Corrosion Resistance of Stainless Steel Brackets After Thermal Recycling by Direct Flaming

Novianti, Suci; Siregar, Erwin; Anggani, Haru Setyo

doi:10.4034/pboci.2019.191.98

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…Although studies on metal ion release from orthodontic appliances into biological fluids ruled out the possibility of toxic concentrations, even nontoxic levels may cause biological changes in the oral mucosa, such as altered cellular functions, decreased DNA synthesis, and enzyme inhibition. Additionally, orthodontic adhesives must be biocompatible for clinical use in contact with gingival and oral tissues ( 25 , 26 ).…”

Section: Discussionmentioning

confidence: 99%

Quantitative determination and antibacterial properties of TiO2 nanoparticle-doped glass ionomer cement: an in vitro study

Mahendra,

Rahul,

Konathala

et al. 2023

eor

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Purpose: The aim of the present study is to determine the amount of titanium ions released into the artificial salivary medium by modified glass ionomer cement (GIC) doped with 3% and 5% (w/w) titanium dioxide nanoparticles (TiO2-NPs), and to evaluate their antibacterial properties. Materials and methods: 120 cylindrical discs with a diameter of 4 mm and a height of 6 mm were made with 3% and 5% w/w modified GIC containing TiO2 NPs, divided into two groups of 60, and immersed in a chemically synthesized salivary medium. The samples were quantified over four-time periods: 24 hours, two months, four months, and six months, using inductively coupled plasma mass spectroscopy (ICP-MS), antibacterial properties were evaluated by means of colony forming count (CFU) method. Results: The amount of titanium ions released from the discs that received 3%(w/w) TiO2 was highest in the first two months, with no significant release at successive intervals. Also, the second group, which included 5% (w/w) TiO2, saw a considerable ion release at every interval, with the second month seeing the maximum release. The levels in the 5% (w/w) group were consistently higher when the two concentrations were compared at each of the four time points, indicating a considerable increase in titanium release and antibacterial property with a concentration increase from 3% to 5%. Conclusion: 3% and 5% (w/w) concentrations may be considered safe and exhibit significant antimicrobial effect, titanium ions were discharged at higher rates in 5% (w/w) modified GIC containing TiO2-NPs than in 3% (w/w) modified GIC containing TiO2-NPs.

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Section: Discussionmentioning

confidence: 99%

Quantitative determination and antibacterial properties of TiO2 nanoparticle-doped glass ionomer cement: an in vitro study

Mahendra,

Rahul,

Konathala

et al. 2023

eor

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Release of nickel and chromium ions from stainless steel brackets as a result of long-term exposure to commonly used toothpaste

Kriswandini,

Bagus

2024

IJDM

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Background: Brackets in fixed orthodontic appliances are mostly made from metal or stainless steel. Maintaining oral hygiene by brushing the teeth with toothpaste during orthodontic treatment is important. One of the ingredients in toothpaste, sodium fluoride, can cause degradation of the stainless-steel surface, which has the potential to corrode or release metal elements. Purpose: the purpose of this study is to describe the Nickel and chromium ion release of stainless-steel brackets against toothpaste use in orthodontic treatment by means of narrative review. Review: The main corrosion products of stainless-steel brackets are nickel and chromium. Toothpaste detergents contain sodium lauryl sulfate, which can cause the release of nickel ions due to the presence of sodium ions, which can trigger redox reactions. In addition, the fluoride content will combine with hydrogen to produce hydrofluoric acid, which can damage the oxide layer on orthodontic wires, resulting in the release of metal ions such as nickel and chromium. The effects of the release of these ions can be carcinogenic, cause hypersensitivity reactions, and cause cytotoxicity. Corrosion causes the dissolution of filler metal, resulting in weakened bracket material and increased friction, leading to delayed tooth movement. Conclusion: Toothpaste can affect the release of nickel and chromium ions in stainless steel brackets in the presence of sodium and fluoride.

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Effects of Different Adhesive Systems and Orthodontic Bracket Material on Enamel Surface Discoloration: An In Vitro Study

et al. 2022

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The aim of this in vitro study was to assess the effect of the type of orthodontic brackets and adhesive systems on enamel discoloration. The baseline color of the buccal surfaces of 50 extracted human premolars was recorded using a spectrophotometer according to the CIE Lab system. The teeth were randomly divided into five groups according to the bracket type and adhesive system used: Group A: metal brackets + a Three-step etch and rinse adhesive (E&R); Group B: metal brackets + a two-step self-adhesive adhesive (SE); Group C: ceramic brackets + (E&R); Group D: ceramic brackets + (SE); Group E: no bracket bonding, serving as a control. All teeth were thermocycled, the brackets were debonded, and the enamel surfaces were finished and polished. The tooth color was then re-assessed, and the change in color (∆E*) was calculated. Pairwise comparisons revealed significant differences in favor of ceramic brackets (ΔE = 3.77 ± 3.60; p = 0.009) and (E&R) (ΔE= 3.52 ± 2.45; p = 0.008). A significant difference was found among the different groups, with group C having the least change in color (ΔE = 2.00 ± 0.89) and group B having the highest (ΔE = 8.42 ± 5.66). Both the type of orthodontic bracket and adhesive system influenced tooth color change. The teeth bonded with ceramic and E&R had the least effect on color changes, whereas teeth bonded with metal and SE showed the highest color changes after debonding.

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Corrosion Resistance of Stainless Steel Brackets After Thermal Recycling by Direct Flaming

Cited by 3 publications

References 5 publications

Quantitative determination and antibacterial properties of TiO2 nanoparticle-doped glass ionomer cement: an in vitro study

Quantitative determination and antibacterial properties of TiO2 nanoparticle-doped glass ionomer cement: an in vitro study

Release of nickel and chromium ions from stainless steel brackets as a result of long-term exposure to commonly used toothpaste

Effects of Different Adhesive Systems and Orthodontic Bracket Material on Enamel Surface Discoloration: An In Vitro Study

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