使用自锁托槽和传统托槽治疗的患者在牙齿横向和矢状平面变化的比较。
Comparison of changes in the dental transverse and sagittal planes between patients treated with self-ligating and with conventional brackets.
作者信息
Moyano Javier, Montagut Diana, Perera Ramon, Fernández-Bozal Javier, Puigdollers Andreu
机构信息
Universitat Internacional de Catalunya, School of Dentistry, Department of Orthodontics (Barcelona, Spain).
Private practice (Almeria, Spain).
出版信息
Dental Press J Orthod. 2020 Jan-Feb;25(1):47-55. doi: 10.1590/2177-6709.25.1.047-055.oar.
INTRODUCTION
Several advantages have been established regarding the efficiency of self-ligating brackets (SL). In spite of some controversy surrounding this question in the literature, clinical results confirm that "arch development" requires fewer extractions.
OBJECTIVE
The objective of this study was to compare changes in the transverse and sagittal planes in patients treated with conventional ligating brackets (CL)as well as in patients treated with SL brackets and oversized arches.
METHODS
A sample was selected from a pool of 300 consecutive cases treated by a single clinician: 51 patients with SL brackets and oversized wires, and 55 with CL brackets. These two groups were compared with a control group of 20 patients. All plaster models were scanned and dental landmarks were measured to identify changes from commencement (T0) to conclusion (T1) of treatment. Lateral cephalograms were analyzed for changes in the lower incisor (IMPA) and the first lower molar distal angulation (MAng). Intraoperator reliability was tested with linear regression analysis. To assure all groups were comparable at T0, an ANOVA test with a 95%confidence interval (CI) was performed for all values. To assess changes from T0 to T1 in all groups, a Student's t-test with 95% CI was used. Finally, results from the three groups were compared using an ANOVA-test (95% CI) and a post-hoc test.
RESULTS
Increases in all the transverse variables were recorded in the two groups treated (SL and CL), except for the lower intercanine distance in the SL group. IMPA difference from T0 to T1 was higher in the CL group, and molar distal angulation (MAng) took place in the SL group.
CONCLUSIONS
Self-ligating brackets with oversized arches and conventional ligating brackets showed increases in all variables in the transverse plane, except for the SL group at the mandibular intercanine distance. In comparison with the CL group, fewer different IMPA values were observed in the SL group, in which distal molar angulation occurred.
引言
自锁托槽（SL）的效率已显现出诸多优势。尽管文献中围绕此问题存在一些争议，但临床结果证实，“牙弓扩展”所需的拔牙数量更少。
目的
本研究旨在比较使用传统结扎托槽（CL）治疗的患者以及使用自锁托槽和加大号牙弓治疗的患者在横向和矢状面上的变化。
方法
从由一位临床医生治疗的300例连续病例中选取样本：51例使用自锁托槽和加大号弓丝的患者，以及55例使用传统结扎托槽的患者。将这两组与一个由20例患者组成的对照组进行比较。对所有石膏模型进行扫描，并测量牙齿标志点，以确定从治疗开始（T0）到结束（T1）的变化。分析头颅侧位片以观察下切牙（IMPA）和第一下颌磨牙远中倾斜度（MAng）的变化。通过线性回归分析测试操作者内部的可靠性。为确保所有组在T0时具有可比性，对所有数值进行了95%置信区间（CI）的方差分析测试。为评估所有组从T0到T1的变化，使用了95%CI的学生t检验。最后，使用方差分析测试（95%CI）和事后检验比较三组的结果。
结果
在接受治疗的两组（SL组和CL组）中，所有横向变量均有增加，但SL组的下颌尖牙间距离除外。CL组从T0到T1的IMPA差异更大，而SL组出现了磨牙远中倾斜。
结论
使用加大号牙弓的自锁托槽和传统结扎托槽在横向平面上的所有变量均有增加，但SL组的下颌尖牙间距离除外。与CL组相比，SL组观察到的不同IMPA值更少，且出现了磨牙远中倾斜。
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