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titanium corrosion

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https://www.readbyqxmd.com/read/28415518/antimicrobial-property-cytocompatibility-and-corrosion-resistance-of-zn-doped-zro2-tio2-coatings-on-ti6al4v-implants
#1
Ruoyun Wang, Xiaojing He, Yuee Gao, Xiangyu Zhang, Xiaohong Yao, Bin Tang
Zn-doped ZrO2/TiO2 porous coatings (Zn-ZrO2/TiO2) were prepared on the surface of titanium alloy (Ti6Al4V) by a hybrid approach of magnetron sputtering and micro-arc oxidation (MAO). The microstructures, phase constituents and elemental states of the coating were investigated by scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results demonstrate that the Zn-ZrO2/TiO2 coatings are porous and its thickness is approximately 13μm...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28392135/ten-year-cross-sectional-study-of-mechanically-assisted-crevice-corrosion-in-1352-consecutive-patients-with-metal-on-polyethylene-total-hip-arthroplasty
#2
Daniel K Hussey, Brian J McGrory
BACKGROUND: Mechanically assisted crevice corrosion (MACC) in metal-on-polyethylene total hip arthroplasty (THA) is of concern, but its prevalence, etiology, and natural history are incompletely understood. METHODS: From January 2003 to December 2012, 1352 consecutive THA surgeries using a titanium stem, cobalt-chromium alloy femoral head, and highly cross-linked polyethylene liner from a single manufacturer were performed. Patients were followed at 1-year and 5-year intervals for surveillance, but also seen earlier if they had symptoms...
March 18, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28384526/biomineralisation-with-saos-2-bone-cells-on-tisin-sputtered-ti-alloys
#3
Anusha Thampi V V, Avi Bendavid, P J Martin, Vijay Vaithilingam, Penelope A Bean, Margaret D M Evans, B Subramanian
Surface modifications of metallic implants are important in order to protect the underlying metals from the harsh corrosive environment inside the human body and to minimize the losses caused by wear. Recently, researches are carried out in developing bioactive surfaces on metallic implants, which supports the growth and proliferation of cells on to these surfaces. Titanium silicon nitride (TiSiN) hard nanocomposites thin films were fabricated on Ti alloys (Ti-6Al-4V) by pulsed direct current (DC) reactive magnetron sputtering...
March 18, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28374679/in-vitro-study-of-electrodeposited-fluoridated-hydroxyapatite-coating-on-g-ii-titanium-with-a-nanostructured-tio2-interlayer
#4
Jin-Shyong Lin, Tzung-Bau Tsai, Wen-Ching Say, Chun Chiu, Shih-Hsun Chen
Titanium and its alloys have been widely used as orthopedic and dental implants for several decades due to their superior mechanical properties, corrosion resistance and biocompatibility. Recently, many researches revealed that the hydroxyapatite coatings on biomedical materials can further improve their biocompatibility and bioactivity. However, hydroxyapatite coatings are easily decomposed, weakening the bonding between implants and bone tissues and resulting in a high dissolution rate in the biological environment...
April 4, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28364905/memotain-a-cad-cam-nickel-titanium-lingual-retainer
#5
Neal D Kravitz, Dan Grauer, Pascal Schumacher, Yong-Min Jo
Approximately 1/2 of maxillary and 1/5 of mandibular multi-stranded lingual retainers fail during retention in some form, either bond failure or wire breakage. Memotain is a new CAD/CAM fabricated lingual retainer wire made of custom-cut nickel-titanium, as an alternative to multi-stranded lingual retainers. It offers numerous perceived advantages to the traditional multi-stranded stainless steel wire, including precision fit, avoidance of interferences, corrosion resistance and even the potential for minor tooth movement as an active lingual retainer...
