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titanium corrosion

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https://www.readbyqxmd.com/read/29772348/biosafety-stability-and-osteogenic-activity-of-novel-implants-made-of-zr-70-ni-16-cu-6-al-8-bulk-metallic-glass-for-biomedical-application
#1
Hiroto Ida, Masahiro Seiryu, Nobuo Takeshita, Masanari Iwasaki, Yoshihiko Yokoyama, Yusuke Tsutsumi, Etsuko Ikeda, Satoshi Sasaki, Shunro Miyashita, Shutaro Sasaki, Tomohiro Fukunaga, Toru Deguchi, Teruko Takano-Yamamoto
Superior mechanical and chemical properties of Zr70 Ni16 Cu6 Al8 bulk metallic glass (BMG) demonstrate its promise as a novel biomaterial for fabrication of implants. The aim of the present study was to validate mechanical, chemical, and biological properties of Zr70 Ni16 Cu6 Al8 BMG through comparison with titanium (Ti). Our data indicated higher tensile strength, lower Young's modulus, and reduced metal ion release of Zr70 Ni16 Cu6 Al8 BMG compared with Ti. Biosafety of bone marrow mesenchymal cells on Zr70 Ni16 Cu6 Al8 BMG was comparable to that of Ti...
May 14, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29756511/surface-integrity-of-polyethylene-liners-following-trunnionosis-of-a-dual-modular-neck-total-hip-implant
#2
Ben Gi Spiegelberg, Brent A Lanting, James L Howard, Matthew G Teeter, Douglas Dr Naudie
BACKGROUND: There has been a trend in the evolution of total hip arthroplasty towards increased modularity; with this increase in modularity come some potentially harmful consequences. Modularity at the neck shaft junction has been linked to corrosion, adverse reaction to metal debris and pseudotumour formation. AIM: The aim of this retrieval study is to assess whether the surface integrity of the polyethylene (PE) liner is affected by metal wear debris in a single implant design series of THA revised for trunnionosis...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/29752078/length-dependent-corrosion-behavior-ni-2-release-cytocompatibility-and-antibacterial-ability-of-ni-ti-o-nanopores-anodically-grown-on-biomedical-niti-alloy
#3
Ruiqiang Hang, Yanlian Liu, Long Bai, Xiangyu Zhang, Xiaobo Huang, Husheng Jia, Bin Tang
In the present work, nickel-titanium-oxygen nanopores with different length (0.55-114 μm) were anodically grown on nearly equiatomic nickel-titanium (NiTi) alloy. Length-dependent corrosion behavior, nickel ion (Ni2+ ) release, cytocompatibility, and antibacterial ability were investigated by electrochemical, analytical chemistry, and biological methods. The results show constructing nanoporous structure on the NiTi alloy improve its corrosion resistance. However, the anodized samples release more Ni2+ than that of the bare NiTi alloy, suggesting chemical dissolution of the nanopores rather than electrochemical corrosion governs the Ni2+ release...
August 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29738600/adapter-sleeves-are-not-needed-to-reduce-the-risk-of-fracture-of-a-new-ceramic-head-implanted-on-a-well-fixed-stem
#4
Young-Hoo Kim, Jang-Won Park, Jun-Shik Kim
The purpose of this study was to assess (1) the prevalence of the fracture of ceramic heads implanted on used trunnions of well-fixed stems without using a titanium adapter sleeve; (2) the prevalence of trunnionosis secondary to fretting and/or corrosion at the trunnion of the well-fixed stem; and (3) clinical and radiographic results and the survival rate of the revised acetabular components. Eighty-eight patients (100 hips) underwent isolated revision of the acetabular components for polyethylene wear and osteolysis of the acetabulum...
