Finite element analysis methodology of patient-specific revision knee endoprostheses based on computed tomography data

Authors

DOI:

https://doi.org/10.20535/2521-1943.2025.9.2(105).336223

Keywords:

revision arthroplasty, patient-specific prostheses, knee joint, anatomical compatibility, 3D modeling, elastic-deformed state, strength, contact stress, load-bearing capacity

Abstract

Revision femoral knee joint replacement using patient-specific prostheses manufactured from titanium alloy via additive 3D printing technologies is considered. A relevant problem is ensuring optimal geometric compatibility of the prosthesis with the patient’s anatomical features, which minimizes the risk of complications and increases the longevity of the implant. Existing standardized prostheses often fail to account for individual variations, which can lead to complications and increased wear of components. The aim of this study is to develop and validate a methodology for assessing the load-bearing capacity of revision prostheses by creating a series of patient-specific simulation models of metal constructions for a typical revision case, followed by comparison of their stress-strain state and contact stresses with a two-layer biological bone model. Geometric data from 15 patients were collected using computed tomography in DICOM format, followed by model simplification and conversion into .stl files. For one patient, four variants of patient-specific prostheses with typical dimensions and shapes were modeled. Applied biomechanics problems were solved using the Ansys Student 2024 R2 software package. As a result, quantitative indicators of prosthesis stresses, contact zone stresses, and maximum displacements of the bone-prosthesis system were obtained. The study results can be used in orthopedic practice to select the optimal prosthesis geometry for improving the effectiveness of revision knee joint replacement.

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Published

2025-06-26

How to Cite

[1]
Y. Ovcharenko and M. Kryshchuk, “Finite element analysis methodology of patient-specific revision knee endoprostheses based on computed tomography data”, Mech. Adv. Technol., vol. 9, no. 2(105), pp. 210–221, Jun. 2025.

Issue

Vol. 9 No. 2(105) (2025)

Section

Advanced Mechanical Engineering and Manufacturing Technologies

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Copyright (c) 2025 Yehor Ovcharenko, Mykola Kryshchuk

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