Frictional coefficients of ion-implanted alumina against ion-implanted beta-titanium in the low load, low velocity, single pass regime

Kusy, Robert P.; Tobin, Eric; Whitley, Julia; Sioshansi, P.

doi:10.1016/0109-5641(92)90076-o

Cited by 50 publications

(31 citation statements)

References 14 publications

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“…However, the use of such rigid heavy wire leads to the problem of increased friction between the wire and the brackets 4,[7][8][9] . There have been many studies on the reduction of friction between brackets and wire 2,4,[10][11][12][13][14][15][16][17] . These mainly involved the use of self-ligating brackets or deceasing the contact area between the brackets and the wire 4,6,14,17) .…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, when rigid heavy wire is used at high angulation, the friction between the brackets and the wire is comparable to that for conventional brackets 2) . There have some studies on reducing the friction between brackets and wire using surface treatments such as ion implantation, poly(tetrafluoroethylene) coating, and polyethylene coating of the wires and/or brackets [10][11][12][13] . Diamond-like carbon (DLC) coatings have recently been applied in many industrial applications because they confer excellent properties such as extreme surface hardness, low friction coefficients, chemical inertness, high wear resistance, and good biocompatibility [18][19][20] .…”

Section: Introductionmentioning

confidence: 99%

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Reduction in static friction by deposition of a homogeneous diamond-like carbon (DLC) coating on orthodontic brackets

et al. 2015

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In orthodontics, a reduction in static friction between the brackets and wire is important to enable easy tooth movement. The aim of this study was to examine the effects of a homogeneous diamond-like carbon (DLC) coating on the whole surfaces of slots in stainless steel orthodontic brackets on reducing the static friction between the brackets and the wire. The DLC coating was characterized using Raman spectroscopy, surface roughness and contact angle measurements, and SEM observations. Rectangular stainless steel and titanium-molybdenum alloy wires with two different sizes were employed, and the static friction between the brackets and wire was measured under dry and wet conditions. The DLC coating had a thickness of approximately 1.0 μm and an amorphous structure was identified. The results indicated that the DLC coating always led to a reduction in static friction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reduction in static friction by deposition of a homogeneous diamond-like carbon (DLC) coating on orthodontic brackets

et al. 2015

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“…If the frictional force can be decreased, then the efficiency of tooth movement can be improved [37,38]. The frictional properties are attributed to multiple factors, such as surface roughness, hardness, elastic modulus, and the cross-sectional dimensions of the orthodontic wires and brackets [37,38]. A recent study reported that commercially available esthetic coating wire influences the frictional properties [15] and the esthetic polymer coating may increase the frictional resistance due to increased wire-binding at the edge of the bracket.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Electrophoretic Deposition as a New Bioactive Glass Coating Process for Orthodontic Stainless Steel

et al. 2017

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This study investigated the surface modification of orthodontic stainless steel using electrophoretic deposition (EPD) of bioactive glass (BG). The BG coatings were characterized by spectrophotometry, scanning electron microscopy with energy dispersive X-ray spectrometry, and X-ray diffraction. The frictional properties were investigated using a progressive load scratch test. The remineralization ability of the etched dental enamel was studied according to the time-dependent mechanical properties of the enamel using a nano-indentation test. The EPD process using alternating current produced higher values in both reflectance and lightness. Additionally, the BG coating was thinner than that prepared using direct current, and was completely amorphous. All of the BG coatings displayed good interfacial adhesion, and Si and O were the major components. Most BG-coated specimens produced slightly higher frictional forces compared with non-coated specimens. The hardness and elastic modulus of etched enamel specimens immersed with most BG-coated specimens recovered significantly with increasing immersion time compared with the non-coated specimen, and significant acid-neutralization was observed for the BG-coated specimens. The surface modification technique using EPD and BG coating on orthodontic stainless steel may assist the development of new non-cytotoxic orthodontic metallic appliances having satisfactory appearance and remineralization ability.

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“…Several investigators have studied the causes and effects of resistance to sliding in the passive configuration as a function of wire alloy, bracket material, surface modification and roughness, and wet and dry states. 1,[7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] As the angulation between the bracket and the archwire increases, the clearance between the archwire and the bracket slot disappears, and an interference fit occurs. Therefore, binding arises as a second component of resistance to sliding.…”

Section: S Liding Mechanics Are Commonly Used In Ortho-mentioning

confidence: 99%

Three-dimensional relationship between the critical contact angle and the torque angle

Kang¹,

Baek²,

Mah³

et al. 2003

American Journal of Orthodontics and Dentofacial Orthopedics

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The purpose of this study was to analyze the relationship between the critical contact angle and the torque angle in an orthodontic bracket and archwire assembly in 3 dimensions. Three-dimensional mathematical models were created with geometric bracket-archwire parameters that included 2 slot sizes, 3 bracket widths, and 3 to 4 wire sizes. From this, 3-dimensional mathematical equations (3DMEs) for the critical contact angle and the maximum torque that result in critical contact angles of 0 were derived and calculated. To evaluate the effects of archwire-bracket parameters on critical contact angles, analysis of variance (ANOVA) was performed at the significance level of P Յ .05. For all bracket-archwire combinations, the critical contact angle decreased as bracket width, torque angle, and wire size increased. Therefore, all bracket-archwire parameters except slot height had an effect on the critical contact angle. Results of the critical contact angle produced from our 3DMEs were the same as those produced by 3D computer-aided design (SolidWorks Corp, Concord, Mass), thus confirming the validity of our derived equations. In addition, the effect of a beveled edge was investigated in some archwires. Furthermore, torsional play angles were calculated and found to be similar to those in previous reports. The results of this study provide theoretic and experimental bases for clinical orthodontic practice and indicate that torque angles should be included in the evaluation of the critical contact angle. (Am J Orthod Dentofacial Orthop 2003;123:64-73)

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Frictional coefficients of ion-implanted alumina against ion-implanted beta-titanium in the low load, low velocity, single pass regime

Cited by 50 publications

References 14 publications

Reduction in static friction by deposition of a homogeneous diamond-like carbon (DLC) coating on orthodontic brackets

Reduction in static friction by deposition of a homogeneous diamond-like carbon (DLC) coating on orthodontic brackets

Electrophoretic Deposition as a New Bioactive Glass Coating Process for Orthodontic Stainless Steel

Three-dimensional relationship between the critical contact angle and the torque angle

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