نتایج جستجو برای: mechanical properties of cortical bone

تعداد نتایج: 21248540  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1390

abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...

Journal: :Journal of musculoskeletal & neuronal interactions 2008
S M Bartell C M Isales C A Baile M J Kuhar M W Hamrick

The regulation of bone metabolism mediated by leptin is a complex process that is not clearly understood. Recent studies suggest that CART (cocaine-amphetamine related transcript) is a significant neuronal co-factor when combined with leptin. CART deficiency is thought to result in low trabecular bone mass, but since leptin exerts contrasting effects on trabecular and cortical bone it is possib...

In this study, mechanical properties and apatite formation ability of synthesized fluorapatite-hardystonite (FA-HT) nanocomposite scaffolds were investigated. Hardystonite (HT; 5 and 10 wt.%) as a reinforcement phase was incorporated into the FA scaffold. FA was mixed with HT for 4 h under argon gas at 220 °C. A space holder method was used for fabricating porous FA-HT scaffolds. Sodium chlorid...

Journal: :Journal of anatomy 2007
G A P Renders L Mulder L J van Ruijven T M G J van Eijden

Quantification of porosity and degree of mineralization of bone facilitates a better understanding of the possible effects of adaptive bone remodelling and the possible consequences for its mechanical properties. The present study set out first to give a three-dimensional description of the cortical canalicular network in the human mandibular condyle, in order to obtain more information about t...

2015
Mohammadjavad Freidouni Hossein Nejati Maryam Salimi Mohammad Bayat Abdollah Amini Mohsen Noruzian Mohammad Ali Asgharie Milad Rezaian

BACKGROUND Osteoporosis is a disease, which causes bone loss and fractures. Although glucocorticoids effectively suppress inflammation, their chronic use is accompanied by bone loss with a tendency toward secondary osteoporosis. OBJECTIVES This study took into consideration the importance of cortical bone in the entire bone's mechanical competence. Hence, the aim of this study was to assess t...

2010
L. Reig V. Amigó D. Busquets J. A. Calero

The excellent properties of Ti have resulted in its generalised use for bone implants. However, Ti is very stiff in comparison with human cortical bone, and this creates problems of bone weakening and loosening of the implant. This article discusses the mechanical properties (flexural and compressive strength, and stiffness) of porous Ti–6Al–4V specimens developed using the space holder method....

2011
Ekaterina Novitskaya Po-Yu Chen Elham Hamed Jun Li Vlado A. Lubarda Iwona Jasiuk Joanna McKittrick

In this review, recent advances on the measurement and modeling of elastic properties of cortical and trabecular bone are presented. Bone is a multifunctional material which among its other functions serves as a support for other tissues in the body. As a structural material it is stiff, strong, tough, lightweight and is adaptable. Its excellent mechanical properties are due to its complex, com...

Journal: :Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association 2007
Armelle Basillais Sabine Bensamoun Christine Chappard Barbara Brunet-Imbault Gérald Lemineur Brice Ilharreborde Marie-Christine Ho Ba Tho Claude-Laurent Benhamou

BACKGROUND The porosity of human cortical bone is one of the major parameters conditioning bone strength. The purpose of this study was to validate the characterization of human cortical bone microarchitecture using microcomputed tomography (microCT). To validate this microCT technique, the structural measurements were compared with other methods such as ultrasonic techniques and scanning elect...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده علوم 1388

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

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