探索托槽扭矩表达：新型自锁托槽设计和弓丝几何形状的体外比较研究

IF 1.8 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

International Orthodontics Pub Date : 2024-09-23 DOI:10.1016/j.ortho.2024.100922

Vincent Thomas , Gaëlle Dol , Ziad Tannouri , Olivier François , Emmanuel Nicolas , Delphine Soulier-Peigue , Marwan El Helou

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引用次数: 0

摘要

目的这项体外研究旨在评估托槽与托槽底座结合时的扭矩表达效率。材料和方法在一个全牙弓打印的上颌模型中对扭矩表达进行了评估，重点是 11 号牙齿，该牙齿被放置在一个用 Typodont 蜡填充的牙槽中。使用了三种不同类型的托槽：传统金属托槽（Minidiamond™）、带基底扭矩的自锁托槽（Damon Q2™）和带槽内扭矩的新型自锁托槽（Damon Ultima™）。使用了两种不同的弓丝：矩形和斜方形不锈钢，尺寸分别为 0.019 × 0.025 英寸和 0.019 × 0.0275 英寸，产自 ORMCO™。研究包括七组：六组实验组和一组对照组，每组 15 次测量，共计 105 次扭矩测量。对牙齿的原始位置和扭矩表达后的最终位置进行光学印模。使用 GEOMAGIC 软件对 STL 文件进行叠加，以计算扭力表达的百分比。结果槽式扭力自锁托槽（Damon Ultima™）的扭力表达明显高于使用矩形不锈钢弓丝的基底扭力自锁托槽（Damon Q2™）（P = 0.00015）。使用斜方形不锈钢弓丝的 Ultima™ 托槽也比 Q2™ 和传统的 22° 托槽具有更高的扭矩表达（P = 0.003）。在任何托槽组中，矩形和斜方形不锈钢弓丝的扭矩表达均无明显差异（P >；0.05）。结论槽式扭矩自锁托槽的扭矩表达效果与传统托槽相当，但优于基底扭矩自锁托槽。弓丝的几何形状对扭力表达的影响不大。

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Exploring bracket torque expression: A comparative in vitro study of new self-ligating bracket designs and archwire geometries

Objective

This in vitro study aimed to evaluate the torque expression efficiency when it is integrated into the bracket slot versus the bracket base. Additionally, the impact of archwire geometry (rectangular vs. rhomboid) on torque expression has been examined.

Material and methods

The torque expression was evaluated in a full arch printed maxillary model, focusing on tooth #11, which was positioned within an alveolus filled with Typodont wax. Three different types of brackets were utilized: conventional metallic bracket (Minidiamond™), self-ligating bracket with torque in base (Damon Q2™), and a new self-ligating bracket design with torque in slot (Damon Ultima™). Two variations of archwires were used: rectangular and rhomboid stainless steel, measuring 0.019 × 0.025 inches and 0.019 × 0.0275 inches, respectively, from ORMCO™. The study included seven groups: six experimental groups and a control group, with 15 measurements in each group, totaling 105 torque measurements. Optical impressions were taken of the tooth's original position and its final position after torque expression. STL files were superimposed using GEOMAGIC software to calculate the percentage of torque expression.

Results

The self-ligating bracket with torque in slot (Damon Ultima™) shows significantly higher torque expression than the self-ligating bracket with torque in base (Damon Q2™) with a rectangular stainless steel archwire (P = 0.00015). The Ultima™ bracket also demonstrates higher torque expression than both the Q2™ and conventional 22° brackets with a rhomboid stainless steel archwire (P < 0.003). No significant difference in torque expression was found between the rectangular and rhomboid stainless steel archwires for any bracket group (P > 0.05).

Conclusions

The self-ligating bracket with torque in slot shows comparable torque expression effectiveness to the conventional bracket, outperforming the self-ligating bracket with torque in base. Archwire geometry does not significantly impact torque expression.

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来源期刊

International Orthodontics DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

2.50

自引率

13.30%

发文量

审稿时长

26 days

期刊介绍： Une revue de référence dans le domaine de orthodontie et des disciplines frontières Your reference in dentofacial orthopedics International Orthodontics adresse aux orthodontistes, aux dentistes, aux stomatologistes, aux chirurgiens maxillo-faciaux et aux plasticiens de la face, ainsi quà leurs assistant(e)s. International Orthodontics is addressed to orthodontists, dentists, stomatologists, maxillofacial surgeons and facial plastic surgeons, as well as their assistants.