Orthodontic wires and its corrosion—The specific case of stainless steel and beta-titanium

Castro, Saúl; Ponces, Maria João; Lopes, Jorge Dias; Vasconcelos, Mário; Pollmann, Maria Cristina Figueiredo

doi:10.1016/j.jds.2014.07.002

Cited by 85 publications

(80 citation statements)

References 44 publications

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“…Cr forms a thin, adherent passivating oxide layer that provides corrosion resistance by blocking the diffusion of oxygen to the underlying alloy. can be soldered and welded for the fabrication of complex appliances [1].…”

Section: Resultsmentioning

confidence: 99%

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Multidisciplinary Approach on the Corrosion Behavior of Welded Nickel-free and Nickel-containing Stainless Steel Orthodontic Wires

Porojan¹,

Bîrdeanu²,

Porojan³

2019

Rev. Chim.

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The oral environment is responsible to the degradation of metal wires, with consequent release of metal ions in the oral cavity during corrosion, and welded joints are known as areas that are particularly susceptible to corrosion. The aim of the study was to achieve the corrosion behavior of welded Ni-free and Ni-containing stainless steel (SS) orthodontic wires. The morphology and the topography of the laser welded samples were investigated by scanning electron microscopy and atomic force microscopy. The electrochemical measurements calculated the values for corrosion potential, corrosion current and corrosion rate, for different pH values. Immersion in acidic solution had minimal effect on the corrosion on the joint regions. Ni-free SS wires proved to have a better corrosion resistance, improved by laser welding. Ni-containing SS wires are positive influenced by laser welding, relative to the corrosion behavior.

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Section: Resultsmentioning

confidence: 99%

“…These rely on the perfect design and condition of orthodontic wires. Nowadays different wires made from different metals and alloys are available [1].…”

mentioning

confidence: 99%

Multidisciplinary Approach on the Corrosion Behavior of Welded Nickel-free and Nickel-containing Stainless Steel Orthodontic Wires

Porojan¹,

Bîrdeanu²,

Porojan³

2019

Rev. Chim.

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“…Allergic, carcinogenic, mutagenic and cytotoxic effects often with nickel and to a lesser extent, chromium. Allergic reactions include edema, mouth lining, and anaphylaxis [3].…”

Section: Introductionmentioning

confidence: 99%

Nickel and Chromium Ion Levels in Hair and Gingival Crevicular Fluid with the Corrosion of Brackets in Orthodontic Patients: A Longitudinal Study

Mudjari

Achmad

Singgih

et al. 2019

Pesqui. bras. odontopediatria clín. integr.

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Objective: To assess the levels of nickel and chromium ions in hair and Gingival Crevicular Fluid (GCF) of orthodontic patients and to evaluate the corrosion of orthodontic bracket surfaces. Material and Methods: Nickel and chromium ion concentrations were measured in hair and GCF of 15 patients (9 females and 6 males, aged 16-28 years old) who had fixed orthodontic treatment using atomic absorption spectroscopy. The samples were taken before treatment (baseline), 4, 8, and 16 months later during treatment. Along with ionic sampling, microscopic sampling was done. One of each patient brackets was removed to get 15 brackets per group. Five brackets were taken randomly from each group to be examined under scanning electron microscope (SEM). Data obtained were analyzed using paired t-tests. Results: After 16 months, compared with the baseline, average hair nickel level changed from 0.125 µg/g to 0.956 µg/g with statistically significant difference (p=0.00); average chromium level changed from 0.090 µg/g to 0.295 µg/g but no significant difference (p>0.05); average GCF nickel level changed from 3.335 µg/g to 10.410 µg/g; average chromium level changed from 1.859 µg/g to 9.818 µg/g. Both of these increases were significant (p=0.000). SEM examinations showed that the corrosion on brackets was seen in the fourth month, and more severely visible after 8 and 16 months of uses. Conclusion: After 16 months of treatment, compared with the baseline, the hair nickel level was increased by 7.7 times; while for chromium was by 3.3 times. Gingival crevicular fluid nickel level was increased by 3.1 times and chromium level was by 5.3 times. The longer time of treatment, the more ions released and the more corrosion of brackets will be.

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“…Clinicians normally adopt standard procedures and bending methods causing problems such as poor correction effect and increasing consultation hours because of the mismatch between individual needs and standardized clinical techniques. Therefore, in terms of diagnosis [3], treatment planning and mechanical therapy, strictly following standardized procedures is not suitable nowadays for personalized precise treatment, which therefore, needs to be improved.…”

Section: Introductionmentioning

confidence: 99%

3D Printing of Personalized Archwire Groove Model for Orthodontics: Design and Implementation

Liu¹,

He²,

Zhen³

et al. 2018

ijacsa

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In traditional dental treatment, archwires are bent by orthodontists using standard methods. However, the standard models cater to patients with common oral problems, and are unsuitable for personalized orthodontic treatment, which is highly desired in many cases. A method to prepare a personalized archwire groove model is, undoubtedly, useful for orthodontic treatment in clinical diagnosis. In this study, a threedimensional (3D) printing technology is demonstrated to achieve the personalized archwire groove model in a rapid, computed tomography image compatible manner, to assist orthodontists. This method is expected to improve the efficiency and accuracy of archwire bending and the resultant product can distribute the uniform dentofacial stress, improve the wearing comfort of the patient and further shorten the period of treatment and repair of the tooth.

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Orthodontic wires and its corrosion—The specific case of stainless steel and beta-titanium

Cited by 85 publications

References 44 publications

Multidisciplinary Approach on the Corrosion Behavior of Welded Nickel-free and Nickel-containing Stainless Steel Orthodontic Wires

Multidisciplinary Approach on the Corrosion Behavior of Welded Nickel-free and Nickel-containing Stainless Steel Orthodontic Wires

Nickel and Chromium Ion Levels in Hair and Gingival Crevicular Fluid with the Corrosion of Brackets in Orthodontic Patients: A Longitudinal Study

3D Printing of Personalized Archwire Groove Model for Orthodontics: Design and Implementation

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