Decorative Finishes on Titanium

Cotton, J.B.; Hayfield, P. C. S.

doi:10.1080/00202967.1967.11870018

Cited by 20 publications

(3 citation statements)

References 1 publication

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“…On the other hand, brackets immersed in the other test solutions showed only a slight color change after three days. A specific color change is brought on when the surface oxide layer attains a certain thickness 14,15) . In the context of the present study, change in oxide layer thickness is attributable to the HF formed, whereas oxidation of bracket is attributable to the oxygen penetrating the surface.…”

Section: Discussionmentioning

confidence: 99%

Effect of Acetic NaF Solution on the Corrosion Behavior of Stainless Steel Orthodontic Brackets

et al. 2006

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This study assessed the effect of acetic NaF solutions on stainless steel orthodontic brackets. Acetic acid was added to a 0.1％ NaF solution to make two solutions, one with pH 3.5 and the other with pH 6. For the two different stainless steel brackets（Tomy, Dentaurum）used in this study, they had a similar elemental composition -except with Mo（molybdenum） in the Tomy bracket. The brackets were then immersed in the prepared test solutions for three days and their responses evaluated. In terms of hydrofluoric acid（HF）concentration, the 0.1％/pH 3.5 solution showed a high HF concentration at 227 ppm, while that of 0.1％/pH 6 solution was very low at 7 ppm. In terms of color change and element release, only the Dentaurum brackets in 0.1％/pH 3.5 solution showed an appreciable color change（ΔE ＊＝4.0）and released a great amount of elements（Fe, Cr, Ni, Mn）after three days. Otherwise, regardless of pH value and product, only minor color change （ΔE ＊＜1.0）and negligible element release occurred. In terms of surface modification, no visible changes in surface morphology were observed in any product after immersion in test solutions.

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Section: Discussionmentioning

confidence: 99%

Effect of Acetic NaF Solution on the Corrosion Behavior of Stainless Steel Orthodontic Brackets

et al. 2006

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“…[10,126,127] In the 1960s, the operating conditions for achieving determined colour hues had already been specified for anodising in diluted phosphoric and sulphuric acid, and an 'instant colour writing' was developed by using a platinum or lead wire À sheathed in a glass tube and functioning as a counterelectrode À as a pencil on a titanium sheet. [128] Chromatic effects could also be localised by screening a part of the surface and subjecting the remaining part to oxidation; furthermore, the invisible aspects of certain physical or chemical phenomena were brought to light on titanium À the so-called 'appearances' À concerning phenomena that had either already taken place (field appearances) or that were taking place (movement appearances) during image formation on the surface, as described and realised by Pedeferri [129]:…”

Section: Thicknessmentioning

confidence: 99%

Application-wise nanostructuring of anodic films on titanium: a review

Diamanti

Ormellese

Pedeferri

2015

Journal of Experimental Nanoscience

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“…The color of titanium can be determined by either the oxidation of titanium or the reduction of its oxide layer such that any specific color will be produced when the oxide layer reaches a certain thickness. 25,26 The reduction of the oxide layer is attributable to the formed HF, whereas the oxidation of titanium is attributable to the oxygen penetrating from the surface. According to the report, the presence of fluoride at the surface accelerated oxide growth.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the effect of fluoride‐containing acetic acid on NiTi wires

Kwon¹,

Cho²,

Noh³

et al. 2004

J Biomed Mater Res

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The possibility of the formation of hydrofluoric acid by the reaction of fluoride with acetic acid seems natural in the oral cavity. The effect of an acidic fluoride solution on NiTi wires was investigated by testing microhardness and color changes on wires. For aesthetic reasons, the color change on wires was also evaluated. Wires were immersed in four different test solutions for 1 or 3 days. As-received wires were used as a reference. After immersion for 3 days, the microhardness of the tested wires increased 1.8% to 10.4% compared to that of their as-received state. Wires immersed in a higher NaF concentration, lower pH solution with longer immersion yielded a more corroded surface than those of the counter cases. Wires showed a different color after immersion. However, after 3 days in solutions of pH 4, wires showed an appreciable color change regardless of the products. In test solutions, 3M wires showed the highest volumetric and percentage (0.59 for 0.05%; 1.19 for 0.2% solution) weight loss and G&H wires showed the least volumetric and percentage (0.43 for 0.05%; 1.05 for 0.2% solution) weight loss among tested wires. In pH 6 solutions, wires lost weight and were under the detection limit of the testing machine.

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Decorative Finishes on Titanium

Cited by 20 publications

References 1 publication

Effect of Acetic NaF Solution on the Corrosion Behavior of Stainless Steel Orthodontic Brackets

Effect of Acetic NaF Solution on the Corrosion Behavior of Stainless Steel Orthodontic Brackets

Application-wise nanostructuring of anodic films on titanium: a review

Evaluation of the effect of fluoride‐containing acetic acid on NiTi wires

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