Define Magnesium alloy. Magnesium alloy synonyms, Magnesium alloy pronunciation, Magnesium alloy translation, English dictionary definition of Magnesium alloy. n. Symbol Mg A light, silvery-white, moderately hard metallic element that in ribbon or powder form burns with a brilliant white flame. Obtained chiefly...

The present study highlights the noninferiority of the biodegradable polymer BES compared with the durable polymer SES and, although not powered for superiority, demonstrated a trend toward clinical superiority (p = 0.069) (Fig. 2A). In addition, the findings of the study of a significant reduction in the more robust and unequivocal POCE of all-cause death, all MI, or all-cause revascularization, in subjects implanted with biodegradable polymer BES, lends further support to its increased safety compared with the durable polymer SES.. The other most notable finding of the study was the increased safety of the biodegradable polymer BES, compared with the durable polymer SES, secondary to a significant reduction in very late (,1 year) ST and its associated clinical outcomes. A finding that continued out to 5 years, with the curves continuing to separate (Fig. 4). In addition, the incidence of ST associated with the biodegradable polymer BES appeared to have almost plateaued.. Despite the findings ...

Fingerprint Dive into the research topics of Stent thrombosis with bioabsorbable polymer drug-eluting stents: insights from the Food and Drug Administration database. Together they form a unique fingerprint. ...

The introduction of drug-eluting stents (DES) in the treatment of coronary artery disease has led to a significant reduction in morbidity. However, the first generation of these devices had no positive impact on the mortality after PCI (compared to bare metal stents), which was greatly attributed to a somewhat increased incidence of late and very late stent thrombosis. Concerns about the role of durable polymers as a potential trigger of inflammation and finally adverse events also led to the development of DES with biodegradable coatings, which leave after degradation of the coating only a bare metal stent in the vessel wall that does not induce an inflammatory response. While such biodegradable polymer DES are increasingly used in clinical practice, there is no data available from head-to-head comparisons between biodegradable and contemporary third generation durable polymer DES ...

The introduction of drug-eluting stents (DES) in the treatment of coronary artery disease has led to a significant reduction in morbidity. However, the first generation of these devices had no positive impact on the mortality after PCI (compared to bare metal stents), which was greatly attributed to a somewhat increased incidence of late and very late stent thrombosis. Concerns about the role of durable polymers as a potential trigger of inflammation and finally adverse events also led to the development of DES with biodegradable coatings, which leave after degradation of the coating only a bare metal stent in the vessel wall that does not induce an inflammatory response. While such biodegradable polymer DES are increasingly used in clinical practice, there is no data available from head-to-head comparisons between biodegradable and contemporary third generation durable polymer DES ...

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Microstructural simulation of friction stir welding using a …. Microstructure evolution model The microstructural evolution during FSW of AZ91 magnesium alloy is simulated using the coination of CA and LJ methods in Deform-3D software which are coupled to the thermo-mechanically, rigid-viscoplastic FEM model of FSW. Microstructure and interfacial reactions of soldering …. The U.S. Department of Energys Office of Scientific and Technical Information @article{osti_22066166, title = {Microstructure and interfacial reactions of soldering magnesium alloy AZ31B}, author = {Liu , E-mail: [email protected] and Zhonghui, Wu}, abstractNote = {In this paper, economic and innoxious solder alloys with low melting temperature were designed for AZ31B.. Microstructure characterization of LAE442 magnesium …. The magnesium alloy LAE442 was processed by extrusion and equal channel angular pressing (ECAP) to achieve ultrafine grained microstructure. Detailed characterization of the microstructure was ...

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Emergence of Biodegradable Materials to Encourage Global Bone Repair Materials Markets Growth - Press Release by MarketResearchReports.biz

News and information on minimally invasive coronary disease therapies, covering valvular, structural, radial access, chronic total occlusion, and imaging issues.

PubMed Central Canada (PMC Canada) provides free access to a stable and permanent online digital archive of full-text, peer-reviewed health and life sciences research publications. It builds on PubMed Central (PMC), the U.S. National Institutes of Health (NIH) free digital archive of biomedical and life sciences journal literature and is a member of the broader PMC International (PMCI) network of e-repositories.

TY - JOUR. T1 - Structure homogeneity and low-temperature micromecanical properties of ultrafine-grained magnesium alloy AZ31. AU - Estrin, Y. Z.. AU - Fomenko, L. S.. AU - Lubenets, S. V.. AU - Rusakova, A. V.. PY - 2011/6. Y1 - 2011/6. N2 - The degree of microstructure homogeneity for an ultrafine-grained (UFG) AZ31 magnesium alloy obtained by special thermomechanical treatment including four passes of equal-channel angular pressing (ECAP, Route Bc) was studied by the microindentation method. The defect structure of the UFG alloy was found to be reasonably homogeneous. The texture associated with ECAP results in lower values of mi-crohardness measured on the plane normal to the extrusion axis as compared to those on a plane containing the axis, and also in some dependence of microhardness on the location of the indent on the billet surface. The microhardness of the initial coarse grained alloy was close to that of the UFG samples measured on the plane normal to the extrusion axis. The tensile ...

