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Alloys (4):
Recent article
Alloys
Acta Biomaterialia (7)8 2011
Abstract
We investigated the microstructures, Young's moduli, and tensile properties of metastable Ti-30Zr-(Cr, Mo) alloys subjected to solution treatment (ST) and cold rolling (CR). All the alloys comprise a β phase and small athermal ω phase, and they exhibit low Young's moduli after ST. During CR, defor...
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PMID: 21569873
PDF is available here.
PDF is available here.
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Acta Biomaterialia (7)1 2011
Abstract
We therefore aimed to investigate whether bone-implant interface strength and osseointegration of a novel biodegradable magnesium alloy (Mg-Y-Nd-HRE, based on WE43) is comparable to that of a titanium control (Ti-6Al-7Nb) currently in clinical use. Biomechanical push-out testing, microfocus computed...
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PMID: 20804867
PDF is available here.
PDF is available here.
Abstract
We have developed a rapid visual in vitro assay to detect toxicity mediated by individual WA particles in cultured L6-C11 rat muscle cells. Using a variety of techniques (histology, comet assay, caspase-3 activity, oxidation of 2'7'-dichlorofluorescin to measure the production of reactive oxygen spe...
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PMID: 20934443
PDF is available here.
PDF is available here.
Zhongguo Xiufu Chongjian Waike Zazhi/Chinese Journal of Reparative and Reconstructive Surgery (24)10 2010
Abstract
To design an open shape memory alloy artificial vertebral body that can be used to reconstruct the vertebral body in spine diseases, such as thoracic-lumbar spine tumors, burst fracture of the vertebrae, kyphosis and scoliosis, and to evaluate the biomechanical stability of lumbar functional segment...
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PMID: 21046802
PDF is available here.
PDF is available here.
Abstract
We have developed an inferior vena cava (IVC) occluder that can safely and conveniently drain blood from the IVC. This device has been clinically applied in one patient, as described herein. The framework for this device is made from a single superelastic nitinol wire, 0.30 mm in diameter. Diameter...
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PMID: 20166838
PDF is available here.
PDF is available here.
Abstract
We thermodynamically evaluated the quantitative removal limit of impurities during the remelting of aluminum scrap; all relevant parameters, such as the total pressure, the activity coefficient of the target impurity, the temperature, the oxygen partial pressure, and the activity coefficient of oxid...
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PMID: 20536230
PDF is available here.
PDF is available here.
Abstract
In the biomedical field, palladium has primarily been used as a component of alloys for dental prostheses. However, recent research has shown the utility of palladium alloys for devices such as vascular stents that do not distort magnetic resonance images. Dental palladium alloys may contain minor o...
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PMID: 20583886
PDF is available here.
PDF is available here.
Abstract
A limited number of reports exist regarding the systematic investigation or comparison of the fatigue strength of titanium alloys for medical devices, including plain, fretting and notch fatigue, for improvement through various treatments and processes, with respect to related microstructures. This...
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PMID: 20583885
PDF is available here.
PDF is available here.
Abstract
Magnesium alloy stent has been employed in animal and clinical experiment in recent years. It has been verified to be biocompatible and degradable due to corrosion after being implanted into blood vessel. Mg-Y-Gd-Nd alloy is usually used to construct an absorbable magnesium alloy stent. However, the...
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PMID: 20352299
PDF is available here.
PDF is available here.
Abstract
Biocorrosion properties and blood- and cell compatibility of pure iron were studied in comparison with 316L stainless steel and Mg-Mn-Zn magnesium alloy to reveal the possibility of pure iron as a biodegradable biomaterial. Both electrochemical and weight loss tests showed that pure iron showed a re...
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PMID: 20396936
PDF is available here.
PDF is available here.
Abstract
To demonstrate the feasibility of seeding a self-expanding metal stent with endothelial progenitor cells to enhance rapid reendothelialization, which is postulated to prevent local thrombus formation and restenosis after vascular intervention.