May 8, 2018: Orthopedics
https://www.readbyqxmd.com/read/29736498/artificial-mucin-based-saliva-preparations-physicochemical-and-tribological-properties
#5
Joanna Mystkowska, Halina Car, Jan Ryszard Dąbrowski, Justyna Romanowska, Marcin Klekotka, Anna Justyna Milewska
PURPOSE: To create and investigate artificial mucin-based saliva substitutes with properties similar to natural saliva. MATERIALS AND METHODS: Natural saliva and six saliva preparations were tested. Saliva substitutes were made using phosphate buffered saline (PBS) prepared in deionised water or plasma-treated water (PBSPT) with addition of porcine gastric mucin and guar gum or poloxamer 407. A wide range of properties were characterised: physicochemical (changes of pH, conductivity and surface tension over time: 1, 24, 96, 168 h after mixing ingredients), rheological (viscosity and viscoelasticity), tribological (coefficient of friction for titanium alloy Ti-6Al-7Nb kinematic couple) and corrosive (open circuit potential, corrosion potential, polarisation resistance)...
2018: Oral Health & Preventive Dentistry
https://www.readbyqxmd.com/read/29709241/in-vitro-and-in-vivo-studies-of-anti-bacterial-copper-bearing-titanium-alloy-for-dental-application
#6
Rui Liu, Yulong Tang, Lilan Zeng, Ying Zhao, Zheng Ma, Ziqing Sun, Liangbi Xiang, Ling Ren, Ke Yang
OBJECTIVE: A novel copper-bearing titanium alloy (Ti-Cu) was fabricated for dental application that is expected to efficiently restrain the growth of bacteria and discourage biofilm formation. The aim of this study was to investigate both the antibacterial activity and biofilm inhibition of Ti-Cu alloy in vitro, and the antibacterial effect of Ti-Cu implant in early stage of peri-implantitis in vivo. METHODS: Staphylococcus aureus and Escherichia coli were selected to evaluate the antibacterial activity of Ti-Cu alloy and Ti served as control...
April 27, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29677747/microstructural-evolution-and-electrochemical-properties-of-hrdsr-az61-x-x-ca-ti-alloys
#7
Min Gyu Kim, Woo Jin Kim, Gyeung-Ho Kim, Kwon-Koo Cho, Jun Hyun Han, Hye Sung Kim
The microstructure and corrosion properties of as-cast AZ61 (Mg-6%Al-1%Zn) and AZ61 alloys doped with titanium and calcium and subjected to high ratio differential speed rolling were investigated. Addition of the alloying elements to the AZ61 alloy resulted in remarkable modification of the morphology and the amount of continuous β (Mg17Al12)-phase. Addition of Ti to the as-cast AZ61 alloy causes a decrease in the volume fraction (or discontinuity of the β-phase), leading to strong anodic dissolution. In contrast, addition of Ca to the as-cast AZ61 alloy is rather effective for preventing pitting corrosion...
September 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29677150/mapping-the-galvanic-corrosion-of-three-coupled-metal-alloys-using-coupled-multielectrode-array-influence-of-chloride-ion-concentration
#8
Hong Ju, JinZhuo Duan, Yuanfeng Yang, Ning Cao, Yan Li
The galvanic corrosion behavior of three metal alloys commonly used in water desalination plants was investigated using coupled multielectrode arrays consisting of aluminum-brass (HAl77-2), titanium alloy (TA2), and 316L stainless steel (316L SS). The three electrode types were coupled galvanically and arranged in different geometric configurations. Their corrosion behavior was characterized as a function of the chloride concentration. The potential and current distributions of the three-electrode coupling systems display electrochemical inhomogeneity...
April 20, 2018: Materials
https://www.readbyqxmd.com/read/29624363/improvement-of-corrosion-and-tribocorrosion-behavior-of-pure-titanium-by-sub-zero-anodic-spark-oxidation
#9
Mohammad Fazel, Hamid Reza Salimijazi, Morteza Shamanian
The present investigation reports corrosion and tribocorrosion behavior of Anodic Spark Oxidation (ASO) coatings formed at 20̊C and -10̊C temperatures. The SEM micrographs showed the volcanic morphology of both oxide layers. However, despite the numerous open pores on the 20̊C formed layers, the plasma discharged channels were blocked on the surfaces of the sub-zero ASO coatings. According to polarization curves, the -10̊C treated samples showed a significant increase in the corrosion resistance (jcorr of 0...