The process progress for magnesium alloy surface treatment technology include conversion coating, anodizing, micro-arc oxidation, electrochemical plating, ion implantation etc was summarized. The development trends for magnesium alloy surface treatment were analyzed.

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The Promus ELITE Stent System builds on the proven outcomes of almost 10,000 patients in 11 clinical trials of permanent polymer coronary stents

A method for the production of a lamellar reflective polymeric body is provided and includes the steps of providing a first stream of a first heat plastified polymeric material and a second stream of a second heat plastified polymeric material, and encapsulating discrete portions of the first polymeric material in the second polymeric material by coextruding the polymeric materials to form a plurality of ribbon-like layers of the first polymeric material within a matrix of the second polymeric material to form the reflective polymeric body. The layers of the first polymeric material are arranged to have their major interfaces aligned substantially parallel to the major surfaces of the body such that at least 30% of light incident on the body is reflected. The ribbon-like layers may be further divided into a series of platelet-like layers to produce layers which are discontinuous in all major planar dimensions by passing the ribbon-like layers through a reciprocating feed plate or valve.

Column 802. five or 10 minutes. It seems absurd that we use the container for those five or 10 minutes but that it will lie in or on the ground for five or 50 years. The third argument relates to disposal. Biodegradable materials are less stable as landfill materials where future buildings may be constructed. That is a short-sighted argument. The fact is that we are desperately short of landfill sites in this country. We cannot go on for ever with that method of disposal. We need to look at alternatives. Primarily, that will be incineration, for which biodegradable materials are well suited. Advances in science now mean that totally biodegradable materials are available, or will soon become available. They are often made of plant material. Paper and cardboard are long established but usually need to be coated with a film to ensure adequate protection of the food. Such a film is usually a plastic, such as polythene, which is not biodegradable. Furthermore, it prevents penetration by water and ...

This first-in-human study was designed to examine the temporal patterns of tissue healing and the proof-of-concept for restoration to a BMS. We chose 4 months post stent deployment as the first assessment point because the polymer coating is completely absorbed at ∼3 months. Repeated imaging at 6, 8, and 18 months allowed a detailed assessment of the tissue strut coverage, strut malapposition, positive remodeling, and other changes that have been associated with some of the durable polymer DES.. Our study confirmed, up to 18 months, the preliminary safety and efficacy of the cobalt chromium thin-strut MiStent SES, from which a poly lactide-co-glycolic acid polymer coating is absorbed in 45 to 60 days. Crystalline sirolimus is delivered locally in sustained, therapeutic concentrations up to 6 months, without initial burst. The small angiographic in-stent LLL at each time point, along with the low neointimal volume obstruction on IVUS, indicates stent efficacy. Of particular interest, and in ...

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Last night news began circulating on Twitter that Abbotts Absorb BVS (Bioresorbable Vascular Scaffold) was being withdrawn from the European market. This information was prompted by several physicians posting on Twitter a March 31 Urgent Field Safety Notice/Physician Advisory letter from Abbott addressed to Valued Abbott Vascular Customer.. A number of news sources, including this one, posted articles and tweets to the effect that the Absorb was being taken off the commercial markets and, as the letter stated, Effective May 31, 2017, the device will only be available in clinical register setting at select sites/institutions that will play a pivotal role in the monitoring of this technology until Summer 2018 at which time the situation will be reviewed.. This morning Abbott reacted to this initial flurry of reports that they had pulled the Absorb with some clarification: specifically that the Absorb is NOT being pulled from the market and still retains the CE Mark. An Abbott spokesperson ...

Why are bioresorbable scaffolds so exciting? Simply because they fulfil the task of scaffolding the artery wall during the healing period, and thereafter vanish. In other words, their lifetime is adjusted to the healing process, thus avoiding any risk of causing a new disease (eg, late thrombosis, in-stent restenosis, or neoatherosclerosis) as can happen with permanent stents. Permanent stents do a perfect scaffolding job, but remain in place when they are no longer necessary, leading to a foreign body reaction with complications.

Indias National Pharmaceutical Pricing Authority is slated to revisit its decision to impose price caps on coronary stents in February of 2018 and it is looking for input from manufacturers, the agency said in a statement last week.. The NPPA capped prices for drug-eluting stents and bioresorbable scaffolds in February this year, while also cutting the prices for all coronary stents by as much as 85%. The move was largely criticized by companies within the medical device industry.. Abbott(NYSE:ABT) announced earlier this month that it wont introduce its next-gen drug-eluting stent, Xience Alpine, in the Indian market due to the price caps. Boston Scientific (NYSE:BSX) is looking pull its Synergy device from the market for the same reason.. In October, AdvaMed filed a petition with the U.S. Trade Representative seeking to suspend Generalized System of Preferences benefits to India over the price cap issue.. The GSP is a preferential trade program used by the U.S. to give duty-free treatment for ...

