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Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie

Published in:

01-05-2016 | Original Article

Ceramic brackets and low friction

A possible synergy in patients requiring multiple MRI scanning

Authors: Matteo Camporesi, Mariana Bulhoes Galvão, André Tortamano, Gladys Cristina Dominguez, Nicolò Defraia, Efisio Defraia, Lorenzo Franchi

Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie | Issue 3/2016

Abstract

Aim

To investigate any advantages of low friction biomechanics in orthodontic patients with fixed appliances without producing metal artifacts during magnetic resonance imaging (MRI).

Materials and methods

Frictional resistance generated by bracket–wire–ligature systems was analyzed via an experimental model that reproduced upper canine misalignment. Each sample was tested 10 consecutive times in a dry state; a total of 160 tests were carried out. We documented the frictional forces generated by a 0.012- and 0.014-inch superelastic nickel–titanium wire (SENT) with ceramic self-ligating brackets (SLB) with metal insert and ceramic monocrystalline brackets with nonconventional elastic ligatures (NCEL) in conjunction with various degrees of canine misalignment (1.5, 3.0, 4.5, and 6.0 mm). Comparisons between the frictional forces released by the two different bracket–wire–ligature systems were made by conducting 3-way analysis of variance (ANOVA) with Tukey HSD pairwise test (P < 0.005).

Results

We observed no clinically relevant difference between the frictional forces released by ceramic SLB and ceramic brackets in conjunction with a 0.012- and 0.014-inch SENT. Statistically significant differences were apparent with a 0.012-inch SENT at 4.5 and 6.0 mm of canine misalignment, where the SLB revealed higher frictional forces.

Conclusions

Ceramic brackets with NCEL revealed frictional forces similar to those generated in conjunction with ceramic SLB, thereby helping to avoid metal artifacts in case of expected necessary MRI during orthodontic treatment with fixed appliances.

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Title: Ceramic brackets and low friction
A possible synergy in patients requiring multiple MRI scanning
Authors: Matteo Camporesi
Mariana Bulhoes Galvão
André Tortamano
Gladys Cristina Dominguez
Nicolò Defraia
Efisio Defraia
Lorenzo Franchi
Publication date: 01-05-2016
Publisher: Springer Berlin Heidelberg
Published in: Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie / Issue 3/2016
Print ISSN: 1434-5293
Electronic ISSN: 1615-6714
DOI: https://doi.org/10.1007/s00056-016-0027-3

At a glance: The STEP trials

Springer Medicine

Ceramic brackets and low friction

A possible synergy in patients requiring multiple MRI scanning

Abstract

Aim

Materials and methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Aim

Materials and methods

Results

Conclusions

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