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titanium corrosion

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https://www.readbyqxmd.com/read/29156353/in-situ-formation-of-textured-tin-coatings-on-biomedical-titanium-alloy-by-laser-irradiation
#1
Xueyang Zhao, Peng Zhang, Xiaojian Wang, Yun Chen, Hui Liu, Lianxi Chen, Yinying Sheng, Wei Li
The Ti-35Nb-7Zr-5Ta (TNZT) alloy has received much research attention among the biomedical titanium alloys for its low Young's modulus and outstanding biocompatibility. This paper provided an innovative technique for improving the wear and corrosion resistance of the TNZT alloy, by developing in-situ formed TiN coatings on the surface of the TNZT alloy through laser irradiation. The new technique combines the advantages of laser surface texturing and laser gas alloying. The experimental results showed that the phase compositions of the textured TNZT samples were β-Ti, martensitic α'' phase and TiN after laser texturing in N2...
November 14, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29156291/engineering-the-next-generation-tin-containing-%C3%AE-titanium-alloys-with-high-strength-and-low-modulus-for-orthopedic-applications
#2
Sumit Bahl, Suvam Das, Satyam Suwas, Kaushik Chatterjee
Metastable β Ti alloys are the new emerging class of biomaterial for load bearing orthopedic applications. However, these alloys in the single β phase microstructure have insufficient strength for use in load bearing applications. It is imperative to strengthen these alloys by carefully designed thermo-mechanical processing routes that typically involve aging treatment. In this investigation two newly designed Sn based β Ti alloys of composition Ti-32Nb-(2, 4) Sn are evaluated. The effects of Sn content on the mechanical properties and biological performance of these alloys processed through designed thermo-mechanical processing route are investigated...
November 11, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29152495/midterm-outcomes-of-titanium-modular-femoral-necks-in-total-hip-arthroplasty
#3
Thurial Collet, Jean-Pierre Atanasiu, Jean-Baptiste de Cussac, Kamal Oufroukhi, Hugo Bothorel, Mo Saffarini, François Badatcheff
Background: Modular femoral necks present surgical and biomechanical advantages in total hip arthroplasty (THA), but their benefits remain controversial due to risks of corrosion and fracture at the additional junction. This study aimed to report 10-year survival and clinical outcomes of a titanium femoral stem with a titanium modular neck in consecutive series. Methods: The authors reviewed the records of 97 patients (99 THAs) using uncemented modular stem and ceramic-on-ceramic acetabular components...
October 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29131299/corrosion-of-titanium-part-1-aggressive-environments-and-main-forms-of-degradation
#4
Davide Prando, Andrea Brenna, Maria Vittoria Diamanti, Silvia Beretta, Fabio Bolzoni, Marco Ormellese, MariaPia Pedeferri
Titanium has outstanding corrosion resistance due to the external natural oxide protective layer formed when it is exposed to an aerated environment. Despite this, titanium may suffer different forms of corrosion in severe environments: uniform corrosion, pitting and crevice corrosion, hydrogen embrittlement, stress-corrosion cracking, fretting corrosion and erosion. In this first review, forms of corrosion affecting titanium are analyzed based on a wide literature review. For each form of corrosion, the mechanism and most severe environment are reported according to the current understanding...
November 11, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/29109336/corrosion-resistance-and-mechanical-properties-of-titanium-nitride-plating-on-orthodontic-wires
#5
Haruki Sugisawa, Hideki Kitaura, Kyosuke Ueda, Keisuke Kimura, Masahiko Ishida, Yumiko Ochi, Akiko Kishikawa, Saika Ogawa, Teruko Takano-Yamamoto
Titanium nitride (TiN) coating by ion plating has properties such as high hardness, wear resistance, corrosion resistance, and surface lubricity, therefore TiN coating is often used in various dental appliances and materials. In this study, we evaluated the corrosion behaviors and mechanical properties of TiN coated stainless steel (SS) and nickel titanium (Ni-Ti) orthodontic wires prepared by ion plating. TiN coating by ion plating improves the corrosion resistance of orthodontic wires. The corrosion pitting of the TiN coated wire surface become small...
