Modelling of nickel release dynamics for three types of nickel-titan orthodontic wires

Petrov, Valeri; Andreeva, Laura; Petkov, George; Gueorguieva, Mirella; Stoyanova-Ivanova, Angelina; Kalitzin, Stiliyan

doi:10.1145/3309772.3309792

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…This can be explained as nickel being slowly absorbed into the patient's organism. A similar trend has been reported previously for other heat-activated Ni-Ti orthodontic wires [28].…”

Section: Statistical Analysis Of the Chemical Ni/ti Content Dynamicssupporting

confidence: 90%

Characterization and comparison of as received and clinically retrieved Bio-active™ orthodontic archwires

Georgieva

Stoyanova-Ivanova

Cherneva

et al. 2021

Biotechnology & Biotechnological Equipment

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This study aimed to characterize and compare the latest generation multi-force Bio-active™ orthodontic archwires to determine if there is a change in their physicochemical and mechanical properties during orthodontic treatment. The physicochemical characterization of the archwires was done by X-ray diffraction (XRD), scanning electron microscopy, energy-dispersive X-ray spectroscopy and laser-induced breakdown spectroscopy. A modified dynamic nanoindentation method with depth control was used to determine the mechanical properties. Statistical analysis was done by one-way analysis of variance (ANOVA). The XRD analysis showed that all investigated archwires are made of Ni-Ti alloy with an austenite crystal structure. The surface roughness of the Bio-active™ wires decreases after clinical use. The elemental composition analysis showed that the weight percentage of nickel and titanium is approximately 55 wt.% and 45 wt.%, respectively, and traces of Fe and Cr were registered in some regions. The results from nanoindentation experiments showed that the indentation hardness in the bicuspid part of archwires used for six weeks decreases by about 154%, and the indentation modulus decreases by about 44% compared to as received archwires, probably due to the changes in the morphology. Statistically significant differences in the chemical content are found for the anterior and bicuspid regions, while in the mechanical properties, for the bicuspid and posterior regions of the investigated archwires. The obtained results give orthodontists important information about the physicochemical and mechanical properties of the Bio-active™ multi-force archwires during their clinical use.

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“…This can be explained as nickel being slowly absorbed into the patient's organism. A similar trend has been reported previously for other heat-activated Ni-Ti orthodontic wires [28].…”

Section: Statistical Analysis Of the Chemical Ni/ti Content Dynamicssupporting

confidence: 90%

Characterization and comparison of as received and clinically retrieved Bio-active™ orthodontic archwires

Georgieva

Stoyanova-Ivanova

Cherneva

et al. 2021

Biotechnology & Biotechnological Equipment

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“…Measurements for Nickel ions content were made in pores with very probable corrosion processes. A study [ 26 ] conducted on the dynamics of nickel content (NC), after different periods of intraoral use of archwires (Ni-Ti, heat-activated Ni-Ti and Cu-Ni-Ti), found that there are statistically significant differences. Ni-Ti and heat-activated Ni-Ti, after the first six to seven weeks of use, the NC significantly decreases.…”

Section: Discussionmentioning

confidence: 99%

Effects of Clinical Use on the Mechanical Properties of Bio-Active® (BA) and TriTanium® (TR) Multiforce Nickel-Titanium Orthodontic Archwires

et al. 2023

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Multiforce orthodontic archwires are thermodynamic wires made of nickel-titanium alloy (Ni-Ti). They release biologically tolerable forces along their length, progressively increasing from front to back. The frontal archwires’ segments distribute the weakest force: the premolar, the greater, and the molar, the greatest. The aim of the present study was to determine the influence of clinical use on the mechanical properties of two types of multi-force orthodontic archwires (TriTanium®, American orthodontics; Bio-Active®, GC) with dimensions of 0.016 × 0.022 inches for periods of up to 8 weeks and over 8 weeks of in-vivo use. A three-point bending test was used, and the data gained is statistically analyzed through a multi-variance comparison Mann-Whitney test. We found that after uses of up to 8 weeks and over 8 weeks, the shape memory effect and superelasticity are preserved, as well as the tendency for differential force release along the length of the archwires is kept.

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Modelling of nickel release dynamics for three types of nickel-titan orthodontic wires

Cited by 2 publications

References 6 publications

Characterization and comparison of as received and clinically retrieved Bio-active™ orthodontic archwires

Characterization and comparison of as received and clinically retrieved Bio-active™ orthodontic archwires

Effects of Clinical Use on the Mechanical Properties of Bio-Active® (BA) and TriTanium® (TR) Multiforce Nickel-Titanium Orthodontic Archwires

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