April 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28349700/fast-corroding-thin-magnesium-coating-displays-antibacterial-effects-and-low-cytotoxicity
#6
Sarah Zaatreh, David Haffner, Madlen Strauß, Katharina Wegner, Mareike Warkentin, Claudia Lurtz, Christiane Zamponi, Wolfram Mittelmeier, Bernd Kreikemeyer, Regine Willumeit-Römer, Eckhard Quandt, Rainer Bader
Bacterial colonisation and biofilm formation are characteristics of implant-associated infections. In search of candidates for improved prosthetic materials, fast corroding Mg-based coatings on titanium surfaces were examined for their cytotoxic and antimicrobial properties. Human osteoblasts and Staphylococcus epidermidis were each cultured on cylindrical Ti samples coated with a thin layer of Mg/Mg45Zn5Ca, applied via magnetron sputtering. Uncoated titanium samples served as controls. S. epidermidis was quantified by counting colony forming units...
March 28, 2017: Biofouling
https://www.readbyqxmd.com/read/28342752/chitosan-doped-hybrid-tio2-nanocomposite-based-sol-gel-coating-for-the-corrosion-resistance-of-aluminum-metal-in-3-5-nacl-medium
#7
Balaji J, Sethuraman M G
The study outlines the role of chitosan, a biopolymer on corrosion behavior of Hy/nano-TiO2 based sol-gel coating over aluminum metal. In this study organic-inorganic hybrid sols were synthesized through hydrolysis and condensation of 3-glycidoxypropyltrimethoxy silane (GPTMS), tetraethoxysilane (TEOS) and titanium (IV) isopropoxide (TIP) in acidic solution. Chitosan was doped into sol-gel matrix and self-assembled over aluminum substrate. The resultant chitosan-doped-Hy/nano-TiO2 sol-gel coating was characterized by Fourier Transform Infrared (FT-IR) spectra, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM) and Energy-Dispersive X-ray Spectroscopy (EDX) analyses...
March 22, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28337912/nanostructured-nickel-cobalt-titanium-alloy-grown-on-titanium-substrate-as-efficient-electrocatalyst-for-alkaline-water-electrolysis
#8
Pandian Ganesan, Arumugam Sivanantham, Sangaraju Shanmugam
One of the important challenges in alkaline water electrolysis is to utilize a bifunctional catalyst for both hydrogen evolution (HER) and oxygen evolution (OER) reactions to increase the efficiency of water splitting devices for the long durable operations. Herein, nickel-cobalt-titanium (NCT) alloy is directly grown on a high corrosion resistance titanium foil by a simple, single, and rapid electrochemical deposition at room temperature. The electrocatalytic activity of NCT alloy electrodes is evaluated for both HER and OER in aqueous electrolyte...
March 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28315814/a-closer-look-at-the-in-vitro-electrochemical-characterisation-of-titanium-alloys-for-biomedical-applications-using-in-situ-methods
#9
J-L Wang, R L Liu, T Majumdar, S A Mantri, V A Ravi, R Banerjee, N Birbilis
Titanium (Ti) and its alloys are widely used in several biomedical applications, particularly as permanent orthopaedic implants. Electrochemical testing provides a means to perform accelerated corrosion testing, however whilst results from polarisation testing for Ti and its alloys to date have been generally useful, they are also rather limited on the basis of several reasons. One reason is that the polarisation curves for Ti and its alloys in simulated body fluids all appear rather similar, and they do not present a classical 'breakdown' or pitting potential, making discrimination between alloys difficult...
March 16, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28297095/adverse-reactions-to-orthodontic-materials
#10
I Sifakakis, T Eliades
Adverse effects can arise from the clinical use of orthodontic materials, due to the release of constituent substances (ions from alloys and monomers, degradation by-products, and additives from polymers). Moreover, intraoral aging affects the biologic properties of materials. The aim of this review is to present the currently identified major adverse effects of the metallic and polymeric components found in orthodontic appliances and materials. Corrosion in metallic orthodontic attachments releases metal ions, mainly iron, chromium, and nickel...