Endothelial progenitor cells and fibrinogen were isolate...
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PMID: 20610181
PDF is available here.
PDF is available here.
Abstract
We assessed the in vitro biocompatibility of EBM titanium-6 aluminum-4 vanadium (Ti6Al4V) structures by comparing the cellular response to solid polished, solid unpolished, and porous EBM discs to the cellular response to discs made of commercially produced Ti6Al4V. The discs were seeded with 20,000...
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PMID: 20447856
PDF is available here.
PDF is available here.
Abstract
Highly ordered nanotube oxide layers were developed on low rigidity quaternary beta-type Ti-35Nb-5Ta-7Zr alloy by controlled anodic oxidation in electrolyte containing 1 M H3PO4 and 0.5 wt% NaF at room temperature. The diameters of the nanotubes formed were in the range of 30 to 80 nm. Electrochemic...
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PMID: 21128470
PDF is available here.
PDF is available here.
Abstract
Ti-30Nb-xZr and Ti-30Ta-xNb alloys have been investigated using various methods of surface nanotube formation. Ternary Ti-30Nb-xZr (x = 3 and 15 wt%) and Ti-30Ta-xNb (x = 3 and 15 wt%) alloys were prepared by using high-purity sponge Ti (Grade 4, G&S Titanium, USA), Ta, Zr and Nb spheres. The two gr...
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PMID: 21128479
PDF is available here.
PDF is available here.
Abstract
In the current recycling system of end-of-life (EoL) appliances, which is based on shredding, alloying elements tend to end up in the scrap of base metals. The uncontrolled mixing of alloying elements contaminates secondary metals and calls for dilution with primary metals. Active disassembling fast...
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PMID: 20476783
PDF is available here.
PDF is available here.
Abstract
Stent placement was successful in all patients without hospital mortality. No significant differences in patient discomfort and complications were observed between the Ultraflex stent and Choostent groups. The median follow-up time was 6 mo (inter-quartile range 3-16 mo). Endoscopic reintervention w...
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PMID: 20458763
PDF is available here.
PDF is available here.
Journal of Biomechanics (43)7 2010
Abstract
We assessed fretting wear of polyethylene against metal as a function of metal surface finish, alloy, and micromotion amplitude, using a three-station pin-on-disc fretting wear simulator. Overall, the greatest reduction in polyethylene wear was achieved by highly polishing the metal surface. For exa...
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PMID: 20172525
PDF is available here.
PDF is available here.
Laryngo-Rhino-Otologie (89)5 2010
Abstract
SUPERELASTIC NITINOL STAPES PROSTHESESINTRODUCTION: Many different prostheses are available for stapes surgery. The newly designed Nitinol piston band-shaped stapes prosthesis could minimize postoperative complications due to its new superelastic characteristic and design.
A stapedectomy and implant...
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PMID: 20221983
PDF is available here.
PDF is available here.
Abstract
In sliding mechanics, the strongly superelastic closed-coil springs with preactivation are recommended. In addition, we found that the oral environment seems to have only a minor influence on their mechanical properties.
Copyright (c) 2010 American Association of Orthodontists. Published by Mosby, I...
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PMID: 20451787
PDF is available here.
PDF is available here.
Abstract
Biomaterials (31)13 2010
Abstract
We study the initial stages of oxide growth on the (110) surface of the NiTi alloy to understand the formation of alloy/oxide interface. We initially adsorb atomic and molecular oxygen on the (110) surface and then successively add O(2) molecules, up to 2 monolayer of O(2). Oxygen adsorption always...
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PMID: 20144474
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
In the present study, the density functional theory implemented in the Vienna Ab-initio Simulation Package has been used to investigate the alloying effects of different elements of calcium, zinc, yttrium, aluminum and iron when introduced in the Mg crystal lattice. In particular, studies have been...
