Finite Element Analysis of A Hip Joint Prosthesis with An Extramedullary Fixation System

2020 ◽  
Author(s):  
Mahdi Ebrahimkhani ◽  
Alireza Abbasi Ghiri ◽  
Farzam Farahmand
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Hip Joint ◽  
Joint Prosthesis ◽  
Element Analysis ◽  
Extramedullary Fixation ◽  
Fixation System

Biomechanical Modeling of Hip Joint Prosthesis

2005 ◽  
Author(s):  
M. C. Gaspar ◽  
A. Mateus ◽  
C. Pereira ◽  
F. V. Antunes
Keyword(s):  
Finite Element ◽  
Hip Joint ◽  
Laser Scanning ◽  
Hip Prosthesis ◽  
Element Model ◽  
Geometrical Model ◽  
Elastic Behavior ◽  
Joint Prosthesis ◽  
Element Analysis

In this work a Bombelli cementless isoelastic RM total hip prosthesis was considered. It was implanted over a course of 14 years on the patient and studied subsequently to its chirurgical replacement. Computed Tomography, radiographies and 3-D laser scanning were used to assess the prosthesis geometry, while the original femur anatomy was modeled based on 2-D radiographies taken at different stages of the in-vivo implant of the prosthesis. A finite element model was developed, based on the generated 3-D geometrical model, considering a linear elastic behavior and typical loading conditions. This analysis allowed determining stress and strain fields throughout bone-prosthesis contact surface and critical areas in terms of micromovements. The developed procedure, consisting of 3-D scanning, generation of geometrical 3-D models and finite element analysis, results in a powerful tool to follow-up and predict failure mechanisms in hip joint prosthesis.

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