March 2017: Australian Dental Journal
https://www.readbyqxmd.com/read/28294119/low-cost-and-durable-bipolar-plates-for-proton-exchange-membrane-electrolyzers
#11
P Lettenmeier, R Wang, R Abouatallah, B Saruhan, O Freitag, P Gazdzicki, T Morawietz, R Hiesgen, A S Gago, K A Friedrich
Cost reduction and high efficiency are the mayor challenges for sustainable H2 production via proton exchange membrane (PEM) electrolysis. Titanium-based components such as bipolar plates (BPP) have the largest contribution to the capital cost. This work proposes the use of stainless steel BPPs coated with Nb and Ti by magnetron sputtering physical vapor deposition (PVD) and vacuum plasma spraying (VPS), respectively. The physical properties of the coatings are thoroughly characterized by scanning electron, atomic force microscopies (SEM, AFM); and X-ray diffraction, photoelectron spectroscopies (XRD, XPS)...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28282634/in-situ-preparation-of-scholzite-conversion-coatings-on-titanium-and-ti-6al-4v-for-biomedical-applications
#12
Bing Liu, Xiao-Ming Shi, Gui-Yong Xiao, Yu-Peng Lu
A scholzite (CaZn2(PO4)2·2H2O) coating was prepared in situ on commercially pure titanium (cpTi) and Ti-6Al-4V (Ti64) substrates using the chemical conversion technology, and its phase composition and microstructure, as well as mechanical, chemical and biological properties were investigated to explore potential applications as a bioactive coating on bone implants. It is indicated that the coating consists mainly of monoclinic scholzite crystals with nano-thick laminar morphology. The crystals on cpTi aggregate to flower-like particles with the diameter of 5-10μm, while form a network structure homogeneously on Ti64...
May 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28276196/preparation-and-characterization-of-alloys-of-the-ti-15mo-nb-system-for-biomedical-applications
#13
J R S Martins Júnior, A A Matos, R C Oliveira, M A R Buzalaf, I Costa, L A Rocha, C R Grandini
In the development of new metallic biomaterials, the Ti-15Mo alloy has great prominence because of its excellent corrosion resistance and good combination of mechanical properties. In this study, the element niobium was added to the Ti-15Mo alloy, forming the Ti-15Mo-Nb system for the purpose of improving their properties and promoting its application as a biomaterial. These alloys are very promising to use as biomedical implants, because they integrate a new class of titanium alloys without the presence of aluminum and vanadium, which may cause cytotoxic effects...
March 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28276193/assessment-of-corrosion-in-retrieved-spine-implants
#14
V C Panagiotopoulou, H S Hothi, H A Anwar, S Molloy, H Noordeen, K Rezajooi, J Sutcliffe, J A Skinner, A J Hart
Recently the use of dissimilar metals in spine instrumentation has increased, especially in the case of adult deformities, where rods made from Cobalt Chrome alloys (CoCr) are used with Titanium (Ti) screws. The use of dissimilar metals increases the risk of galvanic corrosion and patients have required revision spine surgery due to severe metallosis that may have been caused by corrosion. We aimed to assess the presence of corrosion in spine implant retrievals from constructs with two types of material combinations: similar (Ti/Ti) and dissimilar (CoCr/Ti)...
March 9, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28274193/a-peptide-based-biological-coating-for-enhanced-corrosion-resistance-of-titanium-alloy-biomaterials-in-chloride-containing-fluids
#15
Noah Muruve, Yuanchao Feng, Jaye Platnich, Daniel Hassett, Randall Irvin, Daniel Muruve, Frank Cheng
Titanium alloys are common materials in the manufacturing of dental and orthopedic implants. Although these materials exhibit excellent biocompatibility, corrosion in response to biological fluids can impact prosthesis performance and longevity. In this work, a PEGylated metal binding peptide (D-K122-4-PEG), derived from bacteria Pseudomonas aeruginosa, was applied on a titanium (Ti) alloy, and the corrosion resistance of the coated alloy specimen was investigated in simulated chloride-containing physiological fluids by electrochemical impedance spectroscopy and micro-electrochemical measurements, surface characterization, and biocompatibility testing...
