method, and extended finite element method and compare these results with the experimentally determined values. For experimental purpose, 20 longitudinally and transversely fractured single-edge notched bend specimens were prepared and tested according to ASTM standard. All specimens were tested using the universal testing machine. For numerical simulations (finite element method, element-free Galerkin method, and extended finite element method), two-dimensional model of cortical bone was developed by assuming plane strain condition. Material properties of the cortical bone were considered as anisotropic and homogeneous. The values obtained through finite element method, element-free Galerkin method, and extended finite element method are well corroborated to experimentally determined values and earlier published data. However, element-free Galerkin method and extended finite element method predict more accurate results as compared to finite element method. In the case of the transversely fractured specimen, the values of stress intensity factor and energy release rate were found to be higher as compared to the longitudinally fractured specimen, which shows consistency with earlier published data. This study also indicates element-free Galerkin method and extended finite element method predicted stress intensity factor and energy release rate results are more close to experimental results as compared to finite element method, and therefore, these methods can be used in the different field of biomechanics, particularly to predict bone fracture.

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The effect of cement mantle thickness on strain energy density distribution and prediction of bone density changes around cemented acetabular component

Cited by 7 publications

References 33 publications

Experimental Validation of an ITAP Numerical Model and the Effect of Implant Stem Stiffness on Bone Strain Energy

Experimental Validation of an ITAP Numerical Model and the Effect of Implant Stem Stiffness on Bone Strain Energy

Effect of Femoral Head Size, Subject Weight, and Activity Level on Acetabular Cement Mantle Stress Following Total Hip Arthroplasty

Experimental and numerical comparisons between finite element method, element-free Galerkin method, and extended finite element method predicted stress intensity factor and energy release rate of cortical bone considering anisotropic bone modelling

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