November 3, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/29105561/failure-of-an-accis-metal-on-metal-hip-resurfacing-prosthesis-a-case-report
#6
Martin C Bone, Andrew Naylor
The introduction of coatings on joint replacements was intended to reduce wear volumes, prevent corrosion and reduce metal ion release. However, retrieval analysis to confirm their in vivo performance has been limited. The aim of study was to examine the coating on a retrieved hip prosthesis to determine whether substantial damage or wear had occurred. A single advanced ceramic-coated implant systems titanium niobium nitride-coated hip resurfacing prosthesis was retrieved for examination. Wear volumes and surface roughness were measured to quantify the damage to the articulating surfaces...
November 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29102795/enhanced-antimicrobial-activity-of-naturally-derived-bioactive-molecule-chitosan-conjugated-silver-nanoparticle-against-dental-implant-pathogens
#7
Darshan Devang Divakar, Nahla Talal Jastaniyah, Hazem Ganem Altamimi, Yasser Obaidallah Alnakhli, Muzaheed, Abdulaziz Abdullah Alkheraif, Shaista Haleem
Various metal coated implants have been tested against dental pathogens which causes increased biofilm formation and lead to failure of dental implants. The possibility of using nanoparticle together with native biomolecules to enhance the activity of such bioactive compound is also in progress. In this study we tested the efficacy of Ag conjugated chitosan nanoparticles as a prospective coating material of titanium dental implants. Known bioactive molecule chitosan was extracted from A. flavus Af09 and conjugated with Ag nanoparticle...
November 1, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29098919/current-methods-of-preventing-aseptic-loosening-and-improving-osseointegration-of-titanium-implants-in-cementless-total-hip-arthroplasty-a-review
#8
Dragos Apostu, Ondine Lucaciu, Cristian Berce, Dan Lucaciu, Dan Cosma
Hip osteoarthritis is the most common joint disorder, and is represented by a degenerative process, resulting in pain and functional impairment. If conservative treatment for hip osteoarthritis fails, the only remaining option is hip arthroplasty. Despite good survival of implants, loosening of components is the most common complication. This leads to revision surgeries, which are technically demanding, expensive, and result in a low satisfaction rate. Uncemented hip replacements require proper osseointegration for increased survival...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/29061284/corrosion-behavior-of-titanium-in-response-to-sulfides-produced-by-porphyromonas-gingivalis
#9
Rino Harada, Eitoyo Kokubu, Hideaki Kinoshita, Masao Yoshinari, Kazuyuki Ishihara, Eiji Kawada, Shinji Takemoto
OBJECTIVE: To investigate the effects of sulfides produced by Porphyromonas gingivalis (P. gingivalis) on the corrosion behavior of titanium. METHODS: Commercially pure titanium disks were mirror-polished and immersed in culture medium (BHI), spent medium after culturing P. gingivalis (BHI-S), and culture medium with P. gingivalis (BHI-P), and incubated aerobically at 37°C for 3-14 days. Titanium corrosion was evaluated through surface observation (using scanning electron microscope: SEM), color change (ΔE*ab), glossiness (Gs(20°)), chemical composition and state (using X-ray photoelectron spectroscopy: XPS), and titanium release...
October 20, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29058878/influence-of-porosity-and-pore-size-distribution-in-ti6al4-v-foam-on-physicomechanical-properties-osteogenesis-and-quantitative-validation-of-bone-ingrowth-by-micro-computed-tomography
#10
Kausik Kapat, Pavan Kumar Srivas, Arun Prabhu Rameshbabu, Priti Prasanna Maity, Subhodeep Jana, Joy Dutta, Pallab Majumdar, Debalay Chakrabarti, Santanu Dhara
Cementless fixation for orthopedic implants aims to obviate challenges associated with bone cement, providing long-term stability of bone prostheses after implantation. The application of porous titanium and its alloy-based implants is emerging for load-bearing applications due to their high specific strength, low stiffness, corrosion resistance, and superior osteoconductivity. In this study, coagulant-assisted foaming was utilized for the fabrication of porous Ti6Al4 V using egg-white foam. Samples with three different porosities of 68...
