Finite Element Analysis of the Pelvis after Customized Prosthesis Reconstruction

Dong, Enchun; Iqbal, Taimoor; Li, Dichen; Liu, Yaxiong; He, Jiankang; Zhao, Binghui; Li, Yuan

doi:10.1007/s42235-018-0035-7

Cited by 18 publications

(18 citation statements)

References 22 publications

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“…So, the amount of such elements was quite low, and this fact could be The finite element size for the pelvic bones and implant ranged from 0.5 mm to 2 mm. It complied with the conclusion of previous research [2] studying the dependence of the optimal mesh size and obtaining reliable results. It should be mentioned that the cortical layer was modelled as a solid body with a constant thickness by offsetting the outer surface inward by 0.5 mm (Figure 3b).…”

Section: Finite Element Modelssupporting

confidence: 89%

“…Various implants are used for different types of pelvis injuries, such as modular pelvis prostheses, saddle prostheses, pedestal cups, and custom-made pelvis prostheses. Among them, custom-made endoprostheses are matched with the patient's bones, which in turn can reduce the risk of infection, dislocation, or failure of the implant [2]. Therefore, a custom prosthesis design is in demand when it is required to treat a complex bone fracture or replace a primary serial implant.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the FE method is becoming increasingly popular in pelvis biomechanics research and plays a critical role in failure analysis and revision prosthesis design [2]. Although some FE analyses of custom-made prostheses have been carried out, studies of the influence of the prestress of the screws on the biomechanical performance of a reconstructed pelvis for walking patterns are rarely reported [2].…”

Section: Introductionmentioning

confidence: 99%

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Finite Element Analysis of Customized Acetabular Implant and Bone after Pelvic Tumour Resection throughout the Gait Cycle

et al. 2021

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The aim of this paper is to investigate and compare the stress distribution of a reconstructed pelvis under different screw forces in a typical walking pattern. Computer-aided design models of the pelvic bones and sacrum made based on computer tomography images and individually designed implants are the basis for creating finite element models, which are imported into ABAQUS software. The screws provide compression loading and bring the implant and pelvic bones together. The sacrum is fixed at the level of the L5 vertebrae. The variants of strength analyses are carried out with four different screw pretension forces. The loads equivalent to the hip joint reaction forces arising during moderate walking are applied to reference points based on the centres of the acetabulum. According to the results of the performed analyses, the optimal and critical values of screw forces are estimated for the current model. The highest stresses among all the models occurred in the screws and implant. As soon as the screw force increases up to the ultimate value, the bone tissue might be locally destroyed. The results prove that the developed implant design with optimal screw pretension forces should have good biomechanical characteristics.

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Section: Finite Element Modelssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Finite Element Analysis of Customized Acetabular Implant and Bone after Pelvic Tumour Resection throughout the Gait Cycle

et al. 2021

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“…Over the last decade, certain publications have reported the results of biomechanical studies of the "skeletonendoprosthesis" system under the conditions of revision arthroplasty, associated with significant surgical intervention and individual implant selection. Thus, in Liu et al and Dong et al [11,12], various implants made from conventional titanium alloy and their fixation in the pelvic bone were examined from biomechanical perspectives. In earlier works [13,14], reconstruction of the acetabulum of the pelvis using implants made from autogenous biological materials taken from the fibula was discussed.…”

Section: Introductionmentioning

confidence: 99%

“…Figures 10,11,12,13,14,and 15 show the FEA simulation results in comparison with the experimental data represented by the bottom and upper curves, respectively.The experimental data had the following average values of the standard deviation: Fig.10:16 MPa, Fig.11:9 MPa, Fig.12:15 MPa, Fig.13: 0.9 Nm, Fig.14:0.9 Nm, and Fig.15:1.9 Nm. The axis notations in these graphs were chosen in accordance with the experimental data obtained from the tension and torsion tests.Several conclusions can be drawn from these curves.…”

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confidence: 99%

Development of elastic–plastic model of additively produced titanium for personalised endoprosthetics

Боровков

Маслов

Tarasenko

et al. 2021

Int J Adv Manuf Technol

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This study presents a model for Ti6Al4V alloy produced by applying electron beam melting as continuum media with orthotropic elastic and plastic properties and its application in total hip replacement (THR). The model exhibits three Young’s moduli, three shear moduli, and three Poisson’s ratios as elastic properties and six coefficients describing the Hill yield criterion. Several uniaxial tension and torsion experiments and subsequent data processing were performed to evaluate the properties and coefficients. The typical values obtained for Young’s moduli, shear moduli, and Poisson’s ratio were 121–124 MPa, 37–42 MPa, and 0.25–0.26, respectively. A comparison of the experimental tension and torsion curves with those obtained by a finite element analysis revealed a good correlation with a maximum error of 9.5%. The finite element simulation of a personalised pelvic implant for THR manufactured from the obtained material proved the mechanical capability of the implant to successfully withstand the applied loads.

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Hip joint center lateralization minimally affects the biomechanics of patient‐specific flanged acetabular components: A computational model

Lee,

Boettner,

Blevins

et al. 2024

Journal Orthopaedic Research

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Patient‐specific flanged acetabular components are utilized to treat failed total hip arthroplasties with large acetabular defects. Previous clinical studies from our institution showed that these implants tend to lateralize the acetabular center of rotation. However, the clinical impact of lateralization on implant survivorship is debated. Our goal was to develop a finite element model to quantify how lateralization of the native hip center affects periprosthetic strain and implant‐bone micromotion distributions in a static level gait loading condition. To build the model, we computationally created a superomedial acetabular defect in a computed tomography 3D reconstruction of a native pelvis and designed a flanged acetabular implant to address this simulated bone defect. We modeled two implants, one with ~1 cm and a second with ~2 cm of hip center lateralization. We applied the maximum hip contact force and corresponding abductor force observed during level gait. The resulting strains were compared to bone fatigue strength (0.3% strain) and the micromotions were compared to the threshold for bone ingrowth (20 µm). Overall, the model demonstrated that the additional lateralization only slightly increased the area of bone at risk of failure and decreased the areas compatible with bone ingrowth. This computational study of patient‐specific acetabular implants establishes the utility of our modeling approach. Further refinement will yield a model that can explore a multitude of variables and could be used to develop a biomechanically‐based acetabular bone loss classification system to guide the development of patient‐specific implants in the treatment of large acetabular bone defects.

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Finite Element Analysis of the Pelvis after Customized Prosthesis Reconstruction

Cited by 18 publications

References 22 publications

Finite Element Analysis of Customized Acetabular Implant and Bone after Pelvic Tumour Resection throughout the Gait Cycle

Finite Element Analysis of Customized Acetabular Implant and Bone after Pelvic Tumour Resection throughout the Gait Cycle

Development of elastic–plastic model of additively produced titanium for personalised endoprosthetics

Hip joint center lateralization minimally affects the biomechanics of patient‐specific flanged acetabular components: A computational model

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