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PMID: 19683600
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
Magnesium alloys have attracted increasing interest in the past years due to their potential as implant materials. This interest is based on the fact that magnesium and its alloys are degradable during their time of service in the human body. Moreover magnesium alloys offer a property profile that i...
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PMID: 19788945
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
The corrosion behaviour of AZ31 magnesium alloy with different grain sizes immersed in simulated body fluids was compared in chloride solution (8 gl(-1)) and in phosphate-buffer solution (PBS). The influence of immersion time was also analyzed. Electrochemical techniques such as open circuit potenti...
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PMID: 19446048
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
Degradable magnesium alloys for biomedical application are on the verge of being used clinically. Rare earth elements (REEs) are used to improve the mechanical properties of the alloys, but in more or less undefined mixtures. For some elements of this group, data on toxicity and influence on cells a...
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PMID: 19800429
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
A design strategy deployed in developing new biodegradable Mg-Y-Zn alloys is summarized and the key factors influencing their suitability for medical applications are described. The Mg-Y-Zn alloys reveal microstructural features and mechanical characteristics expected to be appropriate for vascular...
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PMID: 19815099
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
The aim of this study was to investigate whether the extruded magnesium alloy LAE442 reacts in vivo with an appropriate host response and to investigate how an additional magnesium fluoride (MgF(2)) coating influences the in vivo corrosion rate. Forty cylinders were machined from extruded LAE442 and...
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PMID: 19822226
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
We show that tetrazolium-salt-based assays, which are widely used in practice, are influenced by the corrosion products of Mg-based alloys. Corroded Mg converts tetrazolium salts to formazan, leading to a higher background and falsifying the results of cell viability. Tetrazolium-based assays are th...
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PMID: 19837191
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
Biodegradable stents have shown their potential to be a valid alternative for the treatment of coronary artery occlusion. This new class of stents requires materials having excellent mechanical properties and controllable degradation behaviour without inducing toxicological problems. The properties...
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PMID: 19941977
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
The aim of this work was to collect and compare data from different published reports which focused on the description of the influence of different electrochemical setups for the assessment of magnesium corrosion. Based on this, a comparison with our own results, obtained for LAE 442 and AZ 31, was...
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PMID: 20051271
PDF is available here.
PDF is available here.
Acta Biomaterialia (6)5 2010
Abstract
Acta Cardiologica (65)2 2010
Abstract
Posteroseptal accessory pathways are sometimes resistant to ablation because of the complex anatomy of this region. Ex-vivo experiments have demonstrated that gold-tip radiofrequency ablation catheters create deeper lesions than conventional platinum-iridium tip catheters. This case of a 62-year-old...
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PMID: 20458841
PDF is available here.
PDF is available here.
Abstract
Designing materials having suitable mechanical properties and targeted degradation behavior is the key for the development of biodegradable materials for medical applications, including stents. A series of Fe-Mn alloys was developed with the objective to obtain mechanical properties similar to those...
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PMID: 19437432
PDF is available here.
PDF is available here.
Abstract
We study in vitro evaluation of needle artefacts and image quality for musculoskeletal laser-interventions in an open high-field magnetic resonance imaging (MRI) scanner at 1.0T with vertical field orientation. Five commercially available MRI-compatible puncture needles were assessed based on artefa...
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PMID: 19705200
PDF is available here.
PDF is available here.
Abstract
We evaluated these risks for aneurysm clips.
Three different MP35N aneurysm clips (Codman Slim-Line Aneurysm Clip, straight, blade length 25-mm; Codman Slim-Line Aneurysm Clip Graft, 5-mm diameter x 5-mm width; Codman Slim-Line Aneurysm Clip, reinforcing 30 degrees angle, 6-mm x 18-m...
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PMID: 20037131
PDF is available here.
PDF is available here.
Abstract
The mean period of follow-up was 28 months (range 20 to 38 months). All the cases obtained bone union in average 3.3 months (from 3 to 4.5 months). There were no complications such as deep infection, deep vein thrombosis, pulmonary embolism and bone nonunion. The results of clinical evaluation accor...