2000 The American Ceramic Society. Manuscript No. 189354. Received May 7, 1999; approved June 22, 2000. Based in part on the thesis submitted by M. A. Boling-Risser for the Ph.D. degree in materials science and engineering, Northwestern University, Evanston, Illinois, 1998. This research was supported by the U.S. Department of Energy, and by Argonne National Laboratorys Division of Educational Programs, under Contract No. W-31-109-ENG-38. Thanks are extended to Alek Pyzik of Dow Chemical USA, who provided the material for this research and arranged for the postprocessing heat treatments. Thanks to Nestor Zaluzec at Argonne National Laboratory for performing the XEDS experiments, to Craig Sperry for assistance in monitoring the experiments, and to Antonio R. de Arellano-López for his assistance in reviewing the manuscript ...

May 15, 2012. Follow-up Data from EVOLVE Trial Presented at EuroPCR; Trial is Evaluating Next-Generation Everolimus-Eluting Platinum Chromium Coronary Stent with Ultra-Thin Bioabsorbable Abluminal Polymer. Boston Scientific Corporation (NYSE: BSX) announces that the SYNERGY™ Everolimus-Eluting Bioabsorbable Polymer-Coated Platinum Chromium Coronary Stent System demonstrated non-inferior results in treating de novo coronary artery lesions at one year compared to the PROMUS Element™ Everolimus-Eluting Platinum Chromium Stent System in the EVOLVE First Human Use Trial. The trial reported one-year clinical and six-month intravascular ultrasound (IVUS) outcomes data, evaluating the safety and effectiveness of the bioabsorbable abluminal polymer-coated SYNERGY Stent. Results were presented today at the annual EuroPCR Scientific Program in Paris by Stefan Verheye, M.D., Ph.D., F.E.S.C., senior interventional cardiologist at the Antwerp Cardiovascular Institute, ZNA Middelheim Hospital, ...

DIN 54900-2 : German Language - TESTING OF THE COMPOSTABILITY OF POLYMERIC MATERIALS - PART 2: EVALUATION OF THE COMPLETE BIODEGRADABILITY OF POLYMERIC MATERIALS IN LABORATORY TESTS

The present disclosure is directed to using a blend of sorbitan esters as a surfactant to produce a stable water-in-oil high internal phase emulsion in the preparation of a low density porous crosslinked polymeric material. This process produces low density, high capacity, porous, crosslinked, polymeric materials with improved absorption capacity and foam properties.

A moisture-absorbing polymeric material is disclosed which consists of a combination of a thermoplastic material with an absorbing agent. The thermoplastic material is chosen such that when the absorbing agent is added to the thermoplastic material in the molten state and subsequently formed into a product, the absorbing agent tends to migrate towards the surface of the moisture-absorbing polymeric material to form a migration zone, wherein the absorbing agent is more highly concentrated in the surface of the polymer material than towards the interior.

Novel bioabsorbable polymeric blends are disclosed. The blends have a first component that is a polylactide polymer or a copolymer of lactide and glycolide and a second component that is poly(p-dioxanone) polymer. The novel polymeric blends provide medical devices having dimensional stability. Also disclosed are novel bioabsorbable medical devices made from these novel polymer blends, as well as novel methods of manufacture.

Novel bioabsorbable polymeric blends are disclosed. The blends have a first component that is a polylactide polymer or a copolymer of lactide and glycolide and a second component that is poly(p-dioxanone) polymer. The novel polymeric blends provide medical devices having dimensional stability. Also disclosed are novel bioabsorbable medical devices made from these novel polymer blends, as well as novel methods of manufacture.

SINGAPORE, Sept. 26, 2011 /CNW/ -- Novus Scientific Announces the Worlds 1st Long-Term Absorbable Mesh as an Alternative to Non-Absorbable Synthetic Mesh.

A stent is fabricated utilizing a polymer that is selected for its tendency to degrade from the surface inwardly rather than undergo bulk erosion so as to substantially reduce the risk of large particles becoming detached and being swept downstream. Such polymer is hydrophobic yet has water-labile linkages interconnecting the monomers. Ester or imide bonds are incorporated in the polymer to render the surface degrading materials suitable for use in stent applications. The stent may be coated with such polymer or may be wholly formed therefrom.

The hot deformation characteristics of AZ31 magnesium alloy rod extruded at temperatures of 300 °C, 350 °C and 450 °C have been studied in compression. The extruded material had a fiber texture with parallel to the extrusion axis. When extruded at 450 °C, the texture was less intense and the direction moved away from the extrusion axis. The processing maps for the material extruded at 300 °C and 350 °C are qualitatively similar to the material with near-random texture (cast-homogenized) and exhibited three dynamic recrystallization (DRX) domains. In domains #1 and #2, prismatic slip is the dominant process and DRX is controlled by lattice self-diffusion and grain boundary self-diffusion, respectively. In domain #3, pyramidal slip occurs extensively and DRX is controlled by cross-slip on pyramidal slip systems. The material extruded at 450 °C exhibited two domains similar to #1 and #2 above, which moved to higher temperatures, but domain #3 is absent. The results are interpreted in terms of the

Metal-induced artifacts in computed tomography and magnetic resonance imaging: comparison of a biodegradable magnesium alloy versus titanium and stainless steel ...

