Three-dimensional-printed replica models of bone for experimentally decoupling trabecular bone properties contribution to ultrasound propagation parameters

2021 ◽  
Vol 149 (1) ◽  
pp. 296-306
Author(s):  
Tsirigotis Athanasios ◽  
Apostolopoulos Konstantinos ◽  
Deligianni Despoina
Keyword(s):  
Trabecular Bone ◽  
Three Dimensional ◽  
Ultrasound Propagation ◽  
Bone Properties ◽  
Propagation Parameters

Finite Element Simulation of Ultrasound Propagation in Trabecular Bone

2013 ◽  
Author(s):  
Behzad Vafaeian ◽  
Yuchin Wu ◽  
Michael R. Doschak ◽  
Marwan El-Rich ◽  
Tarek El-Bialy ◽  
...  
Keyword(s):  
Finite Element ◽  
Numerical Modeling ◽  
Wave Propagation ◽  
Trabecular Bone ◽  
Quantitative Ultrasound ◽  
Three Dimensional ◽  
Osteoporotic Bone ◽  
Ultrasound Propagation ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Quantitative ultrasound is used to identify healthy versus osteoporotic bone. However the physics of ultrasound propagation in trabecular media is still not sufficiently understood. This lack of understanding is reported to be an obstacle in further development of this bone assessment technique. Numerical models of wave propagation stand as a potentially successful tool to explain the various experimental observations. The main issue in the numerical modeling of wave propagation in trabecular bone is the complex geometry of the trabecular structures surrounded by a fluid (bone marrow). So far, the complex geometrical domain of trabecular structures has been approximated by finite difference grids for wave propagation analyses. In this work, numerical simulation of ultrasound propagation into trabecular bone sample is performed using the finite element method (FEM). A new procedure for numerical modeling of trabecular bone tailored for the FEM is introduced. The entire complex trabecular geometries of two cubic bone samples are reconstructed using computed microtomography data. For the first time a three dimensional finite element mesh using tetrahedral elements is generated for the two-phase medium of a trabecular bone. Separate meshes for the bony part and the filling marrow (considered as non-viscous water) are generated and acoustic-structure interaction condition is imposed on their interface. It is shown that the three-dimensional simulation using the FEM can predict ultrasound propagation phenomena observed in experiments: linear dependency of attenuation on frequency, the effect of bone volume on the attenuation and speed of sound, and the propagation of fast and slow waves. Moreover, the broadband ultrasound attenuation (BUA) for two ultrasonic signals propagating into a healthy and an osteoporotic sample are compared. A distinguishable difference in BUA between the two samples is observed expressing lower BUA for osteoporotic bone. Our developed model is the first three-dimensional finite element analysis model to compare the ultrasound propagation in healthy versus osteoporotic bone. The developed model can be further utilized as a tool to explain various experimental observations of quantitative ultrasound of bone.

The Effect of Trabecular Bone on the Mechanical Response of Human Mandible with Implant

2014 ◽  
Vol 695 ◽  
pp. 588-591
Author(s):  
Khairul Salleh Basaruddin ◽  
Ruslizam Daud
Keyword(s):  
Computed Tomography ◽  
Finite Element ◽  
Trabecular Bone ◽  
Static Analysis ◽  
Load Distribution ◽  
Mechanical Response ◽  
Three Dimensional ◽  
Fe Model ◽  
Micro Computed Tomography ◽  
Bone Specimen

This study aims to investigate the influence of trabecular bone in human mandible bone on the mechanical response under implant load. Three dimensional voxel finite element (FE) model of mandible bone was reconstructed from micro-computed tomography (CT) images that were captured from bone specimen. Two FE models were developed where the first consists of cortical bone, trabecular bone and implants, and trabecular bone part was excluded in the second model. A static analysis was conducted on both models using commercial software Voxelcon. The results suggest that trabecular bone contributed to the strength of human mandible bone and to the effectiveness of load distribution under implant load.

A Methodology for Mechanical Measurements of Technical Constants of Trabecular Bone

1988 ◽  
Vol 17 (4) ◽  
pp. 169-173 ◽  
Author(s):  
L H Yahia ◽  
G Drouin ◽  
P Duval
Keyword(s):  
Trabecular Bone ◽  
Three Dimensional ◽  
Lumbar Vertebrae ◽  
Bony Tissue ◽  
Ultrasonic Methods ◽  
Vertebral Trabecular Bone ◽  
Young’S Moduli ◽  
Orthotropic Properties ◽  
First Time ◽  
Non Destructive

Vertebral trabecular bone was tested by non-destructive uniaxial and triaxial loadings with the purpose of investigating the orthotropic properties of bone. A triaxial testing apparatus using hydrostatic pressure was developed and allowed to characterise the bony tissue in a three-dimensional stressed state. Thirty specimens, in the form of 10 mm cubes, were tested. The Young's moduli obtained in this study for the trabecular bone of human lumbar vertebrae are found to be in agreement with the values obtained by ultrasonic methods. Analyses of triaxial compressive tests provided, for the first time, the Poisson's ratios of vertebral trabecular bone. These values are found to satisfy thermodynamic restrictions established by Cowin and Van Buskirk (1986). Finally, no significant differences in the material properties were found for segment level (L3-L4).

406 Three-dimensional Human Trabecular Bone Structure Analysis Using MRI

2009 ◽  
Vol 2008.21 (0) ◽  
pp. 149-150
Author(s):  
Makoto SAKAMOTO ◽  
Yusuke HIGO ◽  
Keisuke SASAGAWA ◽  
Koichi KOBAYASHI ◽  
Hidenori YOSHIDA
Keyword(s):  
Trabecular Bone ◽  
Structure Analysis ◽  
Bone Structure ◽  
Three Dimensional ◽  
Trabecular Bone Structure ◽  
Human Trabecular Bone
Sign in / Sign up

Export Citation Format

Share Document