低摩擦力与传统 TMA 正畸弓丝滑动过程中力损失的比较：一项体外研究。
Comparison of force loss during sliding of low friction and conventional TMA orthodontic archwires : An in vitro study.
机构信息
Department of Pediatric Dentistry and Orthodontics, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
Oral Technology, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Bonn, Germany.
出版信息
J Orofac Orthop. 2021 Jul;82(4):218-225. doi: 10.1007/s00056-020-00266-y. Epub 2020 Dec 2.
OBJECTIVE
The goal was to measure and compare the amount of force loss during tooth movement guided by archwires, including a newly introduced low-friction titanium molybdenum alloy (TMA), conventional TMA, and stainless steel archwires.
METHODS
The force loss was measured using a specialized biomechanical set-up, the orthodontic measurement and simulation system (OMSS). A total of 30 specimen were used (10 low-friction TMA (TMA-Low), 10 conventional TMA (TMA-C), and 10 stainless steel (SS) archwires, each having a dimension of 0.016 × 0.022 inches). The conventional and low friction TMA archwires served as test groups, while the SS archwires served as the control group.
RESULTS
The mean values of force loss between the three types of wires (TMA‑C, TMA-Low, and SS) were significantly different (p < 0.0001). The highest mean force loss during sliding movement was found in the conventional TMA group (72.1%), followed by low friction TMA (48.8%) and stainless steel wires (33.7%) in a descending order.
CONCLUSION
The friction property of the low friction TMA archwire was superior to the conventional TMA archwire but was still inferior to the stainless steel archwire.
目的
测量并比较弓丝引导牙齿移动过程中的力损失量，包括新引入的低摩擦钛钼合金（TMA）、传统 TMA 和不锈钢弓丝。
方法
使用专门的生物力学设置——正畸测量和模拟系统（OMSS）来测量力损失。共使用了 30 个样本（10 根低摩擦 TMA（TMA-Low）、10 根传统 TMA（TMA-C）和 10 根不锈钢（SS）弓丝，尺寸均为 0.016×0.022 英寸）。传统和低摩擦 TMA 弓丝作为实验组，而 SS 弓丝作为对照组。
结果
三种类型的弓丝（TMA-C、TMA-Low 和 SS）之间的力损失平均值差异具有统计学意义（p<0.0001）。在滑动运动中，传统 TMA 组的平均力损失最大（72.1%），其次是低摩擦 TMA（48.8%），不锈钢丝（33.7%）。
结论
低摩擦 TMA 弓丝的摩擦性能优于传统 TMA 弓丝，但仍逊于不锈钢弓丝。
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