scholarly journals Age-related factors affecting the postyield energy dissipation of human cortical bone

2007 ◽  
Vol 25 (5) ◽  
pp. 646-655 ◽  
Author(s):  
Jeffry S. Nyman ◽  
Anuradha Roy ◽  
Jerrod H. Tyler ◽  
Rae L. Acuna ◽  
Heather J. Gayle ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Cortical Bone ◽  
Related Factors ◽  
Factors Affecting ◽  
Human Cortical Bone ◽  
Age Related

Progressive Energy Dissipations of Human Cortical Bone in Compression

2008 ◽  
Author(s):  
Huijie Leng ◽  
Xuanliang Dong ◽  
Xiaodu Wang
Keyword(s):  
Energy Dissipation ◽  
Cortical Bone ◽  
Bone Quality ◽  
Bone Fracture ◽  
Maximum Stress ◽  
Factors Affecting ◽  
Age Related ◽  
Significant Burden ◽  
Underlying Mechanisms ◽  
Loading Modes

Bone fracture has imposed a significant burden on the health of society. The “bone quality” is used to refer to factors affecting bone fracture risk [1]. Energy dissipation till fracture, known as toughness, is a major measure of bone quality [2]. However, underlying mechanisms of energy dissipation in bone is still not clear. It has been well documented that the post-yield behavior of bone determines the major part of the toughness of bone [3, 4]. Therefore, it is important to study post-yield behaviors of human bone, especially the different pathways for energy dissipation, in order to better understand how age-related change affects bone quality. Bone behaves differently under different loading modes [5]. Different from loading in tension, after reaching the maximum stress, cortical bone in compression can continue to bear load till large deformation without brittle failure and dramatic reduction in elastic modulus [5, 6]. However, few studies of progression of post-yield behaviors of cortical bone in compression were reported in the literature.

scholarly journals Predictors of Blood Pressure in Iranian Women- A Narrative Review

2020 ◽  
Author(s):  
Maryam Etaat ◽  
Zohre Tabatabaye ◽  
Samaneh Motamed Jahromi ◽  
Poneh Yosefi ◽  
Sadegh Sedigh ◽  
...  
Keyword(s):  
Blood Pressure ◽  
High Stress ◽  
Narrative Review ◽  
Iranian Women ◽  
Related Factors ◽  
Factors Affecting ◽  
Waist Size ◽  
Age Related ◽  
Diet And Exercise ◽  
Important Health

Introduction: hypertension is one of the most important health problems in the world and in developing countries, including Iran. The prevalence of hypertension among Iranian women is higher than men. This study aimed to investigate the predictive causes of hypertension among Iranian women. This study was a narrative review that was conducted by searching related studies and resources in databases of Google Scholar, SID, Pubmed, Magiran, Web of Science, and Scopus. Finally, 49 qualified articles were analyzed and the texts were reviewed. Based on the obtained data, the predictors of hypertension among Iranian women included the underlying factors of obesity (diet and exercise), psychosocial factors (stress, occupation and addiction) and age-related factors. Conclusion:  Obesity and increased waist size had a greater role in high blood pressure in Iranian women. After obesity, age and factors affecting them, lack of exercise, high stress, occupational factors, education, and addiction can also influence high blood pressure.As a result, it can be predicted that by identifying the risk factors, hypertension can be reduced among Iranian women; by teaching the causes and methods of preventing hypertension to the Iranian women as well as screening for timely diagnose and treatment, hypertension could be decreased among Iranian women.

In vivo quantification of age-related changes in human cortical bone thickness and porosity by HR-pQCT

Bone ◽  
2009 ◽  
Vol 44 ◽  
pp. S22
Author(s):  
K.K. Nishiyama ◽  
H.M. Macdonald ◽  
H.R. Buie ◽  
D.A. Hanley ◽  
S.K. Boyd
Keyword(s):  
Cortical Bone ◽  
Bone Thickness ◽  
Cortical Bone Thickness ◽  
Human Cortical Bone ◽  
Age Related ◽  
Age Related Changes

scholarly journals Interactions Between Different Age-Related Factors Affecting Balance Control in Walking

2020 ◽  
Vol 2 ◽  
Author(s):  
Hendrik Reimann ◽  
Rachid Ramadan ◽  
Tyler Fettrow ◽  
Jocelyn F. Hafer ◽  
Hartmut Geyer ◽  
...  
Keyword(s):  
Balance Control ◽  
Related Factors ◽  
Factors Affecting ◽  
Age Related

Age-Related Changes of Noncalcified Collagen in Human Cortical Bone

2003 ◽  
Vol 31 (11) ◽  
pp. 1365-1371 ◽  
Author(s):  
Xiaodu Wang ◽  
Xiaoe Li ◽  
Xinmei Shen ◽  
C. Mauli Agrawal
Keyword(s):  
Cortical Bone ◽  
Human Cortical Bone ◽  
Age Related ◽  
Age Related Changes

An age-related decrease in the concentration of insulin-like growth factor binding protein-5 in human cortical bone

1995 ◽  
Vol 57 (3) ◽  
pp. 206-212 ◽  
Author(s):  
V. Nicolas ◽  
S. Mohan ◽  
Y. Honda ◽  
A. Prewett ◽  
R. D. Finkelman ◽  
...  
Keyword(s):  
Growth Factor ◽  
Cortical Bone ◽  
Binding Protein ◽  
Insulin Like Growth Factor ◽  
Factor Binding ◽  
Human Cortical Bone ◽  
Age Related

The Characterization and Comparison of Human Cortical Bone and Teeth Structural Changes by Low Field NMR

2009 ◽  
Author(s):  
Qingwen Ni ◽  
Shuo Chen
Keyword(s):  
Relaxation Time ◽  
Porous Materials ◽  
Cortical Bone ◽  
Structural Changes ◽  
Bone Matrix ◽  
Proton Spin ◽  
Invasive Technique ◽  
Pore Sizes ◽  
Human Cortical Bone ◽  
Age Related

It is known that NMR proton spin-spin (T2) or spin-lattice (T1) relaxation time measurements and analytical processing techniques have been used to determine microstructural characteristics of various types of fluid filled porous materials with characteristic pore sizes ranging from sub-micron to sub-millimeter. Currently this method has been developed and applied to quantify the porosity, pore size distribution and microdamage in human cortical bone [1–3]. The observed proton NMR relaxation signals are a convolution of the relaxation of fluid in the pores throughout the observed system with the longer relaxation time corresponding to larger pore sizes. Thus, regions within the bone matrix in which fluid may accumulate can effectively be treated as a “pore” and will be manifest as a change in the relaxation signal. Deconvolution of the relaxation signal can provide quantitative information about the relaxation distributions of fluid inside bone, i.e., the distribution of water within bone tissue. Since teeth are comprised of fluid-filled porous materials, and dentin is like bone, we also applied this rapid, non-destructive and non-invasive technique to detect and quantify age-related teeth structural changes particularly for both dentin and pulp based on broadline pulsed NMR.

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