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PMID: 20486383
PDF is available here.
PDF is available here.
Abstract
The patient was a man who had suffered from repeated pneumothoraces since August 2003, when he was 16 years old. A right pneumothorax was observed at age 21 years, in April 2008. At the same time, a dry cough began to appear and diffuse small nodular shadows in both lung fields were found on a chest...
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PMID: 20432968
PDF is available here.
PDF is available here.
Abstract
The near-infrared (NIR)-emitting CdSeTe alloyed quantum dots (AQdots) that capped with L-cysteine were applied for ultrasensitive Cu(2+) sensing. The sensing approach was based on the fluorescence of the AQdots selectively quenched in the presence of Cu(2+). Experimental results showed a low interfe...
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PMID: 20152468
PDF is available here.
PDF is available here.
Abstract
We have developed a flow apparatus to assess the biophysical strength of cell attachment to biomaterials used in ITAP. We have demonstrated that dermal fibroblast attachment strength increases significantly up to 96 h and that data from direct and indirect methods of assessing cell attachment streng...
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PMID: 19296546
PDF is available here.
PDF is available here.
Abstract
Abstract
We implanted into one porcine cadaveric spine different test spacers made of magnesium, titanium, and CFRP. All test spacers were scanned using two T1-TSE MRI sequences. The artifact dimensions were traced on all scans and statistically analyzed.
The total artifact volume and median...
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PMID: 19693644
PDF is available here.
PDF is available here.
Abstract
With the focus on combating hospital-acquired infection never greater, debate over the respective merits of using silver ion and copper-based anti-microbial surface treatments to "beat the bugs" will no doubt continue as new study evidence emerges for each. Health Estate Journal high...
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PMID: 20198956
PDF is available here.
PDF is available here.
Abstract
Systematic studies of protein adsorption onto metallic biomaterial surfaces are generally lacking. Here, combinatorial binary library films with compositional gradients of Ti(1-x)Cr(x), Ti(1-x)Al(x), Ti(1-x)Ni(x) and Al(1-x)Ta(x), (0
PDF is available here.
PDF is available here.
Surgical Endoscopy (24)2 2010
Endoscopic closure of gastric access in perspective NOTES: an update on techniques and technologies.
Abstract
Achieving reliable closure of the hollow organ defect represents the first step towards implementation of clinical NOTES. The current data do not yet allow definitive and clear advantages or disadvantages of the different options to be determined. The introduction of the EURONOTES registry will help...
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PMID: 19565295
PDF is available here.
PDF is available here.
Abstract
We report a retrospective review of a series of five sequential patients undergoing placement of Resonance (Cook Medical, Bloomington, IN) metallic ureteral stents for extrinsic ureteral compression refractory to placement of traditional (polymer) ureteral stents. Of five patients reviewed, three (6...
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PMID: 20730376
PDF is available here.
PDF is available here.
Abstract
Rapid generation of reactive oxygen species (ROS) may occur in response to cellular contact with metal particles. Generation of ROS by cobalt and/or tungsten carbide is implicated in causing hard metal lung disease (HMD) and allergic contact dermatitis (ACD). In this study, ROS generation and partic...
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PMID: 19904657
PDF is available here.
PDF is available here.
Abstract
The results from this first-in-man study indicate good safety and short to medium term efficacy profile of the Misago nitinol stent....
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PMID: 20142219
PDF is available here.
PDF is available here.
Abstract
Nitinol Micro-SX self-expanding stents might be a valuable approach to seal high risk atherosclerotic lesions....
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PMID: 20142227
PDF is available here.
PDF is available here.
Abstract
Rotational cine runs in the left-right and cranial-caudal directions should be mandatory in the clinical assessment of the structural integrity of the CoreValve frame. No frame fractures were identified in 58 patients implanted with the Medtronic CoreValve device with 2-year mean follow-up....
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PMID: 20142218
PDF is available here.
PDF is available here.
