Tada Yoshifumi, Hayakawa Tohru, Nakamura Yoshiki
Department of Orthodontics, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
Department of Dental Engineering, Tsurumi University School of Dental Medicine, Yokohama 230-8501, Japan.
Materials (Basel). 2017 Aug 9;10(8):914. doi: 10.3390/ma10080914.
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 ( < 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 ( > 0.05). No significant difference was seen in static friction between all three PEEK wires and Ni-Ti wire ( > 0.05). It is suggested that 19-25PEEK will be applicable for orthodontic treatment with the use of slot-lid ligation.
聚醚醚酮（PEEK）如今作为牙科领域金属合金的替代品正受到关注。在本研究中，我们除了评估PEEK丝的摩擦性能外，还评估了其载荷 - 挠度特性。使用了三种类型的PEEK丝：两种尺寸的矩形，0.016×0.022平方英寸和0.019×0.025平方英寸（19 - 25PEEK），以及圆形，直径0.016英寸（16PEEK）。作为对照，使用了直径0.016英寸的镍钛正畸丝。在一种改良的正畸三点弯曲系统中评估三点弯曲性能。还测量了正畸丝与托槽之间的静摩擦力。除了采用槽盖结扎的16PEEK外，镍钛丝和PEEK丝的载荷 - 挠度曲线相似。19 - 25PEEK丝的弯曲力与镍钛丝相当。在槽盖结扎的情况下，19 - 25PEEK在1500μm挠度时显示出最高载荷（<0.05）。镍钛丝与所有三种PEEK丝之间的永久变形无显著差异（>0.05）。所有三种PEEK丝与镍钛丝之间的静摩擦力无显著差异（>0.05）。提示19 - 25PEEK可用于采用槽盖结扎的正畸治疗。
