In Vitro Aligners Force Analysis in the Maxillary Arch During En-Masse Retraction With Different Attachment Positions.

IF 1.7 3区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

Orthodontics & Craniofacial Research Pub Date : 2025-08-01 DOI:10.1111/ocr.70013

Yongjie Fan, Xiaonan Sun, Xin Lv, Le An, Junting Wei, Bingle Wang, Gebing Liu

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引用次数: 0

Abstract

Objective: This study aimed to analyse the three-dimensional forces acting on maxillary teeth with aligners activation of en-masse retraction based on the different attachment positions in vitro.

Methods: Three groups were designed for the same 0.25 mm en-masse retraction forces with three different attachment positions. Group A1, without attachments; Group A2, with buccal attachments on maxillary posterior teeth; and Group A3, with lingual attachments on maxillary posterior teeth. Each group consisted of 12 aligners. Aligner forces were measured on a six-axis force transducer measurement system in real time.

Results: In Group A1 and A2, lingual and extrusive forces were observed on incisors, and canines primarily received distal forces. Mesial and lingual forces were both seen on posterior teeth. The forces on anterior teeth in Group A2 were significantly greater, and those on posterior teeth were significantly smaller than Group A1 (p < 0.05). In Group A3, lingual and extrusive forces on incisors and distal forces on canines were significantly greater than those in Group A1 and A2 (p < 0.05), while posterior teeth showed significantly smaller mesial and lingual forces (p < 0.05).

Conclusions: The position of attachments on maxillary posterior teeth significantly influences the force distribution on the maxillary dentition. Lingual attachments are more conducive to anterior teeth retraction and posterior teeth anchorage preservation.

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不同附着位置上颌弓整体内收时牙弓对准器力分析。

目的：分析上颌牙体在不同附着体位置下，对准器激活集体内收时对上颌牙体的三维作用力。方法：三组均采用相同的0.25 mm整体内收力，三种不同的附着位置。A1组，无附件；A2组，上颌后牙有颊附着体；A3组，上颌后牙有舌附著体。每组12个矫正器。在六轴力传感器测量系统上实时测量对准器力。结果：A1组和A2组在切牙上观察到舌力和挤出力，犬齿主要接受远端力。后牙内侧和舌侧均可见力。A2组前牙受力明显大于A1组，后牙受力明显小于A1组(p)。结论：上颌后牙附着体位置对上颌列受力分布有显著影响。舌附著体更有利于前牙后缩和后牙支抗的保存。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Orthodontics & Craniofacial Research 医学-牙科与口腔外科

CiteScore

5.30

自引率

3.20%

发文量

审稿时长

>12 weeks

期刊介绍： Orthodontics & Craniofacial Research - Genes, Growth and Development is published to serve its readers as an international forum for the presentation and critical discussion of issues pertinent to the advancement of the specialty of orthodontics and the evidence-based knowledge of craniofacial growth and development. This forum is based on scientifically supported information, but also includes minority and conflicting opinions. The objective of the journal is to facilitate effective communication between the research community and practicing clinicians. Original papers of high scientific quality that report the findings of clinical trials, clinical epidemiology, and novel therapeutic or diagnostic approaches are appropriate submissions. Similarly, we welcome papers in genetics, developmental biology, syndromology, surgery, speech and hearing, and other biomedical disciplines related to clinical orthodontics and normal and abnormal craniofacial growth and development. In addition to original and basic research, the journal publishes concise reviews, case reports of substantial value, invited essays, letters, and announcements. The journal is published quarterly. The review of submitted papers will be coordinated by the editor and members of the editorial board. It is policy to review manuscripts within 3 to 4 weeks of receipt and to publish within 3 to 6 months of acceptance.