March 2017: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/28262451/retrieval-analysis-of-neck-stem-coupling-in-modular-hip-prostheses
#16
Sherwin L Su, Chelsea N Koch, Thu M Nguyen, Jayme C Burket, Timothy M Wright, Geoffrey H Westrich
BACKGROUND: Dual-taper modular stems have suffered from high revision rates caused by adverse local tissue reactions secondary to fretting and corrosion. We compared the fretting and corrosion behavior of a group of modular neck designs to that of a design that had been recalled for risks associated with fretting and corrosion at the modular neck junction. METHODS: We previously analyzed fretting and corrosion on 60 retrieved Rejuvenate modular neck-stem implants...
February 14, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28258269/ion-release-and-galvanic-corrosion-of-different-orthodontic-brackets-and-wires-in-artificial-saliva
#17
Soodeh Tahmasbi, Tahereh Sheikh, Yasamin B Hemmati
INTRODUCTION: To investigate the galvanic corrosion of brackets manufactured by four different companies coupled with stainless steel (SS) or nickel-titanium (NiTi) wires in an artificial saliva solution. MATERIALS AND METHODS: A total of 24 mandibular central incisor Roth brackets of four different manufacturers (American Orthodontics, Dentaurum, Shinye, ORJ) were used in this experimental study. These brackets were immersed in artificial saliva along with SS or NiTi orthodontic wires (0...
March 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28254324/modification-of-ti6al4v-implant-surfaces-by-biocompatible-tio2-pcl-hybrid-layers-prepared-via-sol-gel-dip-coating-structural-characterization-mechanical-and-corrosion-behavior
#18
Michelina Catauro, Flavia Bollino, Roberto Giovanardi, Paolo Veronesi
Surface modification of metallic implants is a promising strategy to improve tissue tolerance, osseointegration and corrosion resistance of them. In the present work, bioactive and biocompatible organic-inorganic hybrid coatings were prepared using a sol-gel dip coating route. They consist of an inorganic TiO2 matrix in which different percentages of poly(ε-caprolactone) (PCL), a biodegradable and biocompatible polymer, were incorporated. The coatings were used to modify the surface of Ti6Al4V substrates in order to improve their wear and corrosion resistance...
May 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28247484/the-involvement-of-coordinative-interactions-in-the-binding-of-dihydrolipoamide-dehydrogenase-to-titanium-dioxide-localization-of-a-putative-binding-site
#19
Avraham Dayan, Gilad Babin, Assaf Ganoth, Nivin Samir Kayouf, Neta Nitoker Eliaz, Srijana Mukkala, Yossi Tsfadia, Gideon Fleminger
Titanium (Ti) and its alloys are widely used in orthodontic and orthopedic implants by virtue to their high biocompatibility, mechanical strength, and high resistance to corrosion. Biointegration of the implants with the tissue requires strong interactions, which involve biological molecules, proteins in particular, with metal oxide surfaces. An exocellular high-affinity titanium dioxide (TiO2 )-binding protein (TiBP), purified from Rhodococcus ruber, has been previously studied in our lab. This protein was shown to be homologous with the orthologous cytoplasmic rhodococcal dihydrolipoamide dehydrogenase (rhDLDH)...
February 28, 2017: Journal of Molecular Recognition: JMR
https://www.readbyqxmd.com/read/28216843/in-vitro-evaluation-of-cytotoxicity-and-corrosion-behavior-of-commercially-pure-titanium-and-ti-6al-4v-alloy-for-dental-implants
#20
Sanchitha Chandar, Ravindra Kotian, Prashanthi Madhyastha, Shama Prasada Kabekkodu, Padmalatha Rao
PURPOSE: The aim of this study was to investigate the cytotoxicity in human gingival fibroblast by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and corrosion behavior by potentiodynamic polarization technique of commercially pure titanium (Ti 12) and its alloy Ti-6Al-4V (Ti 31). MATERIALS AND METHODS: In the present in vitro study, cytotoxicity of Ti 12 and Ti 31 in human gingival fibroblast by MTT assay and the corrosion behavior by potentiodynamic polarization technique in aqueous solutions of 0...
January 2017: Journal of Indian Prosthodontic Society
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