Effects of freeze–thaw and micro-computed tomography irradiation on structure–property relations of porcine trabecular bone

2014 ◽  
Vol 47 (6) ◽  
pp. 1495-1498 ◽  
Author(s):  
Woowon Lee ◽  
Iwona Jasiuk
Keyword(s):  
Computed Tomography ◽  
Trabecular Bone ◽  
Structure Property ◽  
Micro Computed Tomography ◽  
Freeze Thaw ◽  
Property Relations

Cortical and trabecular bone parameters from HR-Pqct images at the Tibia: a local comparison with synchrotron radiation micro-computed tomography

2013 ◽  
Author(s):  
Agnes Ostertag ◽  
Francoise Peyrin ◽  
Sylvie Fernandez ◽  
Jean-Denis Laredo ◽  
Vernejoul Marie-Christine De ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Synchrotron Radiation ◽  
Trabecular Bone ◽  
Micro Computed Tomography ◽  
Bone Parameters ◽  
Local Comparison

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.

scholarly journals Detection of trabecular bone microdamage by micro-computed tomography

2007 ◽  
Vol 40 (15) ◽  
pp. 3397-3403 ◽  
Author(s):  
Xiang Wang ◽  
Daniel B. Masse ◽  
Huijie Leng ◽  
Kevin P. Hess ◽  
Ryan D. Ross ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Trabecular Bone ◽  
Micro Computed Tomography ◽  
Bone Microdamage

scholarly journals Investigating the Evolution of Fractures in Clay–based Ceramics During Repeated Freeze-Thawing Cycles Using Micro X-Ray Computed Tomography and Image Analysis

2020 ◽  
Author(s):  
Carlo Porfido ◽  
Roberto Rizzo ◽  
David Healy ◽  
Matteo Spagnuolo ◽  
Roberto Terzano ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Methodological Approach ◽  
Fracture Initiation ◽  
Micro Ct ◽  
Micro Computed Tomography ◽  
X Ray ◽  
Freeze Thaw ◽  
Fracture Length ◽  
Grain Distribution ◽  
Fracture Damage

<div><div><div><p>This work presents a study on the fracturing behaviour of a quartz tempered clay-based ceramic subjected to damage in freeze-thaw cycles. X-ray micro-computed tomography (micro-CT) provided high-resolution imaging of the ceramic before and during the freeze-thaw treatment, allowing to analyse a fully water-saturated sample using a special thermal stage designed to keep the sample frozen during analyses. Micro-CT 3D renderings showed the internal features of the specimen (i.e., quartz grain distribution), the increment of fracture count and size, and the detachment of ceramic and/or temper fragments from the edges of the sample over the cycles. Selected 2D micrographs, before and after freeze-thawing treatment, were analysed using the MATLAB toolbox FracPaQ. This software provided detailed data on fracture length, intensity, density, orientation and connectivity, and enabled to interpret the process of fracture initiation and propagation inside the material. These results showed that the temper plays a crucial role in ceramic fracturing behaviour under freeze- thawing conditions, as damage propagation is influenced by quartz grain distribution and orientation within the material. The study described in this work, not only offers new insights into the fracture dynamics of freeze-thawed clay-based ceramics, but also presents a new methodological approach to quantitatively measure fracture damage in porous materials.</p></div></div></div>

Trabecular Bone Ratio of Mandible Using Micro-Computed Tomography in Korean

2010 ◽  
Vol 21 (3) ◽  
pp. 920-924 ◽  
Author(s):  
Sung-Yoon Won ◽  
Sung-Hyun Kim ◽  
Sung-Tae Kim ◽  
Doo-Jin Paik ◽  
Wu-Chul Song ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Trabecular Bone ◽  
Micro Computed Tomography

scholarly journals Quantifying Subresolution 3D Morphology of Bone with Clinical Computed Tomography

2019 ◽  
Vol 48 (2) ◽  
pp. 595-605 ◽  
Author(s):  
S. S. Karhula ◽  
M. A. J. Finnilä ◽  
S. J. O. Rytky ◽  
D. M. Cooper ◽  
J. Thevenot ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Statistical Model ◽  
Trabecular Bone ◽  
Volume Fraction ◽  
Ex Vivo ◽  
Bone Volume ◽  
Micro Computed Tomography ◽  
Bone Volume Fraction ◽  
Model Combining ◽  
Occurrence Matrix

