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Periprosthetic bone response to axial loading following TKR: Effect of polyethylene thickness and implant material – a finite element analysis study

Ravishanker Baliga (Department of Aeronautical and Automobile Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India)
Sharat K. Rao (Department of Orthopaedics, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India)
Raghuvir Pai (Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India)
Satish B. Shenoy (Department of Aeronautical and Automobile Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India)
Atmananda K. Hegde (Department of Orthopaedics, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India)
Shubham Swaroop (Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India)
Abhijeet Shetkar (Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, India)

Multidiscipline Modeling in Materials and Structures

ISSN: 1573-6105

Article publication date: 22 October 2019

Issue publication date: 5 February 2020

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Abstract

Purpose

The purpose of this paper is to investigate by means of finite element analysis (FEA), the effect of polyethylene insert thickness and implant material, under axial loading following TKA.

Design/methodology/approach

The 3D geometric model of bone was processed using the CT scan data by MIMICS (3matic Inc.), package. Implant components were 3D scanned and subsequently 3D modeled using ANSYS Spaceclaim and meshed in Hypermesh (Altair Hyperworks). The assembled, meshed bone-implant model was then input to ABAQUS for FE simulations, considering axial loading.

Findings

Polyethylene insert thickness was found to have very little or no significance (p>0.05) on the mechanical performance, namely, stress, strain and stress shielding of bone-implant system. Implant material was found to have a very significant effect (p<0.05) on the performance parameters and greatly reduced the high stress zones up to 60 percent on the tibial flange region and periprosthetic region of tibia.

Originality/value

Very few FEA studies have been done considering a full bone with heterogeneous material properties, to save computational time. Moreover, four different polyethylene insert thickness with a metal-backed and all-poly tibial tray was considered as the variables affecting the bone-implant system response, under static axial loading. The authors believe that considering a full bone shall lead to more precise outcomes, in terms of the response of bone-implant system, namely, stress, strains and stress shielding in the periprosthetic region, to loading.

Keywords

Citation

Baliga, R., Rao, S.K., Pai, R., Shenoy, S.B., Hegde, A.K., Swaroop, S. and Shetkar, A. (2020), "Periprosthetic bone response to axial loading following TKR: Effect of polyethylene thickness and implant material – a finite element analysis study", Multidiscipline Modeling in Materials and Structures, Vol. 16 No. 2, pp. 359-372. https://doi.org/10.1108/MMMS-06-2018-0109

Publisher

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Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited

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