Optimal positions of clear aligner attachments to achieve lower canine tipping and bodily movement using finite element analysis

IF 3.4 3区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of Dental Sciences Pub Date : 2024-07-12 DOI:10.1016/j.jds.2024.07.005
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Abstract

Background/purpose

Clear aligners are popular orthodontic tools because of their relatively aesthetic appearance and convenience of use. Nevertheless, bodily tooth movements still present challenges. This study evaluated various configurations of attachments placed on the mandibular canine in terms of the efficiency of canine bodily movement and correction of tipping.

Materials and methods

A finite element model of the mandible was constructed to investigate the effects of various attachment configurations on the overall bodily movement and undesirable tipping of a mandibular canine. Canine movements were categorized into four types, namely tipping and bodily movements in the mesial and distal directions. The size and shape of the attachments were fixed, but their placement and orientation were varied. Five and seven attachment configurations were evaluated for their influence on tipping and bodily movements, respectively.

Results

Attachment configuration significantly influenced mandibular canine tipping. The mesial occlusal–distal cervical and mesial occlusal–mesial cervical configurations had notable effects on mesial tipping, and the mesial occlusal–mesial cervical configuration excelled in distal tipping by increasing strain by 33.1%. The mesial occlusal–mesial cervical attachment configuration consistently had superior efficiency in facilitating both mesial and distal bodily movements of the canine.

Conclusion

The mesial occlusal–mesial cervical attachment configuration excelled in all four types of canine movement. Irrespective of the attachment configuration, canines tend to move overall with slight tipping due to skeletal resistance and their center of rotation. The attachment configuration is crucial to the success of clear aligner treatment and must be carefully considered in clinical practice.

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利用有限元分析法确定透明矫治器附件的最佳位置,以实现较低的犬齿倾斜和身体移动
背景/目的透明矫治器因其相对美观的外观和方便的使用而成为流行的正畸工具。然而,牙齿的身体移动仍然是一个挑战。本研究评估了放置在下颌犬齿上的各种附着体配置对犬齿身体移动和倾倒矫正的效率影响。犬齿运动分为四种类型,即倾倒和中远端方向的身体运动。附着体的大小和形状是固定的,但其位置和方向是变化的。分别评估了五种和七种附着体配置对倾倒和身体移动的影响。中侧咬合-远侧颈部和中侧咬合-中侧颈部配置对中侧倾倒有明显影响,而中侧咬合-中侧颈部配置对远侧倾倒的影响最大,应变增加了 33.1%。结论咬合中面-咬合中面颈部附着体结构在促进犬齿中、远端身体移动方面始终具有卓越的效率。无论采用哪种附着体结构,由于骨骼阻力和旋转中心的作用,犬齿在整体移动时都会有轻微的倾斜。附着体结构对透明矫治器治疗的成功至关重要,在临床实践中必须仔细考虑。
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来源期刊
Journal of Dental Sciences
Journal of Dental Sciences 医学-牙科与口腔外科
CiteScore
5.10
自引率
14.30%
发文量
348
审稿时长
6 days
期刊介绍: he Journal of Dental Sciences (JDS), published quarterly, is the official and open access publication of the Association for Dental Sciences of the Republic of China (ADS-ROC). The precedent journal of the JDS is the Chinese Dental Journal (CDJ) which had already been covered by MEDLINE in 1988. As the CDJ continued to prove its importance in the region, the ADS-ROC decided to move to the international community by publishing an English journal. Hence, the birth of the JDS in 2006. The JDS is indexed in the SCI Expanded since 2008. It is also indexed in Scopus, and EMCare, ScienceDirect, SIIC Data Bases. The topics covered by the JDS include all fields of basic and clinical dentistry. Some manuscripts focusing on the study of certain endemic diseases such as dental caries and periodontal diseases in particular regions of any country as well as oral pre-cancers, oral cancers, and oral submucous fibrosis related to betel nut chewing habit are also considered for publication. Besides, the JDS also publishes articles about the efficacy of a new treatment modality on oral verrucous hyperplasia or early oral squamous cell carcinoma.
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