Metal-induced artifacts in computed tomography and magnetic resonance imaging: Comparison of biodegradable magnesium alloy versus titanium and stainless steel ...

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Based on the frame work of continuum damage mechanics, a research work of anisotropic damage evolution in warm stamping process of magnesium alloy

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TM 1-1500-204-23-6 Table 4-7. Identification of Magnesium Alloys Commercial designation Current DOW1 ASTM2 AMC3 specification Conditions Sheet and Plate FSI AX31A C52S QQ-M-44 O (Fully Annealed) H24 (Strain Hardened Partially Annealed) H26 (Strain Hardened Partially Annealed) AX31B O (Fully Annealed) H24 (Strain Hardened Partially Annealed) Rods, Bars, and Shapes JI AZ61A C57S QQ-M-31 As Extruded FSI AZ31B C52S QQ-M-31 As Extruded M MIA 3S QQ-M-31 As Extruded 01 AZ80A C58S QQ-M-31 As Extruded Tubing FSI AX31 A C52S WW-T-825 JI AZ61A C57S WW-T-825 M MIA 3S WW-T-825 Commercial designation Current DOW ASTM AMC specification Type Temper Castings H A263A 265 QQ-M-56 Sand AC (As Cast) HT (Heat-Treated and Aged) ACS (As Cast and Stabilized) HTS (Heat-Treated and Stabilized) M MIB 403 QQ-M-56 Sand AC C A292A 260 QQ-M-56 Sand AC HT HTA ACS HTS A291 QQ-M-56 Sand AC HT HTA See footnotes at end of table. 4-15 ...

According to Xiaomi, the chassis has an internal magnesium alloy structure encased in three layers of graphite. This gives the Mi 3 a solid feel and a metallic appearance. The sandblast finish further helps to keep the Mi 3 looking clean even after using it for a week; fingerprints and smudges arent obvious and to most, you probably cant spot it. ...

The Vanguard ALTA PH-123V magnesium alloy video head is a fluid video head that includes a spring-loaded counterbalance system and a fine-tuning front to back.

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The Absorb stent is a significant advance in the way that coronary artery disease can be treated, said Philippe L.-LAllier, M.D., director, interventional cardiology, Montreal Heart Institute. Its novel technology means that once the stent has dissolved, the treated artery can pulse and flex as demands on the heart change with everyday activities. It also means physicians can more easily offer their patients other treatment options if necessary in a patients future. With Health Canadas approval of the Absorb bioresorbable stent, Abbott plans to offer the innovative device to Canadian hospitals nationwide starting this summer. Alberta resident, Cynthia Gibeau, 60, was treated with the Absorb bioresorbable heart stent three years ago through a special access program after she was diagnosed with blockages in her coronary arteries. When I was told that I could receive a stent that would disappear once it had done its job, I felt so relieved, said Cynthia. Its been three years since the ...

ACC 2017, 3/30/2017 - Poor Outcomes for Bioresorbable Stents in Small Coronary Arteries WATCH VIDEO: Bioresorbable Stent Comparable to Xience at Two Years, With Concerns Stephen Ellis, M.D., professor of medicine and director of interventional cardiology at Cleveland Clinic, discusses the two year outcomes of the ABSORB III trial of Absorb vs. Xience.…

Abbotts Bioabsorbable Stent Technology Holds Promise asFuture-Genera...ABBOTT PARK Ill. March 24 2007 /PRNewswire-FirstCall/ --Abbott tod... The encouraging results from the first 30 patients of ABSORBsuggest ...The single MACE event reported was a non-Q-wave myocardialinfarction.......,Abbott,Announces,Positive,Six-Month,Results,From,the,Worlds,First,Clinical,Trial,of,a,Fully,Bioabsorbable,Drug-Eluting,Coronary,Stent,medicine,advanced medical technology,medical laboratory technology,medical device technology,latest medical technology,Health

Intraluminal prostheses and methods of impregnating same with pharmacological agents for delivery within a body of a subject are provided. An intraluminal prosthesis comprising polymeric material is immersed in a mixture of carrier fluid and pharmacological agent(s). The mixture of carrier fluid and pharmacological agent is pressurized for a time sufficient to cause the polymeric material of the intraluminal prosthesis to swell such that the carrier fluid and pharmacological agent at least partially penetrate the swollen polymeric material. Pressure is then removed such that the carrier fluid diffuses out of the swollen polymeric material and such that a predetermined amount of the pharmacological agent remains elutably trapped within the polymeric material.

Contemporary reports by Polish authors on the application of mass spectrometric methods for the elucidation of the subtle molecular structure of biodegradable polymers and their degradation products will be presented. Special emphasis will be given to natural aliphatic (co)polyesters (PHA) and their synthetic analogues, formed through anionic ring-opening polymerization (ROP) of b-substituted b-lactones. Moreover, the application of MS techniques for the evaluation of the structure of biodegradable polymers obtained in ionic and coordination polymerization of cyclic ethers and esters as well as products of step-growth polymerization, in which bifunctional or multifunctional monomers react to form oligomers and eventually long chain polymers, will be discussed. Furthermore, the application of modern MS techniques for the assessment of polymer degradation products, frequently bearing characteristic end groups that can be revealed and differentiated by MS, will be discussed within the context of ...

