In vitro evaluation of physical vapor deposition coated beta titanium orthodontic archwires

Krishnan, Vinod; Ravikumar, K. K.; Sukumaran, K.; Kumar, K Jyothindra

doi:10.2319/040811-251.1

Cited by 12 publications

(18 citation statements)

References 14 publications

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“…They concluded that Ag-Pt coatings provide good antimicrobial activity during active orthodontic treatment. Krishnan et al [66] coated beta titanium orthodontic archwires with titanium aluminum nitride (TiAlN) and tungsten carbide/carbon (WC/C) using PVD and evaluated frictional properties, surface morphology, and load deflection rate. They found that WC/C archwires demonstrated reduced frictional properties, better surface characteristics, and low load deflection rate compared with TiAlN and uncoated archwires.…”

Section: Physical Vapor Deposition (Pvd)mentioning

confidence: 99%

Coating and Surface Treatments on Orthodontic Metallic Materials

2012

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Metallic biomaterials have been extensively used in orthodontics throughout history. Gold, stainless steel, cobalt-chromium alloys, titanium and its alloys, among other metallic biomaterials, have been part of the orthodontic armamentarium since the twentieth century. Metals and alloys possess outstanding properties and offer numerous possibilities for the fabrication of orthodontic devices such as brackets, wires, bands, ligatures, among others. However, these materials have drawbacks that can present problems for the orthodontist. Poor friction control, allergic reactions, and metal ionic release are some of the most common disadvantages found when using metallic alloys for manufacturing orthodontic appliances. In order to overcome such weaknesses, research has been conducted aiming at different approaches, such as coatings and surface treatments, which have been developed to render these materials more suitable for orthodontic applications. The purpose of this paper is to provide an overview of the coating and surface treatment methods performed on metallic biomaterials used in orthodontics.

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Section: Physical Vapor Deposition (Pvd)mentioning

confidence: 99%

Coating and Surface Treatments on Orthodontic Metallic Materials

2012

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“…Optical profilometer findings in control group show that surface roughness of TMA is significantly higher than that of LF and HD, which is in concurrence with previous results. [61718] Because those studies had used different evaluation methods, quantitative comparison of the surface deterioration of our study with theirs was not possible. This is in contradiction to the findings of Kusy who concluded that the surface roughness cannot be drastically reduced by ion implantation.…”

Section: Discussionmentioning

confidence: 99%

“…This is in line with previous findings. [917] The lower load deflection properties of the colored TMA wires might be due to the etching and heating process, while coating is performed over archwire blanks. [9] There were no significant differences between HD and LF.…”

Section: Discussionmentioning

confidence: 99%

Effect of oral environment and prescribed fluoride mouthwashes on different types of TMA wires – An in-vivo study

et al. 2019

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OBJECTIVE: The aim of this study was to investigate the effect of intraoral conditions and fluoride mouthwashes on mechanical properties and surface characteristics of different types of titanium molybdenum alloy (TMA) wires. MATERIALS AND METHODS: Three types of TMA wires of dimension 0.017” × 0.025” [1. Standard TMA (TMA), 2. ion-implanted, low-friction TMA (LF) and 3. Colored, Honey Dew TMA (HD)] were tested in three conditions as three groups; A) Control (as received), B) No fluoride (following intraoral use without fluoride) and C) Fluoride (following intraoral use with fluoride rinses). Surface roughness was evaluated using 3D Optical Profilometer. Three point bending tests were done to evaluate load deflection characteristics (LDR), ultimate tensile strength (UTS), and Young's modulus (E). Statistical evaluation was done using one-way analysis of variance (ANOVA), Bonferroni multiple comparison, and paired t -tests. RESULTS: Control group TMA exhibited significantly higher surface roughness, peak height, and LDR as well as lower UTS and E when compared to LF and HD ( P < 0.001). In nonfluoride group, the surface roughness and LDR increased significantly for all three types of wires ( P < 0.001). The UTS and E showed a significant decrease ( P < 0.001). Additional use of fluoride mouthwashes (fluoride group) further increased surface roughness and LDR and decreased the UTS and E ( P < 0.001). CONCLUSION: The ion-implanted LF/HD varieties had better surface smoothness, lower LDR, higher UTS, and higher E than standard TMA in the control group, pointing towards a better efficiency of these wires. Intraoral conditions significantly increased surface roughness and deteriorated mechanical properties of all types of TMA wires. With the use of daily fluoride mouthwashes, the deterioration was much worse.

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“… 12 - 14 Research has accordingly targeted different approaches, including surface treatments and coatings to further reduce friction between the bracket and archwire. 18 - 21 …”

Section: Introductionmentioning

confidence: 99%

“… 26 Another coating technique, physical vapor deposition, was used to coat beta titanium orthodontic archwires with titanium aluminum nitride and tungsten carbide/carbon for the assessment of frictional properties, the surface morphology, and the load deflection rate. 18 Radio frequency (RF) magnetron sputtering is another technique used for coating orthodontic materials. This technique removes surface atoms from a solid cathode (target) by bombarding it with positive ions from an inert gas discharge; then, it deposits the surface atoms on the surface to form a thin film.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of medical coating materials in decreasing friction between orthodontic brackets and archwires

et al. 2021

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Objective The aim of this in vitro study was to evaluate the changes in friction between orthodontic brackets and archwires coated with aluminum oxide (Al 2 O 3 ), titanium nitride (TiN), or chromium nitride (CrN). In addition, the resistance of the coatings to intraoral conditions was evaluated. Methods Stainless steel canine brackets, 0.016-inch round nickel–titanium archwires, and 0.019 × 0.025-inch stainless steel archwires were coated with Al 2 O 3 , TiN, and CrN using radio frequency magnetron sputtering. The coated materials were examined using scanning electron microscopy, an X-ray diffractometer, atomic force microscopy, and surface profilometry. In addition, the samples were subjected to thermal cycling and in vitro brushing tests, and the effects of the simulated intraoral conditions on the coating structure were evaluated. Results Coating of the metal bracket as well as nickel–titanium archwire with Al 2 O 3 reduced the coefficients of friction (CoFs) for the bracket–archwire combination ( p < 0.01). When the bracket and stainless steel archwire were coated with Al 2 O 3 and TiN, the CoFs were significantly lower (0.207 and 0.372, respectively) than that recorded when this bracket–archwire combination was left uncoated (0.552; p < 0.01). The friction, thermal, and brushing tests did not deteriorate the overall quality of the Al 2 O 3 coatings; however, some small areas of peeling were evident for the TiN coatings, whereas comparatively larger areas of peeling were observed for the CrN coatings. Conclusions Our findings suggest that the CoFs for metal bracket–archwire combinations used in orthodontic treatment can be decreased by coating with Al 2 O 3 and TiN thin films.

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In vitro evaluation of physical vapor deposition coated beta titanium orthodontic archwires

Cited by 12 publications

References 14 publications

Coating and Surface Treatments on Orthodontic Metallic Materials

Coating and Surface Treatments on Orthodontic Metallic Materials

Effect of oral environment and prescribed fluoride mouthwashes on different types of TMA wires – An in-vivo study

Effectiveness of medical coating materials in decreasing friction between orthodontic brackets and archwires

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