Mechanical properties of beta-titanium wires

Gurgel, Júlio de Araújo; Pinzan-Vercelino, Célia Regina Maio; Powers, John M.

doi:10.2319/070510-379.1

Cited by 25 publications

(19 citation statements)

References 24 publications

(30 reference statements)

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“…After securing each wire specimen, the acrylic rod was attached to the support utilized for the deflection test. Loading was achieved through movement of a metal loading device adapted on a universal mechanical testing machine (Emic, DL 2000, São José dos Pinhais, Brazil) with a 5-kg load cell and a crosshead speed of 0.5 mm/min [12]. …”

Section: Methodsmentioning

confidence: 99%

“…It is considered the most important clinical parameter because it closely affects the biological nature of dental movement [11]. Various studies [2-4,11,12] have evaluated orthodontic wires in laboratorial in vitro tests during deflection tests, in order to assess their load/deflection behavior and their elasticity module. All these studies used a set up where the brackets where dimensionally leveled and aligned.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of mechanical properties of beta-titanium wires between leveled and unleveled brackets: an in vitro study

et al. 2014

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BackgroundThe objective of this study is to evaluate the force-deflection behavior of beta-titanium alloy wires between two leveled and unleveled bracket alignment scenarios using a three-point bending test.MethodsSix groups of ten beta-titanium alloy wire segments (0.017 × 0.025-in. diameter) of different manufacturers (Orthometric, Ortho Organizers, GAC, Morelli, and Ormco) were used. Both brackets were bonded to an acrylic jig with a 10-mm interbracket distance. A 1-mm deflection test in two hypothetical conditions (with aligned brackets and by simulating a 2-mm horizontal displacement of the brackets) was explored. Forces of activation and deactivation of the wires during both tests were compared by an analysis of variance (ANOVA) tests followed by a Tukey test.ResultsA statistically significant difference was found in the force-deflection behavior between some of the wires in both simulated in vitro conditions. For the leveled-type alignment scenario, the differences between wires were up to 70 g (range 110 to 179 g). For the unleveled-type alignment scenario, these differences were up to 65 g (range 111 to 175 g).ConclusionsThe study showed some significant differences in forces generated during activation and deactivation among the five types of beta-titanium wires tested. In comparing leveled and unleveled brackets during activation, only Orthometric Beta Flexy and Ormco Beta-titanium were different between them.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of mechanical properties of beta-titanium wires between leveled and unleveled brackets: an in vitro study

et al. 2014

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“…In the 1960s, the US Navy created a revolutionary ‘shape-memory’ alloy, Nitinol, which is 20% more elastic than conventional steel and has a much broader field of action. This was followed, in 1980, by the Ormco Corporations launch of beta-titanium (TMA) archwires, made of a formable alloy of elasticity between steel and nickel titanium (NiTi) [9]. …”

Section: Introductionmentioning

confidence: 99%

Torque expression capacity of 0.018 and 0.022 bracket slots by changing archwire material and cross section

et al. 2014

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Background: The aim of this study is to calculate and compare the play and torque expression of 0.018 and 0.022 bracket slots when engaged with archwires of different size, cross section and material. Methods: Eight orthodontic brackets, two of slot height 0.018 and six of slot height 0.022, from different manufacturers, were measured and fixed to a vertical support. Twenty-four archwires of differing size, cross section and material were selected, measured and tested in each bracket of compatible slot width. Compression testing by Instron dynamometer and geometric calculations enabled us to determine the play angle of each bracket/archwire combination, and the angle at which a clinically efficacious force couple, sufficient for dental movement, is exerted.

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“…(3) Various studies (4,5,6) have evaluated orthodontic wires in laboratorial in vitro tests during deflection tests, in order to assess their load/deflection behaviour and their elasticity module. Although many authors (7,8,9) have investigated the properties of arch wires, most published studies have tended to concentrate on evaluating properties of various wires at specific deflections and have considered their complete behaviour on loading and unloading in a levelled brackets. In order to simulate a better clinical situation, 2-mm horizontal displacement was done between the brackets and will be tested to evaluate if the load/deflection behaviour changes.…”

Section: Introductionmentioning

confidence: 99%

Comparison of mechanical properties of three orthodontic wires between levelled and unlevelled brackets: An in vitro study

2016

IJODR

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Background:The objective of this study was to compare the mechanical properties of three orthodontic wires between levelled and unlevelled bracket using a three-point bending test. Methods: Three groups of ten Nickel titanium, Betatitanium and CuNiTi wire segments (0.017 × 0.025-in. diameter) were used. Two brackets were bonded to an acrylic jig with a 10-mm interbracket distance. Deflection test was done in two scenarios, one with aligned brackets and other with 2-mm horizontal displacement of the brackets to simulate malaligned teeth. Forces of loading and unloading of the wires during both tests were compared by an analysis of variance (ANOVA) tests. Results: The difference of LDR between levelled and unlevelled brackets during loading in NiTi wire was 0.1 N, Beta-titanium wire 0.2 N and CuNiTi wire was 1.5 N. The difference of LDR between levelled and unlevelled brackets during unloading in NiTi wire was 0.2 N, Betatitanium wire was 0.3 N and CuNiTi wire is 0.5 N. Conclusions:The study showed some significant differences in forces generated during loading and unloading among the three different types of wires tested. During both the scenarios only CuNiTi wire showed significant difference. Betatitanium wire exhibited highest force followed by NiTi and CuNiTi.

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Mechanical properties of beta-titanium wires

Cited by 25 publications

References 24 publications

Comparison of mechanical properties of beta-titanium wires between leveled and unleveled brackets: an in vitro study

Comparison of mechanical properties of beta-titanium wires between leveled and unleveled brackets: an in vitro study

Torque expression capacity of 0.018 and 0.022 bracket slots by changing archwire material and cross section

Comparison of mechanical properties of three orthodontic wires between levelled and unlevelled brackets: An in vitro study

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