April 6, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29623422/the-role-of-citrate-lactate-and-transferrin-in-determining-titanium-release-from-surgical-devices-into-human-serum
#10
Justin P Curtin, Minji Wang, Tianfan Cheng, Lijian Jin, Hongzhe Sun
The presence of ionic titanium in the serum of patients with titanium implants is currently unexplained. This is presumed due to corrosion, and yet the serum titanium concentration measured in patients is far greater than that predicted by its solubility. The binding of titanium ion as Ti(IV) to human transferrin (hTF) in serum indicates that Ti(IV) ions interact with human physiology. This is an intriguing finding since there is currently no known role for titanium ions in human physiology. Thus, understanding the factors that determine in vivo titanium ion release is relevant to further understanding this metal's interactions with human biochemistry...
April 5, 2018: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/29603699/evaluation-of-the-effects-of-fluoride-prophylactic-agents-on-mechanical-properties-of-nickel-titanium-wires-using-scanning-electron-microscope
#11
Ajay K Gupta, Gita Shukla, Poonam Sharma, Amit K Gupta, Amit Kumar, Deepika Gupta
INTRODUCTION: Orthodontic treatment these days is increasing in demand, and therefore, it is relatively imperative for the orthodontist to prescribe the use of fluoride-containing products, such as mouthwashes and gels, to help prevent dental caries and maintain healthy oral health. The aim of the study was to assess and evaluate the effects of fluoride prophylactic agents on mechanical properties of nickel titanium (NiTi) wires during orthodontic treatment using scanning electron microscope (SEM)...
March 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29587427/surface-modification-of-ti-35nb-10ta-1-5fe-by-the-double-acid-etching-process
#12
Joan Lario, Angélica Amigó, Francisco Segovia, Vicente Amigó
Surface topography and composition influence the osteoblastic proliferation and osseointegration rates, which favor the biomechanical stability of bone anchoring and implants. In recent years, beta titanium alloys have been developed, and are composed of biocompatible elements, have low elastic modulus, high corrosion resistance, and mechanical properties to improve the long performance behavior of biomaterials. In the present research, the influence of the acid-etching process was studied in Ti6Al4V ELI and Ti35Nb10Ta1...
March 26, 2018: Materials
https://www.readbyqxmd.com/read/29578825/reduction-of-tribocorrosion-products-when-using-the-platform-switching-concept
#13
G O Alrabeah, J C Knowles, H Petridis
The reduced marginal bone loss observed when using the platform-switching concept may be the result of reduced amounts of tribocorrosion products released to the peri-implant tissues. Therefore, the purpose of this study was to compare the tribocorrosion product release from various platform-matched and platform-switched implant-abutment couplings under cyclic loading. Forty-eight titanium implants were coupled with pure titanium, gold alloy, cobalt-chrome alloy, and zirconia abutments forming either platform-switched or platform-matched groups ( n = 6)...
March 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29569457/titanium-tsme-appliance-for-patients-allergic-to-nickel
#14
C Maspero, G Galbiati, L Giannini, G Guenza, L Esposito, G Farronato
AIM: The aim of this article is to describe the use of a titanium TSME appliance for patients with allergy to resin and nickel. We aim to highlight the optimal way to avoid problems such as stomatitis and peri-labial dermatitis, which generally appear in patients who use traditional orthodontic appliances made in acrylic resin and steel. MATERIALS AND METHODS: The construction of a titanium appliance is described and a case treated with it is reported. RESULTS: The titanium TSME presented in this paper has excellent biocompatibility due to its ability to form superficial oxides, which prevent oxidation and thus corrosion...
March 2018: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29551382/electrochemical-behavior-of-titanium-exposed-to-a-biofilm-supplemented-with-different-sucrose-concentrations
#15
João Gabriel Silva Souza, Thamara Beline, Adaias Oliveira Matos, Bárbara Emanoele Costa Oliveira, Antônio Pedro Ricomini-Filho, Valentim Adelino Ricardo Barão
STATEMENT OF PROBLEM: Biofilms can reduce the corrosion resistance of titanium because of the bacterial metabolism of fermentable carbohydrates, including sucrose. However, studies evaluating whether biofilms exposed to higher sucrose concentrations can affect the electrochemical behavior of titanium are lacking. PURPOSE: The purpose of this in vitro study was to test the electrochemical behavior of titanium previously exposed to biofilm supplemented with different sucrose concentrations...
