Determination of Trabecular Bone Tissue Elastic Properties by Comparison of Experimental and Finite Element Results

1997 ◽  
pp. 183-192 ◽  
Author(s):  
B. Van Rietbergen ◽  
J. Kabel ◽  
A. Odgaard ◽  
R. Huiskes
Keyword(s):  
Finite Element ◽  
Trabecular Bone ◽  
Bone Tissue ◽  
Elastic Properties ◽  
Trabecular Bone Tissue

Bone tissue loads around titanium femoral implant and coated with porous layer

2018 ◽  
Vol 2 (90) ◽  
pp. 77-84
Author(s):  
G. Bobik ◽  
J. Żmudzki ◽  
K. Majewska
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Porous Material ◽  
Trabecular Bone ◽  
Cortical Bone ◽  
Bone Tissue ◽  
The Finite Element Method ◽  
Porous Shell ◽  
Cementless Implant ◽  
Trabecular Bone Tissue

Purpose: Difference in the mechanical properties of bone and stiffer femoral implant causes bone tissue resorption, which may result in implant loosening and periprosthetic fractures. The introduction of porous material reduces the stiffness of the implant. The aim of the study was to analyse the influence of porous shell of femoral revision implant on bone tissue loading distribution with use the finite element method. Design/methodology/approach: Load transfer in the femur has been investigated using the finite element method (Ansys). Cementless implant models were placed in the anatomical femur model. Femur model included sponge bone and cortical bone. The solid implant was compared with the implant containing porous material in 70% in outer layer with a thickness of 2 mm. Load of 1500 N during gait was simulated. In addition, the forces of the ilio-tibial band and the abductor muscles were implemented, as well as the torque acting on the implant. Findings: Increase of stress for the porous model was found. The underload zones in bone have been reduced. Loading distribution was slightly more favourable, albeit rather in cortical bone. Stress value in cancellous bone around cementless implant margin has increased to a level that is dangerous for bone loss. Stress in the implant was not dangerous for damage. The stress distribution was different in the implant neck zone where the porous shell borne a little less load and high stress was shifted to the stiffer core. Research limitations/implications: Variable conditions for fitting the stem to the bone as well as the friction conditions were not investigated. Practical implications: Stress values in the spongy bone around the insertion edge of the cementless implant are consistent with long-term clinical results of the bone atrophy in 1 and 2 Gruen`s zones around the fully porous implants. Originality/value: The advantage of fully porous coated implant was the decrease of risk of trabecular bone tissue resorption around the implant tip and the increase of risk of trabecular bone tissue resorption around insertion edge of the implant.

A decreased subchondral trabecular bone tissue elastic modulus is associated with pre-arthritic cartilage damage

2001 ◽  
Vol 19 (5) ◽  
pp. 914-918 ◽  
Author(s):  
J. S. Day ◽  
M. Ding ◽  
J. C. van der Linden ◽  
I. Hvid ◽  
D. R. Sumner ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Trabecular Bone ◽  
Bone Tissue ◽  
Cartilage Damage ◽  
Trabecular Bone Tissue

Characterizing the Trabecular Bone Tissue of the Toco Toucan Bill

2018 ◽  
Author(s):  
Cesar H. Comin ◽  
Matheus P. Viana ◽  
Barbara Henning ◽  
Sergio F. dos Reis ◽  
Thais M.P. dos Santos ◽  
...  
Keyword(s):  
Trabecular Bone ◽  
Bone Tissue ◽  
Trabecular Bone Tissue

Surface Finite Element for Imperfect Interface Modeling in Elastic Properties Homogenization

2020 ◽  
Vol 833 ◽  
pp. 101-106
Author(s):  
Alexander Pavlovich Sokolov ◽  
Vitaliy Nikolaevich Schetinin ◽  
Mikhail Yurievich Kozlov
Keyword(s):  
Finite Element ◽  
Elastic Properties ◽  
Numerical Experiments ◽  
Averaging Method ◽  
Jump Condition ◽  
Imperfect Interface ◽  
Adhesion Layer ◽  
Interface Modeling ◽  
Asymptotic Averaging

The paper presents a mathematical model of a finite element for modeling imperfect interface conditions for two contacting surfaces. The element is used in the numerical implementation of the Asymptotic Averaging Method (AAM) for the determination of effective elastic properties of composite materials under investigation. Numerical experiments are carried out to calculate the elastic properties taking into account the adhesion layer using a displacements field jump condition at the phase boundary. Results are compared with adhesion modeling using an additional bulk phase.

The elastic moduli and fatigue properties of canine trabecular bone tissue

2001 ◽  
Vol 15 (7) ◽  
pp. 1022-1031
Author(s):  
Kuiwon Choi ◽  
Gon Khang ◽  
Steven A. Goldstein
Keyword(s):  
Trabecular Bone ◽  
Bone Tissue ◽  
Elastic Moduli ◽  
Fatigue Properties ◽  
Trabecular Bone Tissue
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