Department of Oral Medical Technology, School of Dentistry, Faculty of Medicine, University of Bonn, Bonn, Germany.
Department of Orthodontics, Faculty of Dentistry, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.
Am J Orthod Dentofacial Orthop. 2022 Sep;162(3):348-359.e2. doi: 10.1016/j.ajodo.2021.03.029. Epub 2022 May 7.
The assessment of forces and moments generated by fully customized lingual appliances and their effectiveness in tooth movement were compared with conventional labial bracket systems, applied to a specific malocclusion model.
Two fully customized lingual appliances (Incognito [3M Unitek, Monrovia, Calif] and WiN [DW Lingual Systems, Bad Essen, Germany]) and 2 labial bracket systems (Discovery classic and Discovery smart [Dentaurum, Ispringen, Germany]) were examined with nickel-titanium wires of different cross-sections (0.012, 0.014, 0.016, and 0.016 × 0.022-in) and 3 tooth types (canine, lateral incisor, and second premolar). Simulated movement was performed with a wire replacement as soon as forces or moments were no longer effective.
Lingual and labial appliances showed statistically significant differences in initial forces and moments when tested with the same cross-section wires. Statistically significant differences between the 2 lingual bracket systems were also registered. Both lingual appliances rotated the premolar less than the conventional labial appliances.
In areas of smaller lingual interbracket distance and higher lingual slot misalignment, the tested lingual multibracket appliances showed higher forces than the labial appliances. The force difference was particularly prominent with vertically oriented lingual slots and rectangular wires. The tested lingual appliances presented difficulties in rotating the premolar.
本文比较了完全定制舌侧矫治器产生的力和力矩及其在牙齿移动方面的有效性，并与应用于特定错颌畸形模型的传统唇侧托槽系统进行了比较。
本文对两种完全定制的舌侧矫治器（Incognito [3M Unitek，Monrovia，CA]和 WiN [DW Lingual Systems，Bad Essen，Germany]）和两种唇侧托槽系统（Discovery classic 和 Discovery smart [Dentaurum，Ispringen，Germany]）进行了检查，使用了不同横截面（0.012、0.014、0.016 和 0.016×0.022 英寸）和 3 种牙齿类型（尖牙、侧切牙和第二前磨牙）的镍钛合金丝。一旦力或力矩不再有效，就会用更换的金属丝进行模拟移动。
当使用相同横截面的金属丝进行测试时，舌侧和唇侧矫治器在初始力和力矩方面表现出显著的统计学差异。两种舌侧托槽系统之间也记录到了显著的统计学差异。与传统的唇侧矫治器相比，两种舌侧矫治器旋转前磨牙的程度都较小。
在较小的舌侧弓丝间距和较高的舌侧槽错位区域，测试的舌侧多用途矫治器显示出比唇侧矫治器更高的力。当垂直定向的舌侧槽和矩形丝时，力的差异尤为显著。测试的舌侧矫治器在旋转前磨牙方面存在困难。