November 2, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29048694/effect-of-sleeved-ceramic-femoral-heads-on-titanium-ion-release
#11
Anthony Deny, Janie Barry, Jonathan R B Hutt, Martin Lavigne, Vincent Massé, Pascal-André Vendittoli
INTRODUCTION: Metal ion release from wear and corrosion at the femoral head-stem taper junction can evoke local adverse reactions to metal debris (ARMD). In a specific large-diameter head (LDH) total hip arthroplasty (THA) system, ceramic femoral heads of 44 to 48 mm are available with a titanium (Ti) adaptor sleeve, while heads of 36- to 40-mm come without sleeves. The hypothesis of this study is that the Ti adaptor sleeve with LDH ceramic-on-ceramic (CoC) bearings will not cause wear or corrosion at the taper junction and, thus, will not generate high whole blood Ti ion levels...
October 16, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29023369/tio%C3%A2-nanowire-networks-prepared-by-titanium-corrosion-and-their-application-to-bendable-dye-sensitized-solar-cells
#12
Saera Jin, Eunhye Shin, Jongin Hong
TiO₂ nanowire networks were prepared, using the corrosion of Ti foils in alkaline (potassium hydroxide, KOH) solution at different temperatures, and then a further ion-exchange process. The prepared nanostructures were characterized by field emission scanning electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The wet corroded foils were utilized as the photoanodes of bendable dye-sensitized solar cells (DSSCs), which exhibited a power conversion efficiency of 1.11% under back illumination...
October 12, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28983216/ceramic-bearings-with-titanium-adapter-sleeves-implanted-during-revision-hip-arthroplasty-show-minimal-fretting-or-corrosion-a-retrieval-analysis
#13
Chelsea N Koch, Mark Figgie, Mark P Figgie, Marcella E Elpers, Timothy M Wright, Douglas E Padgett
BACKGROUND: The BIOLOX® option system, consisting of a BIOLOX® delta ceramic femoral head with a titanium alloy adapter sleeve, is being increasingly utilized in revision hip arthroplasty. The sleeve protects the ceramic head from fracture and improper motion about the stem trunnion when a damaged trunnion is encountered at revision surgery. Corrosion and fretting due to metal-metal contact at the taper region of hip prosthesis create the potential of causing periprosthetic osteolysis and adverse local tissue reactions...
October 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28956213/initial-stage-of-the-biofilm-formation-on-the-niti-and-ti6al4v-surface-by-the-sulphur-oxidizing-bacteria-and-sulphate-reducing-bacteria
#14
Beata Cwalina, Weronika Dec, Joanna K Michalska, Marzena Jaworska-Kik, Sebastian Student
The susceptibility to the fouling of the NiTi and Ti6Al4V alloys due to the adhesion of microorganisms and the biofilm formation is very significant, especially in the context of an inflammatory state induced by implants contaminated by bacteria, and the implants corrosion stimulated by bacteria. The aim of this work was to examine the differences between the sulphur-oxidizing bacteria (SOB) and sulphate-reducing bacteria (SRB) strains in their affinity for NiTi and Ti6Al4V alloys. The biofilms formed on alloy surfaces by the cells of five bacterial strains (aerobic SOB Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans, and anaerobic SRB Desulfovibrio desulfuricans-3 strains) were studied using scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM)...
