Improved corrosion resistance and antibacterial properties of composite arch-wires by N-doped TiO<sub>2</sub>coating

Liu, Jiming; Lou, Yixin; Zhang, Chao; Yin, Shuo; Li, Hongmei; Sun, Daqin

doi:10.1039/c7ra06960j

Cited by 31 publications

(30 citation statements)

References 44 publications

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“…Corrosion behavior is often one of the key characteristic of metallic material, as cytotoxicity and biocompatibility are related to the corrosion process products. According to reports, 46% of patients who are treated with fixed appliances, will suffer from demineralization within 12 months [ 14 , 15 ]. Much research has been done on reducing the friction between brackets and archwires using surface treatments such as ion implantation, polyethylene coating and poly(tetrafluoroethylene) coating on the archwires and/or brackets.…”

Section: Introductionmentioning

confidence: 99%

“…Radiofrequency magnetron sputtering is an effective technique on account of its inherent versatility, low-temperature deposition and uniform surface coverage [ 15 , 38 , 39 ]. The sputtering method removes surface atoms from a solid cathode by bombarding it with positive ions from an inert gas, for example argon, discharges, and next deposits them on the surface to create a thin layer.…”

Section: Introductionmentioning

confidence: 99%

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Functional Coatings for Orthodontic Archwires—A Review

et al. 2020

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In this literature review, the current state-of-art of coatings for orthodontic archwires’ increasing antimicrobial and relevant mechanical properties, such as surface topography, friction or corrosion resistance, has been presented. There is a growing request for orthodontic appliances, therefore, most researchers focus on innovative functional coatings to cover orthodontic archwires and brackets. Orthodontic appliances are exposed to the unfavorable oral cavity environment, consisting of saliva flow, food, temperature and appliance force. As a consequence, friction or biocorrosion processes may occur. This can affect the functionality of the orthodontic elements, causing changes in their microstructure, surface topography and mechanical properties. Furthermore, the material which the orthodontic archwire is made from is of particular importance in terms of the possible corrosion resistance. This is especially important for patients who are hypersensitive to metals, for example, nickel, which causes allergic reactions. In the literature, there are some studies, carried out in vitro and in vivo, mostly examining the antibacterial, antiadherent, mechanical and roughness properties of functional coatings. They are clinically acceptable but still some properties have to be studied and be developed for better results. In this paper the influence of additives such as nanoparticles of silver and nitrogen-doped TiO2 applied on orthodontic brackets by different methods on the antimicrobial properties was analyzed. Future improvement of coating techniques as well as modification of the archwire composition can reduce the release of nickel ions and eliminate friction and bacterial adhesion problems, thus accelerating treatment time.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functional Coatings for Orthodontic Archwires—A Review

et al. 2020

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“…A representative example of this great multifunctionality related to TiO 2 NPs can be found in Reference [54], where its specific mechanism action is clearly explained, whereas potential applications of titanium dioxide materials can be found in Reference [55]. According to this, the use of these nanoparticles makes possible the fabrication of advanced coatings with improved corrosion resistance and antibacterial properties due to its intrinsic excellent antimicrobial properties [56,57]. Moreover, other research of the TiO 2 -based materials can be found in environmental and energy related applications, such as photocatalysis and photovoltaics [58,59].…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic and Corrosion Behavior of Sol-Gel Hybrid Coatings Based on the Combination of TiO2 NPs and Fluorinated Chains for Aluminum Alloys Protection