Background: Bioabsorbable interference screw fixation has superior biomechanical properties compared to suture anchor fixation for biceps tenodesis. However, it is unknown whether fixation technique influences clinical results. Hypothesis: We hypothesize that subpectoral interference screw fixation offers relevant clinical advantages over suture anchor fixation for biceps tenodesis. Study Design: Case Series. Methods: We performed a retrospective review of a consecutive series of 88 patients receiving open subpectoral biceps tenodesis with either interference screw fixation (34 patients) or suture anchor fixation (54 patients). Average follow up was 13 months. Outcomes included Visual Analogue Pain Scale (0-10), ASES score, modified Constant score, pain at the tenodesis site, failure of fixation, cosmesis, deformity (popeye) and complications. Results: There were no failures of fixation in this study. All patients showed significant improvement between their preoperative and postoperative status ...

TY - JOUR. T1 - Effect of travel speed on quality and welding efficiency of friction stir welded AZ31B magnesium alloy. AU - Baghdadi, Amir Hossein. AU - Selamat, Nor Fazilah Mohamad. AU - Sajuri, Zainuddin. AU - Kokabi, Amir Hossein. PY - 2018/1/1. Y1 - 2018/1/1. N2 - Weight reduction is one of the most concerning issues of automotive and aircraft industries in reducing fuel consumption. Magnesium (Mg) alloys are the lightest alloys which can be used in the structure due to low density and high strength to weight ratio. Developing a reliable joining process of magnesium alloys is required due to limited ductility and low workability at room temperature. Friction stir welding (FSW) is a solid-state welding process that can be performed to produce sound joints in magnesium alloys. Researchers have performed investigations on the effect of rotation and travel speeds in FSW of AZ31B magnesium alloy. However, there is lack of study on the FSW parameters, i.e. travel speed below 50 mm/min and ...

Biodegradable implants have been steadily gaining popularity, offering safer, more efficient alternatives to common therapeutics. Currently, most ocular implants that are used for sustainable drug delivery are non-biodegradable. In addition to the eye being a sensitive area, the likelihood of complications increases when multiple surgeries are performed to remove the implant as well as insert it. Biodegradability of the implant can eliminate these removal complications. Using COMSOL® Multiphysics, we modeled the delivery of betamethasone phosphate (BP) from a biodegradable implant that is placed in the scleral layer of a human eye. As a glucocorticoid, BP is used to reduce inflammation in the tissue layers surrounding the sclera. We used a 2D axisymmetric geometry to represent the eye with the implant and focused on the delivery of BP to the retina. The implants bulk erosion and mass transfer dynamics resulted in an initial spike of BP release followed by a slow, gradual depletion of the ...

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DOI: 10.11607/prd.00.0342 The aim of the present study was to evaluate clinically and histologically the treatment of intrabony periodontal defects with a bioresorbable membrane barrier. Fifty-two intrabony periodontal defects were treated according to the principles of guided tissue regeneration (GTR) with a bioresorbable membrane. Results were evaluated by assessing probing pocket depth, recession of the gingival margin, and clinical attachment level at baseline and at 1 and 2 years after therapy. Bone level changes were evaluated radiographically. The postoperative phase was uneventful in all cases. There was a mean probing pocket depth reduction from 8.4 to 3.6 mm, a mean increase of gingival margin recession from 1.5 to 3.0 mm, and a mean clinical attachment level change from 9.9 to 6.5 mm. Mean attachment gain was 3.4 mm. Two teeth scheduled for extraction were also treated with the same bioresorbable membrane. The histologic analysis 6 months after treatment revealed the formation of new ...

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Dr. Fady Genedy is a member of a US-Egyptian team who developed an enhancement to occlusive collagen membranes in an effort to improve guided tissue regeneration. The team included Professors Vincent Iacono and Ahmed Gamal. Dr. Genedy spoke with me from Cairo, Egypt, about how the project came about and presented a brief clinical case of how the perforated membrane works. Chiraz Guessaier, CDA Oasis Manager. ...

There was an increased risk of stent thrombosis with first-generation DES that led to the development of DES with biocompatible polymers and more recently biodegradable polymers and bioabsorbable vascular scaffolds. We have shown compelling data for safety and efficacy of second-generation DES with biocompatible polymers in a large spectrum of patients including those at high risk for stent thrombosis (3). The newer DES with bioabsorbable/biodegradable polymers and stents that allow for complete dissolution of polymer or bioscaffold leaving either a residual metal platform or native vessel would, in theory, reduce the rates of stent thrombosis. Biodegradable polymer biolimus-eluting stents were perceived to be safer than first-generation sirolimus-eluting stents on the basis of the results of individual trials that were powered for only composite endpoints of safety and efficacy. However, in the largest mixed comparison meta-analysis of ,61 trials involving 63,242 patients, there was a ...

Detailed description of guided tissue regeneration and barrier membranes used including resorbable and non-resorbable membranes such as collagen membrane, PTFE membranes, PGA membranes etc.

