Private Practice, İstanbul, Turkey.
Department of Orthodontics, School of Dentistry, University of Aydın Adnan Menderes, Aydın, Turkey.
J Orofac Orthop. 2022 Sep;83(5):307-317. doi: 10.1007/s00056-021-00295-1. Epub 2021 Apr 23.
The aim of this randomized prospective clinical study was to determine whether there are differences between customized lingual brackets and conventional labial brackets regarding the alignment of the mandibular arch and a reduction of the irregularity index during an 18-week treatment interval.
A total of 20 patients who presented with class I malocclusion for scheduled orthodontic treatment without tooth extraction were included. The patients were randomly assigned by numbered, opaque, sealed envelopes to treatment with customized lingual brackets or conventional labial brackets. During the initial alignment (T0), 0.012″ (T1), 0.014″ (T2), and 0.016″ (T3) nickel-titanium archwires were applied, respectively, and the control visits were scheduled at 6‑week intervals. In all sessions, digital models were obtained by an intraoral scanning device after removal of the archwire and were analyzed by software. Little's irregularity index, intercanine width, intermolar width and arch length were evaluated at three time points and were statistically analyzed with a repeated measures analysis of variance (ANOVA). Changes in these measurements at the three intervals (T1-T0, T2-T1, T3-T2) and overall treatment effects were also compared using the Student t‑test.
Comparing the two treatments regimes, intergroup mean values at T0, T1, T2, and T3 were not significantly different regarding the irregularity index, intercanine width, intermolar width and arch length.
In this pilot study, no differences between the two treatment approaches could be detected for the phase of initial mandibular alignment.
本随机前瞻性临床研究旨在确定定制舌侧托槽与传统唇侧托槽在 18 周治疗期间的下颌弓排齐和降低不整齐指数方面是否存在差异。
共纳入 20 名患有 I 类错颌畸形、需要正畸治疗且无需拔牙的患者。患者通过编号、不透明、密封的信封被随机分配接受定制舌侧托槽或传统唇侧托槽治疗。在初始排齐期（T0）、0.012″（T1）、0.014″（T2）和 0.016″（T3）镍钛弓丝分别应用时，分别安排了控制就诊时间，间隔为 6 周。在所有阶段，在去除弓丝后，通过口腔内扫描设备获得数字模型，并通过软件进行分析。在三个时间点评估 Little 不整齐指数、尖牙间宽度、磨牙间宽度和弓长，并使用重复测量方差分析（ANOVA）进行统计学分析。使用学生 t 检验比较这三个时间点（T1-T0、T2-T1、T3-T2）和整个治疗效果的这些测量值的变化。
比较两种治疗方案，T0、T1、T2 和 T3 时的组间平均值在不整齐指数、尖牙间宽度、磨牙间宽度和弓长方面无显著差异。
在本初步研究中，在初始下颌弓排齐阶段，两种治疗方法之间未发现差异。
