Torque Efficiency of Square and Rectangular Archwires into 0.018 and 0.022 In. Conventional Brackets

Overview

Journal Prog Orthod

Publisher Springer

Specialty Dentistry

Date 2016 Jan 19

PMID 26780465

Citations 14

Authors

Spyridon N Papageorgiou

Iosif Sifakakis

Ioannis Doulis

Theodore Eliades

Christoph Bourauel

Affiliations

Soon will be listed here.

Abstract

Background: The aim of this study was to compare the torque efficacy of square and rectangular wires in 0.018- and 0.022-in. conventionally ligated brackets.

Methods: Brackets of the same prescription were evaluated in both slot dimensions. Identical acrylic resin models of the maxilla were bonded with the brackets and mounted on the Orthodontic Measurement and Simulation System. Ten 0.018 × 0.018 in., 0.018 × 0.022 in., and 0.018 × 0.025 in. stainless steel wires were evaluated in the 0.018-in. brackets and ten 0.019 × 0.019 in., 0.019 × 0.025 in., and 0.019 × 0.026 in. stainless steel wires were evaluated in the 0.022-in. brackets. A 15° buccal root torque was gradually applied to the right central incisor bracket, and the moments were recorded at this position. One-way ANOVA was applied for both bracket slot sizes along with post hoc analysis for the various archwire sizes.

Results: The mean measured moments varied between 10.78 and 30.60 Nmm among the assessed wire-and-bracket combinations. Both square and rectangular archwires in the 0.018-in. bracket system exerted statistically significantly higher moments in comparison with their counterparts in the 0.022-in. bracket system. Rectangular archwires exerted statistically significantly higher moments than square archwires, both for the 0.018- and the 0.022-in. bracket system.

Conclusions: Rectangular archwires seem to be more efficient in torque exertion, especially in 0.018-in. brackets.

Citing Articles

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Comparative Analysis of Displacements and Stress Produced by Square and Rectangular Bracket Slot With Incremental Torque: A Finite Element Analysis Study.

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Comparing Torque Transmission of Different Bracket Systems in Combination with Various Archwires Considering Play in the Bracket Slot: An In Vitro Study.

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PMID: 38591559 PMC: 10856117. DOI: 10.3390/ma17030684.

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