Hydroxyapatite (HAp) is biomaterial widely used in the regeneration of bone tissue. Addition of osteogenic cells to HAp implants may accelerate the bone repair process. The aim of this study was to investigate how the bone marrow cells (BMCs) loading of porous hydroxyapatite/poly-L-lactide (HAp/PLLA) act to ectopic osteogenesis. In this purpose HAp/PLLA with and without BMCs was subcutaneously implanted into BALB/c mice. As a control served implants from both types which werent implanted. Three weeks after implantation, histological analysis of implants was done. It was observed significant resorption and induction of collagenogenesis in implanted biomaterials. The structure of new bone was seen in implants loaded with bone marrow cells ...

A reservoir-electrode for an iontophoretic delivery device of the present invention includes an electrode; and a hydrophilic reservoir situated in electrically conductive relation to the electrode. The reservoir is formed from a bibulous hydrophilic cross-linked polymeric material having a substantially uniform concentration of an alkali metal chloride salt therein thereby substantially eliminating concentration gradients of the salt with respect to the electrode. The polymeric material has a first surface and a second surface that is adhesively adherent to the electrode. The first surface of the polymeric material is releasably adhesive to an applied area of a patients skin. The polymeric material has a cohesive strength, wherein a bond strength of an adhesive bond between the second surface of the polymeric material to the electrode is greater than the cohesive strength of the polymeric material and an adhesive bond strength of the first surface of the polymeric material to the applied area of the

0005] Generally, a polymeric material is injection molded onto a semi-finished article made from a material other than the polymeric material (e.g., carbon fiber prepreg) so as to form a molded product, such as a screwdriver, safety scissors, and a portable electrical device. However, the connection between the polymeric material and the semi-finished article is weak, thereby resulting in separation of the polymeric material from the semi-finished article. To improve the connection therebetween, a surface of the semi-finished article to be in contact with the polymeric material is treated by abrading, sandblasting, etching and other methods to improve the roughness of the semi-finished article, thereby increasing the contact area between the semi-finished article and the polymeric material. Since the connection between the semi-finished article and the polymeric material relies upon a physical bonding, the connection therebetween is still insufficient ...

REVA Medical, Inc. announced that it has received CE Mark approval for its Fantom drug-eluting bioresorbable coronary scaffold, which offers multiple and substantial performance advantages over first-generation scaffolds on the market.. Fantom is REVAs first commercial product. CE Marking allows for commercial sales in Europe and other countries that recognize the mark. With the approval, REVA will commence selling in selected centers in Europe this quarter. Initial quantities of the product have been manufactured and are immediately available to support commercialization.. Commenting on the approval, Chief Executive Officer Ms. Reggie Groves said, CE Mark approval for Fantom is a major milestone for the Company. It is the culmination of years of effort. As the patient population becomes increasingly acquainted with the appeal of bioresorbable scaffolds in general, versus metal stents, we believe they will come to ask for Fantom by name, based on our positive data and the increasing preference ...

The creep mechanism of magnesium alloy at high temperature and the design methods of heat-resistant magnesium alloy system are introduced.The present research statue of heat-resistant magnesium alloy improved by the addition of rare earth(RE),alkaline(Ca,Sr)and other elements(Si、Bi、Sn) is reviewed.It is pointed out that the future direction of research and development of heat resistant magnesium alloy is to develop magnesium alloy with low cost,good castability and good comprehensive mechanical properties.

ABSTRACT. Background: Bioabsorbable vascular scaffolds (BVS) are a relatively new technology in interventional cardiology and it has many upsides when comparing it to metallic stents. After performing its main function - revascularization, it also repairs the wall of the artery and then absorbs and disappears completely. Basically it overcomes all of the downsides which metallic stents have. This study was done to evaluate results and complications of two-year treatment and also the need of revascularization for patients that have been treated with BVS. Methods: This follow up is done performing a retrospective survey. There were 46 consecutive patients who have suffered from ischemic heart disease in our survey (this includes stable and unstable chest angina and myocardial infarction). First of all, risk factors of our patients were collected (diabetes, hypertension, smoking). Coronary artery angiography and stenting with bioabsorbable stents were performed on all of these patients. Patients ...

The results obtained in the present study with murine immune cell subpopulations support the biocompatibility of the MGHA material and suggest an adequate host tissue response to their scaffolds upon their implantation. The interaction of new nanocomposite mesoporous glass/hydroxyapatite (MGHA) scaffolds with immune cells involved in both innate and acquired immunity has been studied in vitro as an essential aspect of their biocompatibility assessment. Since the immune response can be affected by the degradation products of bioresorbable scaffolds and scaffold surface changes, both processes have been evaluated. No alterations in proliferation and viability of RAW-264.7 macrophage-like cells were detected after culture on MGHA scaffolds which did not induce cell apoptosis. However, a slight cell size decrease and an intracellular calcium content increase were observed after contact of this cell line with MGHA scaffolds or their extracts. Although no changes in the percentages of RAW cells with low and

