Relationship between static friction and surface wettability of orthodontic brackets coated with diamond-like carbon (DLC), fluorine- or silicone-doped DLC coatings

Akaike, Shun; Kobayashi, Daishiro; Aono, Yuko; Hiratsuka, Masanori; Hirata, Atsushi; Hayakawa, Tohru; Nakamura, Yoshiki

doi:10.1016/j.diamond.2015.11.016

Cited by 47 publications

(36 citation statements)

References 34 publications

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“…The SUS sensor was prepared by sputter coating (CS200, ULVAC, Kanagawa, Japan) with the use of a SUS 304 target. Each DLC coating was performed by the direct current-pulsed plasma-enhanced chemical vapor deposition method (DC-pulsed PECVD; NPS-330, Nanotec, Chiba, Japan) 11) . The source gas for DLC and F-DLC coating was C2H2 and C6F6, respectively, and the base substrate under DLC and F-DLC layers is gold.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Previously, we reported that homogeneous DLC-coated orthodontic brackets significantly reduced static friction between brackets and wires under both dry and wet conditions 10) . Moreover, fluorine-doped DLC (F-DLC) and silicon-doped DLC (Si-DLC) coatings were deposited onto brackets and frictional properties between coated brackets and wires under dry and wet conditions were characterized 11) . DLC, F-DLC and Si-DLC coatings provided a significant reduction in static friction, and F-DLC-coated brackets exhibited the significantly lowest static friction between the bracket and wire under wet conditions, which was lower than that under dry conditions, among the three tested coatings.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of protein adsorption to diamond-like carbon (DLC) and fluorinedoped DLC films using the quartz crystal microbalance method

et al. 2019

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The aim of the present study was to evaluate albumin adsorption to stainless steel (SUS), diamond-like carbon (DLC) and fluorinedoped DLC (F-DLC) films using the quartz crystal microbalance (QCM) method. Each sensor was characterized using atomic force microscopy, surface roughness and surface wettability measurements and surface free energy calculations. Adsorbed amounts of bovine serum albumin on DLC and F-DLC were significantly lower than that on SUS (p<0.05). The apparent first-order reaction rate, kobs, of F-DLC was significantly larger than those of SUS and DLC (p<0.05). Moreover, significantly lower total surface free energies of DLC and F-DLC influenced the albumin absorbed amounts and kobs. Furthermore, a clear correlation was found between the albumin absorbed amounts and the hydrogen bond component of the total surface free energy. Thus, DLC or F-DLC coating is effective for preventing protein adsorption on orthodontic appliances.

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Section: Sample Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of protein adsorption to diamond-like carbon (DLC) and fluorinedoped DLC films using the quartz crystal microbalance method

et al. 2019

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“…Many attempts have been made to use coatings which show extremely low wear in technical applications, such as diamond-like carbon (DLC) [3]. DLC coatings have not only been applied to load bearing implants [4], but also in static applications such as orthodontic brackets [5] and stents [6]. However, transferring a coating from a technical to a medical application was not straightforward.…”

Section: Introductionmentioning

confidence: 99%

Corrosion fatigue in DLC-coated articulating implants: an accelerated methodology to predict realistic interface lifetime

Pardo

Ilic

Thorwarth

et al. 2019

Science and Technology of Advanced Materials

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We present a methodology to accelerate and estimate the lifetime of an interlayer under dynamic loading in body-like media. It is based on accelerating corrosion fatigue processes taking place at the buried interface of a Si-based adhesion-promoting interlayer in articulating implants on a CoCrMo biomedical alloy; the implants are coated with diamond-like carbon (DLC). The number of interface loading cycles to delamination is determined by reciprocal loading in corrosive fluid. Its dependence on the load is summarized in a Wöhler-like curve of a DLC/DLC-Si/CoCrMo system in body working conditions: cyclic stresses at 37°C in phosphate buffered saline (PBS). The presence of oxygen as a contaminant strongly affects the lifetime of the interface under corrosion fatigue. The main parameters acting on the prediction, with a special emphasis on simulated in vivo conditions, are analyzed and discussed: the media (PBS, Milli-Q water, NaCl, Ringers' solution and bovine calf serum), the load, the frequency and the composition of the interface determined by X-ray photoelectron spectroscopy.

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“…The static friction between PEEK wires and brackets was almost the same as that of Ni-Ti wire. For the friction test, EL was employed, in accordance with the previous report [ 26 , 27 ]. SEM revealed no damage of PEEK wires after friction, and the size and shape of PEEK did not influence the static friction.…”

Section: Discussionmentioning

confidence: 99%

“…Measurements of the static friction between the orthodontic wire and the bracket were performed according to previous reports in the system shown in Figure 12 [ 26 , 27 , 34 ]. Each bracket was bonded accurately to the center of a stainless steel plate with unfilled adhesive resin (Superbond Orthomite, Sun Medical, Shiga, Japan) by using the bracket-mounting device shown in Figure 12 b,c.…”

Section: Methodsmentioning

confidence: 99%

Load-Deflection and Friction Properties of PEEK Wires as Alternative Orthodontic Wires

2017

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Polyetheretherketone (PEEK) is now attracting attention as an alternative to metal alloys in the dental field. In the present study, we evaluated the load-deflection characteristics of PEEK wires in addition to their frictional properties. Three types of PEEK wires are used: two sizes of rectangular shape, 0.016 × 0.022 in2 and 0.019 × 0.025 in2 (19-25PEEK), and rounded shape, diameter 0.016 in (16PEEK). As a control, Ni-Ti orthodontic wire, diameter 0.016 in, was used. The three-point bending properties were evaluated in a modified three-point bending system for orthodontics. The static friction between the orthodontic wire and the bracket was also measured. The load-deflection curves were similar among Ni-Ti and PEEK wires, except for 16PEEK with slot-lid ligation. The bending force of 19-25PEEK wire was comparable with that of Ni-Ti wire. 19-25PEEK showed the highest load at the deflection of 1500 μm (p < 0.05) in the case of slot-lid ligation. No significant differences were seen in the permanent deformation between Ni-Ti and all three PEEK wires (p > 0.05). No significant difference was seen in static friction between all three PEEK wires and Ni-Ti wire (p > 0.05). It is suggested that 19-25PEEK will be applicable for orthodontic treatment with the use of slot-lid ligation.

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Relationship between static friction and surface wettability of orthodontic brackets coated with diamond-like carbon (DLC), fluorine- or silicone-doped DLC coatings

Cited by 47 publications

References 34 publications

Evaluation of protein adsorption to diamond-like carbon (DLC) and fluorinedoped DLC films using the quartz crystal microbalance method

Evaluation of protein adsorption to diamond-like carbon (DLC) and fluorinedoped DLC films using the quartz crystal microbalance method

Corrosion fatigue in DLC-coated articulating implants: an accelerated methodology to predict realistic interface lifetime

Load-Deflection and Friction Properties of PEEK Wires as Alternative Orthodontic Wires

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