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

• Published in: Multidiscipline modeling in materials and structures 2020-10, Vol.16 (2), p.359-372
• Main Authors: Baliga, Ravishanker, Rao, Sharat K., Pai, Raghuvir, Shenoy, Satish B., Hegde, Atmananda K., Swaroop, Shubham, Shetkar, Abhijeet
• Format: Article
• Language: English
• Subjects: Axial loads; Axial skeleton; Bone density; Cement; Computed tomography; Computer applications; Computing time; Finite element method; Material properties; Mathematical models; Mechanical loading; Mechanical properties; Polyethylene; Polyethylenes; Prostheses; Stress shielding; Surgical techniques; Thickness; Three dimensional models; Tibia; Titanium
• ISSN: 1573-6105; 1573-6113
• DOI: 10.1108/MMMS-06-2018-0109

PurposeThe 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/approachThe 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.FindingsPolyethylene 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