TY - JOUR
T1 - Analysis of modified surface topographies of titanium-based hip implants using finite element method
AU - Vulović, Aleksandra
AU - Warchomicka, Fernando Gustavo
AU - Pixner, Florian
AU - Filipović, Nenad
N1 - Publisher Copyright:
© 2024 - IOS Press. All rights reserved.
PY - 2024/3/14
Y1 - 2024/3/14
N2 - BACKGROUND: In order to ensure the proper function of the cementless hip implant, the connection between the femoral bone and the implant has to be as strong as possible. According to experimental studies, implants with a rough surface reduce micro-movements between femoral bone and implant, which helps form a stronger connection between them. OBJECTIVE: The goal of this study was to analyze how half-cylinder surface topographies of different diameter values affect shear stress values and their distribution on the surface of the hip implant and trabecular femoral bone. METHODS: Nine models with different half-cylinder diameter values (200 μm, 400 μm, and 500 μm) and distances between half-cylinders were created for the analysis using the finite element method. Each model consisted of three layers: implant, trabecular, and cortical femoral bone. RESULTS: For all three diameter values, the highest shear stress value, for the implant layer, was located after the first half-cylinder on the side where force was defined. For the trabecular bone, the first half-cylinder was under lower amounts of shear stress. CONCLUSION: If we only consider shear stress values, we can say that models with 400 μm and 500 μm diameter values are a better choice than models with 100 μm diameter values.
AB - BACKGROUND: In order to ensure the proper function of the cementless hip implant, the connection between the femoral bone and the implant has to be as strong as possible. According to experimental studies, implants with a rough surface reduce micro-movements between femoral bone and implant, which helps form a stronger connection between them. OBJECTIVE: The goal of this study was to analyze how half-cylinder surface topographies of different diameter values affect shear stress values and their distribution on the surface of the hip implant and trabecular femoral bone. METHODS: Nine models with different half-cylinder diameter values (200 μm, 400 μm, and 500 μm) and distances between half-cylinders were created for the analysis using the finite element method. Each model consisted of three layers: implant, trabecular, and cortical femoral bone. RESULTS: For all three diameter values, the highest shear stress value, for the implant layer, was located after the first half-cylinder on the side where force was defined. For the trabecular bone, the first half-cylinder was under lower amounts of shear stress. CONCLUSION: If we only consider shear stress values, we can say that models with 400 μm and 500 μm diameter values are a better choice than models with 100 μm diameter values.
KW - Finite element analysis
KW - hip implant
KW - shear stress
KW - surface topography
UR - http://www.scopus.com/inward/record.url?scp=85188761173&partnerID=8YFLogxK
U2 - 10.3233/THC-230692
DO - 10.3233/THC-230692
M3 - Article
C2 - 37545288
AN - SCOPUS:85188761173
SN - 0928-7329
VL - 32
SP - 1123
EP - 1133
JO - Technology and Health Care
JF - Technology and Health Care
IS - 2
ER -