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Materials 2017, 10(8), 914; doi:10.3390/ma10080914

Load-Deflection and Friction Properties of PEEK Wires as Alternative Orthodontic Wires

1
Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan
2
Department of Dental Engineering, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan
*
Author to whom correspondence should be addressed.
Received: 10 July 2017 / Revised: 27 July 2017 / Accepted: 2 August 2017 / Published: 9 August 2017
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Abstract

Polyetheretherketone (PEEK) is now attracting attention as an alternative to metal alloys in the dental field. In the present study, we evaluated the load-deflection characteristics of PEEK wires in addition to their frictional properties. Three types of PEEK wires are used: two sizes of rectangular shape, 0.016 × 0.022 in2 and 0.019 × 0.025 in2 (19-25PEEK), and rounded shape, diameter 0.016 in (16PEEK). As a control, Ni-Ti orthodontic wire, diameter 0.016 in, was used. The three-point bending properties were evaluated in a modified three-point bending system for orthodontics. The static friction between the orthodontic wire and the bracket was also measured. The load-deflection curves were similar among Ni-Ti and PEEK wires, except for 16PEEK with slot-lid ligation. The bending force of 19-25PEEK wire was comparable with that of Ni-Ti wire. 19-25PEEK showed the highest load at the deflection of 1500 μm (p < 0.05) in the case of slot-lid ligation. No significant differences were seen in the permanent deformation between Ni-Ti and all three PEEK wires (p > 0.05). No significant difference was seen in static friction between all three PEEK wires and Ni-Ti wire (p > 0.05). It is suggested that 19-25PEEK will be applicable for orthodontic treatment with the use of slot-lid ligation. View Full-Text
Keywords: orthodontic wire; PEEK; static friction; load deflection; three-point bending orthodontic wire; PEEK; static friction; load deflection; three-point bending
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Tada, Y.; Hayakawa, T.; Nakamura, Y. Load-Deflection and Friction Properties of PEEK Wires as Alternative Orthodontic Wires. Materials 2017, 10, 914.

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