The treatment of femoropopliteal lesions has known an important evolution in the last years. An important limitation of current endovascular therapy remains the occurrence of restenosis. In order to minimize restenosis rates, drug eluting technologies are evolving. The use of drug-eluting stents (DES) in coronary arteries shows beneficial results, leading to investigation of DES in femoropopliteal arteries. In this article, we give an overview of current available data on treatment with drug eluting technologies in the superficial femoral artery (SFA). This paper su mmarizes also the current available data of the use of drug-coated balloons (DCB) in the femoropopliteal tract. Currently, no data are available on the use of DCB in long lesions. A drug eluting bioresorbable scaffold seems to be very promising in coronary arteries. The transfer to the peripheral area is nowadays ongoing. Which technique and device for which lesion and patient requires further investigation to build up a real ...

United States Patent 3,380,848 METHOD OF PRQDUCING SOLID POLY- MERlC MATERIAL HAVING BACTERI- CllDAL PROPERTIES Carl Horowitz, Brooklyn, N.Y., assignor to Polymer Research Corporation of America, Brooklyn, N.Y., a corporation of New York No Drawing. Filed May 27, 1964, Ser. No. 370,725 7 Claims. (Cl. 117-113) ABSTRACT OF THE DISCLOSURE This invention relates to the production of polymeric materials having bactericidal properties, including materials such as natural or synthetic polymers, e.g. cellulose, cotton, paper, leather, rubber, nylon, polyesters, polypropylene, etc. This is accomplished according to the invention by contacting the solid polymeric material with the reaction mixture formed by reacting an alkali metal hydroxide with an aqueous solution of silver nitrate. Under the influence of the reactants the substrate turns a brown color due to colloidally dispersed, bactericidally active silver oxide formed in situ. The bactericidal activ ity is permanent and the silver oxide lodged in ...

Four main classes of biodegradable polymers are analyzed in this report, polylactic acid (PLA), starch-based polymers, synthetic biodegradable polymers, such as aromatic aliphatic co-polyesters, and polyhydroxyalkanoates (PHA). The report analyses their key performance properties, applications development, market drivers and future prospects. Each product section also contains an estimate of market size by world region and end use market, plus forecasts to 2010. There is also an analysis of key suppliers and their products.

Find out if guided tissue regeneration can help you regrow lost jaw bone structure by calling our dentists office in Frisco, TX, today at (972) 335-7100.

Researchers at The University of Texas at Arlington have developed a highly elastic biodegradable hydrogel for bio-printing of materials that mimic natural human soft tissues. Bio-printing uses live cells within the scaffolding ...

296001346 - EP 1015670 A1 2000-07-05 - COLOURING MAGNESIUM OR MAGNESIUM ALLOY ARTICLES - [origin: WO9842892A1] This invention provides a method for the anodisation of magnesium or magnesium based alloys using an electrolytic solution (preferably derived primarily from phosphoric acid) containing ammonia, amines or both. The use of such an aqueous electrolytic solution (irrespective of other additions) in at least preferred forms alters the conditions under which anodisation can occur to provide a more than satisfactory coating on the magnesium material with reduced cycle times.[origin: WO9842892A1] This invention provides a method for the anodisation of magnesium or magnesium based alloys using an electrolytic solution (preferably derived primarily from phosphoric acid) containing ammonia, amines or both. The use of such an aqueous electrolytic solution (irrespective of other additions) in at least preferred forms alters the conditions under which anodisation can occur to provide a more than

Increased requirements for crash energy management in automotive interiors have led to increased application of magnesium alloy AM50A. Successful integration of this new alloy with hot chamber diecasting process technology requires substantial adjustment and attention to processes and practices. This paper details the conversion of magnesium AZ91D steering column diecastings to high ductility structural alloy. Description is given of the changes made to foundry practices, casting parameters, process compliance monitoring, and hot end component management. The resulting improvements allow production of components comparable to the traditional alloy in manufacturing process demands while offering improved ductility and impact strength ...

Welding of dissimilar magnesium alloys and aluminum alloys is an important issue because of their increasing appliions in industries. In this document, the research and progress of a variety of welding techniques for joining dissimilar Mg alloys and Al alloys are reviewed from different perspectives. Welding of dissimilar Mg and Al is challenging due to the formation of brittle ...

tional 47: 66-69 (2012) [7] H. K., Lee, H. S., Han, K. J., Son, and S. B. Hong., Optimization of Nd-YAG laser welding parameters for sealing small titanium tube ends. J. of Materials Science and Engineering, Vol. A415, pp.149-155 (2006) [8] L. K., Pan, C. C., Wang, Y. C., Hsiso and K. C., Ho, Optimization of Nd-YAG laser wel-ding onto magnesium alloy via Taguchi analysis. J. of Optics & Laser Technology, Vol. 37, pp. 33-42 (2004) [9] Ibrahim, I. Z., et al., The effect of Gas Metal Arc Welding (GMAW) processes on different welding parameters. Procedia Engineering 41. ...