March 15, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29532603/electrochemical-and-biological-characterization-ha-al-2-o-3-ysz-nano-composite-coatings-using-electrophoretic-process
#16
Nayereh Askari, Mardali Yousefpour, Masoud Rajabi
In this research work, hydroxyapatite/alumina/YSZ bio nanocomposite coatings on titanium substrate were created by electrophoretic deposition (EPD) and reaction bonding process. By using the EPD process, uniform green form coatings containing HA, yttria-stabilized zirconia (YSZ), and aluminum particles were produced on titanium. After oxidation of aluminum at 660°C and sintering at 850°C, a dense and adherent HA/Al2 O3 /YSZ coating was produced. Scanning electron microscopy, X-ray diffractometric and mechanical tests were employed to investigate the morphologies, compositions, hardness, toughness and bonding strength of the coatings...
March 13, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29530821/zinc-based-alloys-for-degradable-vascular-stent-applications
#17
REVIEW
Ehsan Mostaed, Malgorzata Sikora-Jasinska, Jaroslaw W Drelich, Maurizio Vedani
The search for biodegradable metals with mechanical properties equal or higher to those of currently used permanent biomaterials, such as stainless steels, cobalt chromium and titanium alloys, desirable in vivo degradation rate and uniform corrosion is still an open challenge. Magnesium (Mg), iron (Fe) and zinc (Zn)-based alloys have been proposed as biodegradable metals for medical applications. Over the last two decades, extensive research has been done on Mg and Fe. Fe-based alloys show appropriate mechanical properties, but their degradation rate is an order of magnitude below the benchmark value...
April 15, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29522263/in-vitro-evaluation-of-cell-compatibility-of-dental-cements-used-with-titanium-implant-components
#18
Jason C Marvin, Silvia I Gallegos, Shaida Parsaei, Danieli C Rodrigues
PURPOSE: To evaluate the biocompatibility of five dental cement compositions after directly exposing human gingival fibroblast (HGF) and MC3T3-E1 preosteoblast cells to cement alone and cement applied on commercially pure titanium (cpTi) specimens. MATERIALS AND METHODS: Nanostructurally integrated bioceramic (NIB), resin (R), resin-modified glass ionomer (RMGIC), zinc oxide eugenol (ZOE), and zinc phosphate (ZP) compositions were prepared according to the respective manufacturer's instructions...
March 9, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29521461/wear-and-corrosion-interactions-at-the-titanium-zirconia-interface-dental-implant-application
#19
Craig L Sikora, Maria F Alfaro, Judy Chia-Chun Yuan, Valentim A Barao, Cortino Sukotjo, Mathew T Mathew
PURPOSE: Dental implants have been shown to have predictable success, but esthetic complications often arise. To reduce tissue shadowing from titanium, zirconia abutments may be used; however, the literature suggests that the use of zirconia leads to greater destruction of the implant interface that may result in biological complications such as titanium tattoos and heavy metal toxicity. Previous studies have examined the mechanical aspects of this implant/abutment relationship, but they have not accounted for the corrosive degradation that also takes place in the dynamic environment of the oral cavity...
March 9, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29520936/effects-of-the-hierarchical-macro-mesoporous-structure-on-the-osteoblast-like-cell-response
#20
Ranran Zhang, Tarek A Elkhooly, Qianli Huang, Xujie Liu, Xing Yang, Hao Yan, Zhiyuan Xiong, Jing Ma, Qingling Feng, Zhijian Shen
To improve the success of medical devices, implants with strong surface bioactivity are urgently required. Coatings with a macroporous structure produced by micro-arc oxidation possess advantages, such as strong adhesion to substrate and excellent resistance to wear and corrosion. Mesoporous structures contain pores with sizes of 2-50 nm, which can endow the biomaterials with the ability to enhance osteogenesis and to be loaded with diverse drugs. Thus, in this study, we aimed to evaluate the effects of both macroporous and mesoporous structures using a hierarchical macro/mesoporous structure to modify the titanium implant surface...
March 9, 2018: Journal of Biomedical Materials Research. Part A
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