Mechanical properties of multi-force vs. conventional NiTi archwires

Lombardo, Luca; Ceci, Marianna; Mollica, Francesco; Mazzanti, Valentina; Palone, Mario

doi:10.1007/s00056-018-00164-4

Cited by 13 publications

(15 citation statements)

References 24 publications

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“…This is probably due to the minor concentration of Ti in this region (Table 2). We found only one paper in the literature where the mechanical properties of Bio-active™ archwires were investigated [9]. Still, this article used another experimental method (load/deflection test) and does not report hardness and modulus of the archwires.…”

Section: Nanoindentation Resultsmentioning

confidence: 99%

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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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Section: Nanoindentation Resultsmentioning

confidence: 99%

“…On the other hand, the biofilm formation and topographic surface of aesthetic Bio-active TM RC wire [8] and the mechanical properties of as received Bio-active TM archwires [9] have been investigated. However, the abovementioned studies focus on as received archwires, and we did not find information about clinically retrieved such.…”

Section: Introductionmentioning

confidence: 99%

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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“…The closer the slope value is to zero, the more constant the force is (15). From a clinical perspective, such unloading plateau denotes that the wire will apply a light, continuous force to the teeth even though the teeth are moving, and the deflection of the wire is decreasing significantly (16). Therefore, the primary objective of the current study was to evaluate the plateau slope of the tested wires at different conditions.…”

Section: Discussionmentioning

confidence: 99%

“…The results revealed that the resilience of the wires was significantly affected by the intervention. During leveling and aligning, low stiffness wires are preferred since they deliver lighter and more constant forces during arch deactivation (16). Such stiffness is determined by the modulus of elasticity of the wire.…”

Section: Discussionmentioning

confidence: 99%

Mechanical properties and clinical performance of different brands of nickel titanium archwires following intraoral use

Salama

Aboalnaga

Salama

et al. 2022

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Objectives: To evaluate the effect of intraoral use of three brands of nickel titanium archwires on their mechanical properties and crowding relief ability. Methods: Three groups (n=39) of 0.016” round NiTi archwires: Dentaurum (A), American Orthodontics (B) and IMD Orthodontics (C) were subdivided according to the intervention (n=13) into: As-received, no intervention (subgroup 1), in-vivo (subgroup 2), and in-vitro (subgroup 3). Plateau slope, resilience, and elastic modulus of all wires were tested using a universal testing machine. The relief of crowding following intraoral use for 8 weeks was assessed using Little’s irregularity index. Results were significant at p ≤ 0.05. Results: For all NiTi brands, the highest plateau slope value; among the subgroups, was recorded following the intraoral use (in-vivo). For the in-vivo wires (subgroup 2), the Dentaurum wires revealed the lowest plateau slope value (0.258 N/mm ±0.032) while the IMD wires revealed the lowest resilience values (36.24 J.mm-3 ±0.6). There was no significant difference in the modulus of elasticity of wires between all 3 subgroups. The Little’s irregularity index decreased over time, and the difference between the groups was not significant. No significant difference was found between the groups in terms of inter-canine width.

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“…From the research of the orthodontic literature [ 13 , 14 , 15 ], we found that the information is insufficient for the multi-force archwires TriTanium ® and Bio-Active ® , used in clinical orthodontic practice (in-vivo use). When choosing an appropriate archwire for a certain stage of orthodontic treatment with a fixed technique, information about the mechanical properties is of the utmost importance for the practitioners.…”

Section: Introductionmentioning

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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Mechanical properties of multi-force vs. conventional NiTi archwires

Cited by 13 publications

References 24 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

Mechanical properties and clinical performance of different brands of nickel titanium archwires following intraoral use

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

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