Abstract
This study was aimed at studying the effect of contact with titanium alloy plates of different surface textures on the proliferative capability of mouse osteoblastic MC3T3-E1 cells. First, the proliferation characteristics of MC3T3-E1 cells were investigated. MC3T3-E1 cells showed a high capacity fo...
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PMID: 20133972
PDF is available here.
PDF is available here.
Khirurgiia ()2 2010
Abstract
Nitinol self-expanding stents were used in treatment of 15 patients with blastomatous lesions of biliopancreatoduodenal zone. Stenting was successful in all cases, long-term results were obtained in all patients. Death occurred in 8 patients within 5,5-11 month after stent insertion. 7 patients rema...
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PMID: 20360675
PDF is available here.
PDF is available here.
Abstract
An overview of the methods of fixation of the skull bones is presented,as well as discussion and characterization of different methods of fixation. A new system of fixation of the skull bones was used in osseous-plastic trepanation and reconstructive operations using nitinol craniofixators. Results...
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PMID: 20552795
PDF is available here.
PDF is available here.
Abstract
We describe a case of native coarctation of aorta managed with three self-expandable nitinol stents. After balloon pre-dilation, the first and second stents were dislodged. The coarcted area was successfully treated with the third stent overlapped with the previous stents. During follow up (30 month...
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PMID: 20515860
PDF is available here.
PDF is available here.
Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologie (51)1 2010
Abstract
The shape memory alloys exhibit a number of remarkable properties, which open new possibilities in engineering and more specifically in biomedical engineering. The most important alloy used in biomedical applications is NiTi. This alloy combines the characteristics of the shape memory effect and sup...
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PMID: 20191135
PDF is available here.
PDF is available here.
Abstract
This study shows first in vitro tests of a nitinol based vein cuff developed for external valvuloplasty. In contrary to currently existing vein cuffs the tested model enables minimal invasive implantation and also maintains its round pre-shaped profile at body temperature (37 degrees C). The examina...
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PMID: 20675918
PDF is available here.
PDF is available here.
Abstract
Recent studies have shown the potential suitability of magnesium alloys as biodegradable implants. The aim of the present study was to compare the soft tissue biocompatibility of MgCa0.8 and commonly used surgical steel in vivo.
A biodegradable magnesium calcium alloy (MgCa0.8) and surgical steel (S...
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PMID: 20974008
PDF is available here.
PDF is available here.
Romanian journal of morphology and embryology = Revue roumaine de morphologie et embryologie (51)2 2010
Abstract
We used SolidWorks software. The small sizes of the modules enable the surgeon to make small incisions, using surgical techniques minimally invasive, having the following advantages: reduction of soft tissues destruction; eliminating intra-operator infections; reduction of blood losses; the reductio...
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PMID: 20495750
PDF is available here.
PDF is available here.
Abstract
Porous titanium (Ti) and Ti alloys are important scaffold materials for bone tissue engineering. In the present study, a new type of porous Ti alloy scaffold with biocompatible alloying elements, that is, niobium (Nb) and zirconium (Zr), was prepared by a space-holder sintering metho...
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PMID: 19705960
PDF is available here.
PDF is available here.
Abstract
We sought to evaluate the CMR characteristics of both currently commercially available transcatheter heart valves (Edwards SAPIEN™, Medtronic CoreValve®) including their dedicated delivery devices and of a custom-built, CMR-compatible delivery device for the Medtronic CoreValve® prosthesis as an...
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PMID: 20942968
PDF is available here.
PDF is available here.
Abstract
The electrochemical behavior of potential orthopedic Mg-Ca, AZ31 and AZ91 alloys was studied in Hank's solution, Dulbecco's Modified Eagle's Medium (DMEM) and serum-containing medium (DMEM adding 10% fetal bovine serum (DMEM+FBS)) over a 7 day immersion period. The biocorrosion of the above three al...
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PMID: 19966381
PDF is available here.
PDF is available here.