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Biomedical Engineering / Biomedizinische Technik

Joint Journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering and the German Society of Biomaterials

Editor-in-Chief: Dössel, Olaf

Editorial Board: Augat, Peter / Habibović, Pamela / Haueisen, Jens / Jahnen-Dechent, Wilhelm / Jockenhoevel, Stefan / Knaup-Gregori, Petra / Lenarz, Thomas / Leonhardt, Steffen / Plank, Gernot / Radermacher, Klaus M. / Schkommodau, Erik / Stieglitz, Thomas / Boenick, Ulrich / Jaramaz, Branislav / Kraft, Marc / Lenthe, Harry / Lo, Benny / Mainardi, Luca / Micera, Silvestro / Penzel, Thomas / Robitzki, Andrea A. / Schaeffter, Tobias / Snedeker, Jess G. / Sörnmo, Leif / Sugano, Nobuhiko / Werner, Jürgen /

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Volume 62, Issue 1

Issues

Volume 57 (2012)

Elemental, microstructural, and mechanical characterization of high gold orthodontic brackets after intraoral aging

Sepp Hersche
  • Clinic of Orthodontics and Paediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, 8032, Switzerland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Iosif Sifakakis / Spiros Zinelis
  • Clinic of Orthodontics and Paediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, 8032, Switzerland
  • Department of Biomaterials, School of Dentistry, National and Kapodistrian, University of Athens, Athens, 11527, Greece
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Theodore Eliades
  • Corresponding author
  • Clinic of Orthodontics and Paediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, 8032, Switzerland
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2016-04-06 | DOI: https://doi.org/10.1515/bmt-2015-0205

Abstract

The purpose of the present study was to investigate the elemental composition, the microstructure, and the selected mechanical properties of high gold orthodontic brackets after intraoral aging. Thirty Incognito™ (3M Unitek, Bad Essen, Germany) lingual brackets were studied, 15 brackets as received (control group) and 15 brackets retrieved from different patients after orthodontic treatment. The surface of the wing area was examined by scanning electron microscopy (SEM). Backscattered electron imaging (BEI) was performed, and the elemental composition was determined by X-ray EDS analysis (EDX). After appropriate metallographic preparation, the mechanical properties tested were Martens hardness (HM), indentation modulus (EIT), elastic index (ηIT), and Vickers hardness (HV). These properties were determined employing instrumented indentation testing (IIT) with a Vickers indenter. The results were statistically analyzed by unpaired t-test (α=0.05). There were no statistically significant differences evidenced in surface morphology and elemental content between the control and the experimental group. These two groups of brackets showed no statistically significant difference in surface morphology. Moreover, the mean values of HM, EIT, ηIT, and HV did not reach statistical significance between the groups (p>0.05). Under the limitations of this study, it may be concluded that the surface elemental content and microstructure as well as the evaluated mechanical properties of the Incognito™ lingual brackets remain unaffected by intraoral aging.

Keywords: hardness; instrumented indentation testing; lingual; orthodontic brackets; scanning electron microscopy; surface analysis

References

  • [1]

    Binary alloy phase diagramms. ed Massalksi T. Vol 1. ASM Materials Park, OH, USA, 1990;383.Google Scholar

  • [2]

    Bishara SE. Oral lesions caused by an orthodontic retainer: a case report. Am J Orthod Dentofacial Orthop 1995;108: 115–117.Google Scholar

  • [3]

    Buckley J. Lingual orthodontics: an illustrated review with the incognito fully customised appliance. J Ir Dent Assoc 2012;58: 149–155.Google Scholar

  • [4]

    Darabara MS, Bourithis LI, Zinelis S, Papadimitriou GD. Metallurgical characterization, galvanic corrosion, and ionic release of orthodontic brackets coupled with Ni-Ti archwires. J Biomed Mater Res B Appl Biomater 2007;81: 126–134.Google Scholar

  • [5]

    Eliades T, Zinelis S, Eliades G, Athanasiou AE. Nickel content of as-received, retrieved, and recycled stainless steel brackets. Am J Orthod Dentofacial Orthop 2002;122: 217–220.Google Scholar

  • [6]

    Freitas MP, Oshima HM, Menezes LM. Release of toxic ions from silver solder used in orthodontics: an in-situ evaluation. Am J Orthod Dentofacial Orthop 2011;140: 177–181.Google Scholar

  • [7]

    Fujita K. New orthodontic treatment with lingual bracket mushroom arch wire appliance. Am J Orthod 1979;76: 657–675.Google Scholar

  • [8]

    Gioka C, Bourauel C, Zinelis S, Eliades T, Silikas N, Eliades G. Titanium orthodontic brackets: structure, composition, hardness and ionic release. Dent Mater 2004;20: 693–700.Google Scholar

  • [9]

    ISO-14577-1. Metallic materials—instrumented indentation test for hardness and materials parameters. Geneva: International Organization for Standardization 2002.Google Scholar

  • [10]

    Scaglione F, Rizzi P, Battezzati L. De-alloying kinetics of an Au-based amorphous alloys. J Alloy Compd 2012;536: S60–S64.Google Scholar

  • [11]

    Schuster G, Reichle R, Bauer RR, Schopf PM. Allergies induced by orthodontic alloys: incidence and impact on treatment. Results of a survey in private orthodontic offices in the Federal State of Hesse, Germany. J Orofac Orthop 2004;65: 48–59.Google Scholar

  • [12]

    Shahdad SA, McCabe JF, Bull S, Rusby S, Wassell RW. Hardness measured with traditional Vickers and Martens hardness methods. Dent Mater 2007;23: 1079–1085.Google Scholar

  • [13]

    Soteriou D, Ntasi A, Papagiannoulis L, Eliades T, Zinelis S. Decomposition of Ag-based soldering alloys used in space maintainers after intra-oral exposure. A retrieval analysis study. Acta Odontol Scand 2014;72: 130–138.Google Scholar

  • [14]

    Steigerwald R. Metallurgically influenced corrosion. In: ASM Corrosion Vol 13: ASM International. Materials Park, OH, USA, 1987: 130–134.Google Scholar

  • [15]

    Wiechmann D. A new bracket system for lingual orthodontic treatment. Part 1: Theoretical background and development. J Orofac Orthop 2002;63: 234–245.Google Scholar

  • [16]

    Zinelis S, Al Jabbari YS, Gaintantzopoulou M, Eliades G, Eliades T. Mechanical properties of orthodontic wires derived by instrumented indentation testing (IIT) according to ISO 14577. Prog Orthod 2015;16: 19.Google Scholar

  • [17]

    Zinelis S, Sifakakis I, Katsaros C, Eliades T. Microstructural and mechanical characterization of contemporary lingual orthodontic brackets. Eur J Orthod 2014;36: 389–393.Google Scholar

About the article

Corresponding author: Theodore Eliades, Clinic of Orthodontics and Paediatric Dentistry, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, CH-8032 Zurich, Phone: +41 44 634 32 10/11, Fax: +41 44 634 43 35


Received: 2015-11-03

Accepted: 2016-03-02

Published Online: 2016-04-06

Published in Print: 2017-02-01


Conflict of interest statement: The authors confirm that they have no competing or financial interests in the products used.


Citation Information: Biomedical Engineering / Biomedizinische Technik, Volume 62, Issue 1, Pages 97–102, ISSN (Online) 1862-278X, ISSN (Print) 0013-5585, DOI: https://doi.org/10.1515/bmt-2015-0205.

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