Orthodontic Department, College of Dentistry, University of Baghdad, Baghdad, Iraq.
Clin Exp Dent Res. 2021 Jun;7(3):302-312. doi: 10.1002/cre2.377. Epub 2020 Dec 13.
To investigate the efficacy of polyether-ether-ketone (PEEK) wire as a fixed orthodontic retainer, by comparing its performance to other retainer wires and optimizing its adhesion to composite bonding materials.
Retainer wires of 15 mm segments were used, PEEK wires were prepared in cylindrical form with 0.8 mm diameter, and had two surface treatments namely air-abrasion and conditioning with adhesive system. Three different metallic retainer wires were used for comparison and three tests were performed; two tests measured debonding force and associated wire deflection from acrylic blocks and bovine teeth and one test for pull-out force. To test debonding force, a vertically directed compressive force was applied to the retainer wires bonded to the acrylic blocks and bovine teeth, while for pull-out test; a vertically directed tensile force detached the retainer wire.
In both debonding tests, PEEK wires (regardless the surface treatment) had non-significant difference when compared to each other, or to the other metallic wires, except the dead-soft coaxial wire group. The dead-soft coaxial wire group had significant difference when compared to other groups regarding both the force magnitude and maximum deflection, the only exception was the debonding force of the flat braided retainer wires bonded to bovine teeth. In pull-out test PEEK wires conditioned with adhesive system and the air-abraded recorded the second and third highest readings respectively.
Within the limitations of this study, the 0.8 mm round PEEK wires have comparable performance-in terms of debonding and pull out forces-to conventional retainers when bonded with 4 mm composite bonding spots; using air-abrasion for 10 s at 3.5 MPa provided sufficient adhesion of the composite to the wire, and conditioning with adhesive system may provide no further clinical benefit.
通过比较聚醚醚酮（PEEK）丝作为固定正畸保持器的性能，优化其与复合粘接材料的粘结力，研究 PEEK 丝的疗效。
使用 15mm 段的保持器丝，将 PEEK 丝制备成直径为 0.8mm 的圆柱形，表面处理有两种，即喷砂处理和使用粘接系统处理。比较了三种不同的金属保持器丝，进行了三个测试：两个测试测量了从丙烯酸块和牛牙上脱离的保持器丝的粘结力和相关的丝挠度，一个测试用于拉力测试。为了测试粘结力，将粘结在丙烯酸块和牛牙上的保持器丝垂直施加压缩力，而在拉力测试中，保持器丝垂直施加拉力。
在两个脱离测试中，无论表面处理如何，PEEK 丝（彼此之间）与其他金属丝（彼此之间）相比，除了超软同轴丝组外，差异均无统计学意义。超软同轴丝组与其他组在力的大小和最大挠度方面均有显著差异，唯一的例外是粘结到牛牙上的扁丝保持器丝的脱离力。在拉力测试中，用粘接系统处理的 PEEK 丝和喷砂处理的 PEEK 丝分别记录了第二和第三高的读数。
在本研究的限制内，0.8mm 圆形 PEEK 丝在与 4mm 复合粘接点粘结时，在脱离力和拉力方面与传统保持器具有相当的性能；在 3.5MPa 下喷砂处理 10s 可提供足够的复合粘接材料与丝的粘结力，使用粘接系统处理可能不会提供额外的临床益处。