Light Weight Metal Corrosion and Modeling: Thin, Nanoparticulate Coatings for the Improvement of the Corrosion and Passivation Behavior of AZ Magnesium Alloys

Thesis, English, Environmentally friendly nano structure and nano composite electroless nickel plating on magnesium alloys for Maamoun Abdelhamid Maamoun Mohamed

NEW YORK, Sept. 23, 2010 (GLOBE NEWSWIRE) -- Advanced Battery Technologies, Inc. (Nasdaq:ABAT), a leading developer, manufacturer and distributor of rechargeable Polymer Lithium-Ion (PLI) batteries as well as a manufacturer of electric vehicles, today announced that it received an order to sell aluminum magnesium alloy electric scooters valued at $0.35 million to Italy-based Menzaghi Motors. The company expects to ship these electric scooters in the fourth quarter 2010.

The hot deformation simulation of a ZK60 magnesium alloy at different temperatures from 373 to 673 K and different strain rates of 0.1, 0.01 and 0.002 s−1was studied by using the Gleebe-1500...

This specification covers a magnesium alloy in the form of permanent mold castings. These castings have been used typically for parts operating up to 300 degrees F (149 degrees C), but usage is not limited to such applications.

This specification covers a magnesium alloy in the form of sand castings.,p,These products have been used typically for parts operating in service up to 300 degrees F (149 degrees C) but usage is not limited to such applications.. ...

Global Magnesium Alloys Market 2020-2024, Trends and Forecast Report Size and Share Published in 2020-05-19 Available for US$ 2850 at Researchmoz.us

Ozurdex is a biodegradable implant of the steroid drug dexamethasone designed to allow a slow extended release of the medication. The delivery mechanism is through Allergans NOVADUR™ solid polymer delivery system. is delivered by an intravitreal eye injection which carries the risks associated with any injection into the eye. (Warnings and Precautions from Allergans information-Intravitreal injections have been associated with endophthalmitis, eye inflammation, increased intraocular pressure, and retinal detachments. Use of corticosteroids may produce posterior subcapsular cataracts, increased intraocular pressure, glaucoma, and may enhance the establishment of secondary ocular infections due to bacteria, fungi, or viruses. Corticosteroids should be used cautiously in patients with a history of ocular herpes simplex. Corticosteroids should not be used in active ocular herpes simplex.). ...

Subsidiary is moving towards productisation of its orthopedic bone void fillers Wound Management Technologies (WNDM) has reported that its Resorbable Orthopedics operating subsidiary is moving toward productisation of its patented orthopedic bone void fillers.. The company currently anticipates products to be introduced in Q3 2010, to the bio-products market. The companys strategic intent is to target this estimated multi-billion dollar international market.. Barry Constantine, founder of Resorbable Orthopedics, said: Resorbable Orthopedics has patented technologies that include a resorbable bone wax and a delivery system for orthopedic bone void fillers that were previously unheard of. Orthopedic disorders are expanding internationally into a multi-billion dollar market. These new era biotechnology products are well timed solutions in a healthcare environment where there is a great need for safer and affordable solutions to manage bone wound healing and thereby offer a better quality of life ...

[221 Pages Report] Lactic Acid Market report categorizes the global market by Application (Biodegradable Polymer, Food & Beverage) & Polylactic Acid Market by Application (Packaging, Agriculture), & by Geography

99strategy cluster revealed a replacement business analysis that focuses on Coronary Stents market and delivers in-depth marketing research and future prospects of us Coronary Stents market. The study covers important knowledge that makes the analysis document a handy resource for managers, analysts, business consultants and different key individuals get ready-to-access and self-analyzed study in conjunction with graphs and tables to assist perceive market trends, drivers and market challenges. The study is divided by Application/ finish users Treatment of Angina, Treatment of Myocardial Infarction, Treatment of Other Disease,, merchandise kind Bare-metal Stent (BMS), Drug-eluting Stent (DES), Bioresorbable Vascular Scaffold (BVS), and numerous vital geographies just like the North America, Europe, China, Japan, Southeast Asia, India, The South & The geographical area.. Get Access to SAMPLE pages @ www.99strategy.biz/global-and-asia-coronary-stents-market-2017-2023.html#request-sample. The ...

Bioresorbable silicon electronics technology offers unprecedented opportunities to deploy advanced implantable monitoring systems that eliminate risks, cost and discomfort associated with surgical extraction. Applications include postoperative monitoring and transient physiologic recording after percutaneous or minimally invasive placement of vascular, cardiac, orthopaedic, neural or other devices. We present an embodiment of these materials in both passive and actively addressed arrays of bioresorbable silicon electrodes with multiplexing capabilities, which record in vivo electrophysiological signals from the cortical surface and the subgaleal space. The devices detect normal physiologic and epileptiform activity, both in acute and chronic recordings. Comparative studies show sensor performance comparable to standard clinical systems and reduced tissue reactivity relative to conventional clinical electrocorticography (ECoG) electrodes. This technology offers general applicability in neural ...

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Article Biological denitrification of drinking water using biodegradable polymer. The application of Biodegradable Polymer (BDPs), which can serve as biofilm carrier and simultaneously as water insoluble carbon source for heterotrophic denitrificatio...