Abstract The aim of this study was to quantify sub-resolution trabecular bone morphometrics, which are also related to osteoarthritis (OA), from clinical resolution cone beam computed tomography (CBCT). Samples (n = 53) were harvested from human tibiae (N = 4) and femora (N = 7). Grey-level co-occurrence matrix (GLCM) texture and histogram-based parameters were calculated from CBCT imaged trabecular bone data, and compared with the morphometric parameters quantified from micro-computed tomography. As a reference for OA severity, histological sections were subjected to OARSI histopathological grading. GLCM and histogram parameters were correlated to bone morphometrics and OARSI individually. Furthermore, a statistical model of combined GLCM/histogram parameters was generated to estimate the bone morphometrics. Several individual histogram and GLCM parameters had strong associations with various bone morphometrics (|r| > 0.7). The most prominent correlation was observed between the histogram mean and bone volume fraction (r = 0.907). The statistical model combining GLCM and histogram-parameters resulted in even better association with bone volume fraction determined from CBCT data (adjusted R2 change = 0.047). Histopathology showed mainly moderate associations with bone morphometrics (|r| > 0.4). In conclusion, we demonstrated that GLCM- and histogram-based parameters from CBCT imaged trabecular bone (ex vivo) are associated with sub-resolution morphometrics. Our results suggest that sub-resolution morphometrics can be estimated from clinical CBCT images, associations becoming even stronger when combining histogram and GLCM-based parameters.

Microstructural study of the lunate in stage III Kienböck’s disease with micro-computed tomography imaging

2016 ◽  
Vol 42 (1) ◽  
pp. 71-77 ◽  
Author(s):  
G. Xiong ◽  
Z. Xiao ◽  
H. Wang ◽  
S. Guo ◽  
J. Tao
Keyword(s):  
Computed Tomography ◽  
Trabecular Bone ◽  
Bone Structure ◽  
Stage Iii ◽  
Micro Computed Tomography ◽  
Secondary Fracture ◽  
Kienböck’S Disease ◽  
Kienböck's Disease ◽  
Eventual Collapse ◽  
Kienbock’S Disease

Seventeen fresh lunates with stage III Kienböck’s disease were scanned with micro-computed tomography. Four regions of interest were selected to measure trabecular parameters, which were compared with those from normal lunates. Within the three regions in the distal surface, there was more compact trabecular bone in the middle region when compared with the palmar and dorsal regions. In the central part, the trabeculae of the Kienböck’s lunates were much thicker than those in normal lunates. The diameters of the palmar nutrient foramina of the Kienböck’s lunates were significantly smaller than those in normal lunates. In affected lunates, the bony disruptions were mostly located in the palmar or dorsal areas, which were shown from trabecular bone structure analysis to be structurally weaker. This leads to separation of the distal part of the fractured bone, disruption of the blood supply, poor bone remodelling and proneness to secondary fracture and eventual collapse.

scholarly journals The local and global geometry of trabecular bone

2020 ◽  
Author(s):  
Sebastien J.P. Callens ◽  
Duncan C. Tourolle né Betts ◽  
Ralph Müller ◽  
Amir A. Zadpoor
Keyword(s):  
Trabecular Bone ◽  
Geometric Approach ◽  
Tissue Growth ◽  
Structure Property ◽  
Micro Computed Tomography ◽  
Tissue Engineering Scaffolds ◽  
Minkowski Functionals ◽  
Global Geometry ◽  
Structure Property Relationships ◽  
Computed Tomography Images

AbstractThe organization and shape of the microstructural elements of trabecular bone govern its physical properties, are implicated in bone disease, and can serve as blueprints for biomaterial design. To devise fundamental structure-property relationships, it is essential to characterize trabecular bone from the perspective of geometry, the mathematical study of shape. Here, we used the micro-computed tomography images of 70 donors at five different sites to characterize the local and global geometry of human trabecular bone, respectively quantified by surface curvatures and Minkowski functionals. We find that curvature density maps provide sensitive shape fingerprints for bone from different sites. Contrary to a common assumption, these curvature maps also show that bone morphology does not approximate a minimal surface but exhibits a much more intricate curvature landscape. At the global (or integral) perspective, our Minkowski analysis illustrates that trabecular bone exhibits other types of anisotropy/ellipticity beyond interfacial orientation, and that anisotropy varies substantially within the trabecular structure. Moreover, we show that the Minkowski functionals unify several traditional morphometric indices. Our geometric approach to trabecular morphometry provides a fundamental language of shape that could be useful for bone failure prediction, understanding geometry-driven tissue growth, and the design of complex tissue engineering scaffolds.

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