Finite Element analysis of stress state in the cement of total hip prosthesis with elastomeric stress barrier

Abstract

In the total hip prosthesis, according to different positions of the patient, there are a variety of loads acting on femoral head which generate stress concentration in the cement called polymethylmethacrylat (PMMA) and consequently in the interfaces stem/cement/bone. This load transfer can provoke loosening of the implant from the femoral bone. This paper focused on optimal stress distribution in the total hip prosthesis and devoted to the development of a redesigned prosthesis type in order to minimize stress concentration in the cement. This study investigated the effect of elastomeric stress barrier incorporated between the stem and femoral head using 3D-finite element analysis. This proposed implant provoked lower load transfer in the cement due to the elastomeric effect as stress absorber. However, the proposed model provided an acceptable solution for load transfer reduction to the cement. This investigation permitted to increase the service life of the total hip prosthesis avoiding the loosening.

A New Approach for the Tribological and Mechanical Characterization of a Hip Prosthesis Trough a Numerical Model Based on Artificial Intelligence Algorithms and Humanoid Multibody Model

“…These techniques support the already developed algorithms based on the use of artificial intelligence and machine learning, which allow the determination of fundamental parameters, such as the position of the center of mass [21][22][23], and the evaluation of the exact load distribution on the prostheses. Fadela et al [24] have analyzed the optimal stress distribution in the total hip prostheses with the aim to develop a redesigned prosthesis type in order to minimize stress concentration in the cement using 3D-finite element analysis. Bhawe et al [25] have analyzed how the combination of UHMWPE, CoCrMo alloy, and Ti-6Al-4 V alloy affect the femoral head sizes from 24 mm to 48 mm to know the best size using the Finite Element Method (FEM).…”

Flexural behavior of delta and bi-delta cold-formed steel beams: experimental investigation and numerical analysis

“…inite element analysis provides a cost-effective solution to many engineering problems given the cost and time required to manufacture and create tests of actual physical models. This is why, in this article, a numerical study by finite elements is carried out using the Abaqus 6.14 software through a nonlinear structural analysis [21,22], the choice of the Abaqus software is thanks to these great performances in the numerical analysis, Finite element modeling goes through several steps starting with the creation of a geometric model of the structure, then the integration of the behavior of the material and the boundary conditions for each element which is then divided into smaller forms elements connected to specific nodes (the mesh) and analysis should be performed [4,15,[23][24][25][26][27][28][29].…”