September 27, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28951027/fatigue-resistance-of-nickel-titanium-instruments-exposed-to-high-concentration-hypochlorite
#15
Xiangya Huang, Ya Shen, Xi Wei, Markus Haapasalo
INTRODUCTION: The purpose of this study was to introduce a new fatigue test model that simulates the clinical situation for evaluating the corrosion effect of 5.25% sodium hypochlorite (NaOCl) on nickel-titanium (NiTi) files and to evaluate the effect of 3 different temperatures (22°C, 37°C, and 60°C) on the cyclic fatigue of these files. METHODS: Three NiTi files (size 25/.04), K3 (SybronEndo, Orange, CA), K3XF (SybronEndo), and Vortex (Dentsply Tulsa Dental Specialties, Tulsa, OK), were subjected to cyclic fatigue tests inside a novel artificial ceramic canal with a curvature of 60° and a 5-mm radius...
November 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28937740/ab-initio-study-of-the-atomic-level-structure-of-the-rutile-tio2-110-titanium-nitride-tin-interface
#16
José Julio Gutiérrez Moreno, Michael Nolan
Titanium nitride (TiN) is widely used in industry as a protective coating due to its hardness and resistance to corrosion and can spontaneously form a thin oxide layer when it is exposed to air, which could modify the properties of the coating. With limited understanding of the TiO2-TiN interfacial system at present, this work aims to describe the structural and electronic properties of oxidized TiN based on a density functional theory (DFT) study of the rutile TiO2(110)-TiN(100) interface model system, also including Hubbard +U correction on Ti 3d states...
October 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28925491/corrosion-behavior-of-dental-implants-immersed-into-human-saliva-preliminary-results-of-an-in-vitro-study
#17
M Barbieri, F Mencio, P Papi, D Rosella, S Di Carlo, T Valente, G Pompa
OBJECTIVE: Over the years, different implant surfaces have been used to try to maximize bone to implant contact. The aim of this study was to compare levels of metallic ions and particles dissolution collected from two different dental implants surfaces immersed into human saliva. PATIENTS AND METHODS: A total of 60 dental implants were tested. Group A: sanded with aluminium oxide medium grade particles and acid-etched; Group B: micro-sanded with calcium phosphate powders and acid-etched...
August 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28916465/corrosive-effects-of-fluoride-on-titanium-under-artificial-biofilm
#18
Azusa Fukushima, Gen Mayanagi, Keiichi Sasaki, Nobuhiro Takahashi
PURPOSE: This study aimed to investigate the effect of sodium fluoride (NaF) on titanium corrosion using a biofilm model, taking environmental pH into account. METHODS: Streptococcus mutans cells were used as the artificial biofilm, and pH at the bacteria-titanium interface was monitored after the addition of 1% glucose with NaF (0, 225 or 900ppmF) at 37°C for 90min. In an immersion test, the titanium samples were immersed in the NaF solution (0, 225 or 900ppm F; pH 4...
September 12, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28913542/metal-release-profiles-of-orthodontic-bands-brackets-and-wires-an-in-vitro-study
#19
B Wendl, H Wiltsche, E Lankmayr, H Winsauer, A Walter, A Muchitsch, N Jakse, M Wendl, T Wendl
AIM: The present study evaluated the temporal release of Co Cr, Mn, and Ni from the components of a typical orthodontic appliance during simulated orthodontic treatment. MATERIALS AND METHODS: Several commercially available types of bands, brackets, and wires were exposed to an artificial saliva solution for at least 44 days and the metals released were quantified in regular intervals using inductively coupled plasma quadrupole mass spectrometry (ICP-MS, Elan DRC+, Perkin Elmer, USA)...
November 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/28898721/multifunctional-zirconium-nitride-copper-multilayer-coatings-on-medical-grade-316l-ss-and-titanium-substrates-for-biomedical-applications
#20
D Dinesh Kumar, Gobi Saravanan Kaliaraj
Protecting from wear and corrosion of many medical devices in the biomedical field is an existing scientific challenge. Surface modification with multilayer ZrN/Cu coating was deposited on medical grade stainless steel (SS) and titanium substrates to enhance their surface properties. Structural results revealed that the ZrN/Cu coatings are highly crystalline and uniform microstructure on both the substrates. Dry and wet tribological measurements of the coated titanium substrate exhibit enhanced wear resistance and low friction coefficient due to the improved microstructure...
September 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
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