A recently developed orthodontic wire alloy known as GUMMETAL® is claimed to deliver more physiological forces to correct dental mispositioning. However, its mechanical characteristics have not been fully characterized yet. This study aimed to determine and compare the elastic properties of different wire alloys, such as nickel–titanium (NiTi), stainless steel (SS), and GUMMETAL®, and assess their unloading forces when combined with either conventional or self-ligating brackets (CL and SL) when correcting dental crowding. All wires had a 0.016″ cross-section diameter. A three-point bending test was performed to assess the maximum deflection of each wire. Then, a subsequent analysis measured the unloading force for each wire/bracket system in a dental crowding clinical simulation device. The test was carried out in a universal testing machine with a cross-speed displacement of 0.5 mm/min. Data were recorded in different ranges and statistically evaluated using two-way analysis of variance. GUMMETAL® displayed higher unloading mean forces in SL brackets (2228.78 cN) than CL brackets (1967.38 cN) for the 1.6–3.0 deflection interval (p = 0.018). Within this interval, NiTi showed higher forces when used with CL brackets (2683.06 cN) than with SL brackets (1179.66 cN) (p < 0.0001). For the CL bracket systems, SS wires showed higher forces (2125.31 cN) in the 1.0–1.6 deflection interval than the other two wire alloys (NiTi, 1541.52 cN and GUMMETAL®, 852.65 cN) (p < 0.0001). SS wires also displayed lower forces with SL brackets (1844.01 cN) than in CL brackets (2125.31 cN) (p = 0.049). Thus, only GUMMETAL® revealed to be an optimal choice for SL brackets, whereas NiTi for CL brackets.

最近开发的一种名为 GUMMETAL® 的正畸线合金据称可提供更多生理力以纠正牙齿错位。然而，其机械特性尚未完全表征。本研究旨在确定和比较不同线材合金的弹性特性，例如镍钛 (NiTi)、不锈钢 (SS) 和 GUMMETAL®，并评估它们与传统或自锁托槽结合使用时的卸载力。 CL 和 SL) 矫正牙齿拥挤时。所有电线的横截面直径均为 0.016 英寸。进行三点弯曲试验以评估每根线的最大挠度。然后，随后的分析测量了牙科拥挤临床模拟设备中每个线/支架系统的卸载力。试验在万能试验机上进行，横向速度位移为 0.5 mm/min。数据记录在不同的范围内，并使用双向方差分析进行统计评估。GUMMETAL® 在 SL 支架 (2228.78 cN) 中显示出比 CL 支架 (1967.38 cN) 更高的卸载平均力，挠度间隔为 1.6-3.0 (p  = 0.018）。在此区间内，NiTi 与 CL 托槽 (2683.06 cN) 一起使用时显示出比 SL 托槽 (1179.66 cN) 更高的力 ( p  < 0.0001)。对于 CL 支架系统，SS 线在 1.0-1.6 偏转区间内显示出比其他两种线合金（NiTi，1541.52 cN 和 GUMMETAL®，852.65 cN）更高的力（2125.31 cN）（p  < 0.0001）。与 CL 支架 (2125.31 cN) 相比，SS 线使用 SL 支架 (1844.01 cN) 的力也更低 ( p  = 0.049)。因此，只有 GUMMETAL® 被证明是 SL 托槽的最佳选择，而 NiTi 则是 CL 托槽的最佳选择。