Journal Article

An <i>in vitro</i> investigation of the influence of self-ligating brackets, low friction ligatures, and archwire on frictional resistance

Simona Tecco, Donato Di Iorio, Giancarlo Cordasco, Italia Verrocchi and Felice Festa

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 29, issue 4, pages 390-397
Published in print August 2007 | ISSN: 0141-5387
Published online August 2007 | e-ISSN: 1460-2210 | DOI: https://dx.doi.org/10.1093/ejo/cjm007
An in vitro investigation of the influence of self-ligating brackets, low friction ligatures, and archwire on frictional resistance

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This study, performed using a specially designed apparatus that included 10 aligned brackets, evaluated the frictional resistance generated by conventional stainless steel (SS) brackets (Victory Series), self-ligating Damon SL II brackets, Time Plus brackets, and low-friction ligatures (Slide) coupled with various SS, nickel-titanium (NiTi), and beta-titanium (TMA) archwires. All brackets had a 0.022-inch slot and the orthodontic wire alloys were 0.016, 0.016 × 0.022, and 0.019 × 0.025 inch NiTi, 0.017 × 0.025 inch TMA, and 0.019 × 0.025 inch SS. Each bracket–archwire combination was tested 10 times.

Coupled with 0.016 inch NiTi, Victory brackets generated the most friction and Damon SL II the least (P < 0.001); with 0.016 × 0.022 inch NiTi, the self-ligating brackets (Time and Damon SL II) generated significantly lower friction (P < 0.001) than Victory Series and Slide ligatures; with 0.019 × 0.025 inch SS or 0.019 × 0.025 inch NiTi, Slide ligatures generated significantly lower friction than all other groups. No difference was observed among the four groups when used with a 0.017 × 0.025-inch TMA archwire.

These findings suggest that the use of an in vitro testing model that includes 10 brackets provides information about the frictional force of the various bracket–archwire combinations.

Journal Article.  4595 words.  Illustrated.

Subjects: Restorative Dentistry and Orthodontics

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