Journal Article

The effect of Teflon coating on the resistance to sliding of orthodontic archwires

Giampietro Farronato, Rolf Maijer, Maria Paola Carìa, Luca Esposito, Dario Alberzoni and Giorgio Cacciatore

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 34, issue 4, pages 410-417
Published in print August 2012 | ISSN: 0141-5387
Published online April 2011 | e-ISSN: 1460-2210 | DOI: http://dx.doi.org/10.1093/ejo/cjr011
The effect of Teflon coating on the resistance to sliding of orthodontic archwires

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Teflon is an anti-adherent and aesthetic material. The aim of this study was to evaluate, in vitro, the influence of Teflon coating on the resistance to sliding (RS) of orthodontic archwires. For this purpose, Teflon-coated archwires were examined using frictional resistance tests by means of a universal testing machine and compared with conventional uncoated wires. Twelve types of archwires with round and rectangular sections (0.014, 0.018, and 0.018 × 0.025 inches) and of different materials (stainless steel and nickel–titanium) were tested with two passive self-ligating brackets (SmartClip™ and Opal®) and one active self-ligating bracket (Quick®). Each archwire–bracket combination was tested 10 times under 8 simulated clinical scenarios. Statistical comparisons were conducted between the uncoated and Teflon-coated archwires using Wilcoxon and Mann–Whitney tests, and linear regression analysis.

For all bracket–archwire combinations, Teflon-coated archwires resulted lower friction than the corresponding uncoated archwires (P < 0.01). The results showed that Teflon coating has the potential to reduce RS of orthodontic archwires.

Journal Article.  2817 words.  Illustrated.

Subjects: Restorative Dentistry and Orthodontics

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