A comparison of torque expression between stainless steel, titanium molybdenum alloy, and copper nickel titanium wires in metallic self-ligating brackets

Archambault, Amy; Major, Thomas W.; Carey, Jason P.; Heo, Giseon; Badawi, Hisham; Major, Paul W.

doi:10.2319/102809-604.1

Cited by 60 publications

(42 citation statements)

References 12 publications

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“…2016; 11(2):e5967. (28)(29)(30)(31)(32)(33)(34), none of the studies took into account the curved section of the arch as simulation models were done using straight pieces of wire. In the absence of in-vivo studies, extrapolating, the result so obtained, to various clinical settings may not be accurate for any given bracket and archwire combination.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Torquing Ability of 0.019” × 0.025” Nickel Titanium and Fiber Composite Archwires -A Cone Beam Computed Tomography Study

Singh¹,

Singh²,

Kannan³

et al. 2016

Iran J Ortho

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Section: Discussionmentioning

confidence: 99%

Comparison of Torquing Ability of 0.019” × 0.025” Nickel Titanium and Fiber Composite Archwires -A Cone Beam Computed Tomography Study

Singh¹,

Singh²,

Kannan³

et al. 2016

Iran J Ortho

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“…Therefore, optimal treatment outcomes require effective torque expression, which is sensitive to irregularities in tooth anatomy, the size, morphology, and engagement of the archwire in the bracket, as well as the position, material properties, and slot size of the bracket (11)(12)(13)(14)(15)(16)(17). For example, although 0.22-inch brackets might be outperform 0.018-inch in some clinical aspects like sliding mechanics, they are inferior in torque expression (18,19).…”

Section: Introductionmentioning

confidence: 99%

Torque differences according to tooth morphology and bracket placement: a finite element study

Papageorgiou

Sifakakis

Keilig

et al. 2016

EORTHO

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INTRODUCTION Torque of the maxillary incisors is essential in esthetics and proper occlusion, while torque expression is influenced by many factors. The aim of this finite element study was to assess the relative effect of tooth morphology, bracket prescription, and bracket positioning on tooth displacement and developed stresses/strains after torque application. METHODS A three-dimensional upper right central incisor with its periodontal ligament (PDL) and alveolus was modelled. The tooth varied in the crown-root angle (CRA) between 156°, 170°, and 184°. An 0.018-inch slot discovery® (Dentaurum, Ispringen, Germany) bracket with a rectangular 0.018 × 0.025-inch -titanium wire was modelled. Bracket torque prescription varied between 0°, 12°, and 22°, with bracket placement at the centre of the middle, gingival or incisal third of the crown. A total of 27 models were generated and a buccal root torque of 30°was applied. Afterwards, crown and apex displacement, strains in the PDL, and stresses in the bracket were calculated and analysed statistically. RESULTS The palatal crown displacement was significantly affected by bracket positioning (up to 94 per cent), while the buccal apex displacement was significantly affected by bracket prescription (up to 42 per cent) and bracket positioning (up to 23 per cent). Strains in the PDL were affected mainly by CRA (up to 54 per cent), followed by bracket positioning (up to 45 per cent). Finally, bracket prescription considerably affected the stresses in the bracket (up to 144 per cent). LIMITATIONS These in silico results need to be validated in vivo before they can be clinically extrapolated. CONCLUSION Tooth anatomy and the characteristics of the orthodontic appliance should be considered during torque application.

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“…The response variables in the research were: torques of the mentioned teeth (13,23,14,24,15,25,16,26) and widths between pairs of teeth of the same kind (canines, first premolars, second premolars and first molars), measured before and after the treatment (T0 and T1).…”

Section: Discussionmentioning

confidence: 99%

“…As Zachrisson [6] said, torque control is one of the weaknesses of the preadjusted bracket systems [6]. And, as many authors have suggested, the expression of torque is the result of interaction of many factors [9,11,24]. In this research, variables, such as individual biological variation, the deformation of the slot of the bracket during treatment, the amount of resin between the bracket base and the tooth, possible defects in wires and brackets or the starting torque of the posterior teeth, could not be controlled.…”

Section: Analysis Of T0 To T1 Changes In Torque According To the Techmentioning

confidence: 99%

Study of the Relationship of Smile Esthetics Between Torque and Dental Arch Width of Posterior Teeth in Orthodontics

Carolin¹,

Zamora²,

Paredes³

et al. 2015

Issues in Contemporary Orthodontics

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A comparison of torque expression between stainless steel, titanium molybdenum alloy, and copper nickel titanium wires in metallic self-ligating brackets

Abstract: Stainless steel has the largest torque expression, followed by TMA and then NiTi.

Cited by 60 publications

References 12 publications

Comparison of Torquing Ability of 0.019” × 0.025” Nickel Titanium and Fiber Composite Archwires -A Cone Beam Computed Tomography Study

Comparison of Torquing Ability of 0.019” × 0.025” Nickel Titanium and Fiber Composite Archwires -A Cone Beam Computed Tomography Study

Torque differences according to tooth morphology and bracket placement: a finite element study

Study of the Relationship of Smile Esthetics Between Torque and Dental Arch Width of Posterior Teeth in Orthodontics

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