Rivero

Maeztu

Berlanga

et al. 2018

Metals

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In this work, layers of a sol-gel hybrid matrix doped with metal oxide nanoparticles (TiO2 NPs) have been deposited on flat samples of AA6061-T6 aluminum alloy using the dip-coating technique, with the aim of obtaining coatings with better anti-corrosive and hydrophobic properties. Two different organic modified silica alkoxides, namely 3-(glycidyloxypropyl)trimethoxysilane (GPTMS) and methyltriethoxysilane (MTEOS), have been used for an adequate entrapment of the metal oxide nanoparticles. In addition, a fluorinated metal-alkoxide precursor has also been added to the hybrid matrix in order to improve the hydrophobic behavior. The experimental results corroborate that the presence of these TiO2 NPs play an important role in the development of the sol-gel hybrid coatings. The water contact angle (WCA) measurements, as well as pencil hardness tests indicate that TiO2 NPs make a considerable increase in the resultant hydrophobicity possible, with better mechanical properties of the coatings. The coating thickness has been measured by cross-section scanning electron microscopy (SEM). In addition, a glow discharge optical emission spectroscopy (GD-OES) analysis has been carried out in order to corroborate the adequate entrapment of the TiO2 NPs into the sol-gel coatings. Finally, potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS) have been performed in order to evaluate the corrosion resistance of the coatings. All the results provide insights into the efficacy of the developed sol-gel hybrid coatings for anticorrosive purposes with good mechanical properties.

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“…Namely, the Raman spectrum obtained from the “black spots” found in the unexposed and both exposed SS samples resembles the Raman signature of anatase (polymorph modification of TiO 2 ) (Ohsaka, Izumi, & Fujiki, ). This thin‐film coating aims to improve corrosion resistance and antibacterial properties (Ghasemi et al, ; Liu et al, ; Özyildiz et al, ).…”

Section: Resultsmentioning

confidence: 99%

Effects of the presence of probiotic bacteria in the aging medium on the surface roughness and chemical composition of two dental alloys

Trolić

Todorić

Acev

et al. 2019

Microscopy Res & Technique

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The aims of this study were: (a) to determine if the presence of probiotic bacteria in an aging medium, that is, artificial saliva in this study, has relevant effects on the surface roughness and the chemical composition of two main alloys used in dentistry (NiTi and stainless steel [SS]) and (b) in the case of NiTi, if these effects are influenced by the coating of the alloy (rhodium and titanium nitride). Atomic force microscopy and Raman spectroscopy were used to study the surface morphology and identify metal oxides formed on the surface of the alloys. Experiments demonstrated that the probiotic bacteria Lactobacillus reuteri can induce processes that alter some features of the surface such as roughness and chemical composition. The effect is dependent on the type of alloy and coating. The bacteria increased roughness in the case of uncoated NiTi more than saliva alone (pH = 4.8). Probiotic bacteria tend to decrease the corrosive influence of saliva on NiTi when the alloy is coated with rhodium or titanium nitride and this effect was also evidenced on SS. Raman spectroscopy confirmed that only SS samples are prone to oxidation processes, predominantly associated with exposure to saliva rather than probiotic bacteria.

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Improved corrosion resistance and antibacterial properties of composite arch-wires by N-doped TiO₂coating

Abstract: In this paper, composite arch-wires (CAWs) coated with TiO2 and N-doped TiO2 nanocrystal thin films were fabricated.

Cited by 31 publications

References 44 publications

Functional Coatings for Orthodontic Archwires—A Review

Functional Coatings for Orthodontic Archwires—A Review

Hydrophobic and Corrosion Behavior of Sol-Gel Hybrid Coatings Based on the Combination of TiO2 NPs and Fluorinated Chains for Aluminum Alloys Protection

Effects of the presence of probiotic bacteria in the aging medium on the surface roughness and chemical composition of two dental alloys

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Improved corrosion resistance and antibacterial properties of composite arch-wires by N-doped TiO2coating

Abstract: In this paper, composite arch-wires (CAWs) coated with TiO2 and N-doped TiO2 nanocrystal thin films were fabricated.

Cited by 31 publications

References 44 publications

Functional Coatings for Orthodontic Archwires—A Review

Functional Coatings for Orthodontic Archwires—A Review

Hydrophobic and Corrosion Behavior of Sol-Gel Hybrid Coatings Based on the Combination of TiO2 NPs and Fluorinated Chains for Aluminum Alloys Protection

Effects of the presence of probiotic bacteria in the aging medium on the surface roughness and chemical composition of two dental alloys

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Improved corrosion resistance and antibacterial properties of composite arch-wires by N-doped TiO₂coating