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

Baliga, Ravishanker B and Rao, Sharath K and Pai, Raghuvir B and Shenoy, Satish B and Hegde, Atmananda S. and Swaroop, Shubham and ABHIJEET RAJENDRA, SHETKAR (2019) 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, 2019. ISSN 15736105

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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 ( pW0.05) on the mechanical performance, namely, stress, strain and stress shielding of bone-implant system. Implant material was found to have a very significant effect ( po0.05) 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

Item Type: Article
Uncontrolled Keywords: Finite element analysis; knee implant; posterior stabilised;stress shielding.
Subjects: Medicine > KMC Mangalore > Orthopaedics
Depositing User: KMCMLR User
Date Deposited: 03 Nov 2020 09:07
Last Modified: 03 Nov 2020 09:07
URI: http://eprints.manipal.edu/id/eprint/155992

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