The predictability of orthodontic tooth movements through clear aligner among first-premolar extraction patients: a multivariate analysis.

IF 4.8 2区 医学 Q1 Dentistry
Linghuan Ren, Lu Liu, Zhouqiang Wu, Di Shan, Lingling Pu, Yanzi Gao, Ziwei Tang, Xiaolong Li, Fan Jian, Yan Wang, Hu Long, Wenli Lai
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引用次数: 7

Abstract

Background: The purpose was to determine the predictability of tooth movements through clear aligner among premolar extraction patients and to explore the effects of various factors on tooth movements.

Methods: A total of 31 extraction patients (10 males and 20 females; age 14-44) receiving clear aligner treatment (Invisalign) were enrolled in this study. The actual post-treatment models and pre-treatment models were superimposed using the palatal area as a reference and registered with virtual post-treatment models. A paired t test was used to compare the differences between actual and designed tooth movements of maxillary first molars, canines, and central incisors. A multivariate linear mixed model was performed to examine the influence of variables on actual tooth movements.

Results: Compared to the designed tooth movements, the following undesirable tooth movements occurred: mesial movement (2.2 mm), mesial tipping (5.4°), and intrusion (0.45 mm) of first molars; distal tipping (11.0°), lingual tipping (4.4°), and distal rotation of canines (4.9°); lingual tipping (10.6°) and extrusion (1.5 mm) of incisors. Age, crowding, mini-implant, overbite, and attachments have differential effects on actual tooth movements. Moreover, vertical rectangular attachments on canines are beneficial in achieving more predictable canine and incisor tooth movements over optimized attachments. Lingual tipping and extrusion of incisors were significantly influenced by the interaction effects between incisor power ridge and different canine attachments (p < 0.05).

Conclusions: Incisors, canines, and first molars are subject to unwanted tooth movements with clear aligners among premolar extraction patients. Age, crowding, mini-implant, overbite, and attachments influence actual tooth movements. Moreover, vertical rectangular attachments on canines are beneficial in achieving more predictable incisor tooth movements over optimized canine attachments.

Abstract Image

Abstract Image

Abstract Image

在第一前磨牙拔牙患者中,通过清晰对准器矫正牙齿移动的可预测性:一项多变量分析。
背景:本研究旨在探讨前磨牙拔牙患者通过牙齿矫正器对牙齿移动的可预测性,并探讨各种因素对牙齿移动的影响。方法:共拔牙患者31例,其中男10例,女20例;年龄14-44岁,接受透明矫正器治疗(Invisalign)的患者被纳入本研究。以腭区为参照,将实际治疗后模型与治疗前模型进行叠加,并与虚拟治疗后模型进行配准。采用配对t检验比较上颌第一磨牙、犬齿和中门牙实际和设计的牙齿运动的差异。采用多元线性混合模型研究各变量对实际牙齿运动的影响。结果:与设计的牙齿移动相比,出现了以下不良牙齿移动:第一磨牙近端移动2.2 mm,近端倾斜5.4°,侵入0.45 mm;远端倾斜(11.0°)、舌端倾斜(4.4°)和犬齿远端旋转(4.9°);舌倾(10.6°)和门牙挤压(1.5 mm)。年龄、拥挤、微型种植体、覆咬和附着体对实际牙齿运动有不同的影响。此外,垂直矩形附着在犬齿有利于实现更可预测的犬齿和门牙的运动超过优化的附着。切牙动力脊与不同附著体的交互作用对切牙的舌尖倾斜和挤压有显著影响(p)。结论:在前磨牙拔牙患者中,切牙、犬齿和第一磨牙会发生不希望发生的牙齿移动。年龄、拥挤、微型种植体、复咬合和附着体影响实际的牙齿运动。此外,垂直矩形附着在犬齿有利于实现更可预测的门牙运动比优化的犬齿附着。
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来源期刊
Progress in Orthodontics
Progress in Orthodontics Dentistry-Orthodontics
CiteScore
7.30
自引率
4.20%
发文量
45
审稿时长
13 weeks
期刊介绍: Progress in Orthodontics is a fully open access, international journal owned by the Italian Society of Orthodontics and published under the brand SpringerOpen. The Society is currently covering all publication costs so there are no article processing charges for authors. It is a premier journal of international scope that fosters orthodontic research, including both basic research and development of innovative clinical techniques, with an emphasis on the following areas: • Mechanisms to improve orthodontics • Clinical studies and control animal studies • Orthodontics and genetics, genomics • Temporomandibular joint (TMJ) control clinical trials • Efficacy of orthodontic appliances and animal models • Systematic reviews and meta analyses • Mechanisms to speed orthodontic treatment Progress in Orthodontics will consider for publication only meritorious and original contributions. These may be: • Original articles reporting the findings of clinical trials, clinically relevant basic scientific investigations, or novel therapeutic or diagnostic systems • Review articles on current topics • Articles on novel techniques and clinical tools • Articles of contemporary interest
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