在使用透明矫正器和微型植入物锚定的顺序远端化过程中,磨牙的有效贡献率:一项有限元研究。

IF 4.8 2区 医学 Q1 Dentistry Progress in Orthodontics Pub Date : 2023-10-09 DOI:10.1186/s40510-023-00485-0
Xulin Liu, Junjie Wu, Yuxun Cheng, Jie Gao, Yi Wen, Yubohan Zhang, Houzhuo Luo, Zuolin Jin, Yanning Ma
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引用次数: 0

摘要

引言:本研究旨在研究在磨牙远端化过程中,使用透明对准器(CA)和微型植入物进行锚固加固的生物力学效果。并探索了在顺序远端化过程中增强锚定的潜在临床策略。方法:建立有限元模型,模拟CA、微型种植体、上牙列、牙周膜(PDL)和牙槽骨。在第一组中,第二磨牙在第二组中进行了0.25mm的远端移动,在第二磨牙放置到目标位置后,第一磨牙远端移动0.25mm。每组由三个模型组成:模型A作为对照模型,模型B模拟通过精确切割连接到对准器上的微型植入物的使用,模型C模拟通过按钮连接的微型植入体的使用。模型B和C受到一系列牵引力的作用。我们分析了磨牙远端化、PDL静水应力和牙槽骨von Mises应力的有效贡献率。结果:在没有任何锚固加固的情况下,第二磨牙的远端化仅占0.25mm台阶距离的52.86%。剩余的百分比归因于锚定牙齿的近中移动和其他不希望的移动。模型B和C表现出磨牙远端化的有效贡献率增加和锚定损失减少。然而,磨牙倾斜和旋转的不希望的运动略有增加。在第二组中,由于第一磨牙远端化产生的相互作用力,第二磨牙表现出近中复发的现象。此外,研究发现,就贡献率而言,磨牙远端化的疗效与所施加的力的大小呈正相关。在需要更强锚固钢筋的情况下,精确切割是最好的方法。结论:微型种植体结合CA可提高磨牙远端化的有效贡献率。然而,需要注意的是,完全消除锚固损失是不可能实现的。为了减少不必要的移动,建议仔细规划锚固准备和过度矫正。
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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Effective contribution ratio of the molar during sequential distalization using clear aligners and micro-implant anchorage: a finite element study.

Introduction: This study aims to investigate the biomechanical effects of anchorage reinforcement using clear aligners (CAs) with microimplants during molar distalization. And also explores potential clinical strategies for enhancing anchorage in the sequential distalization process.

Methods: Finite element models were established to simulate the CAs, microimplants, upper dentition, periodontal ligament (PDL), and alveolar bone. In group set I, the 2nd molars underwent a distal movement of 0.25 mm in group set II, the 1st molars were distalized by 0.25 mm after the 2nd molars had been placed to a target position. Each group set consisted of three models: Model A served as the control model, Model B simulated the use of microimplants attached to the aligner through precision cuts, and Model C simulated the use of microimplants attached by buttons. Models B and C were subjected to a series of traction forces. We analyzed the effective contribution ratios of molar distalization, PDL hydrostatic stress, and von Mises stress of alveolar bone.

Results: The distalization of the 2nd molars accounted for a mere 52.86% of the 0.25-mm step distance without any reinforcement of anchorage. The remaining percentage was attributed to the mesial movement of anchorage teeth and other undesired movements. Models B and C exhibited an increased effective contribution ratio of molar distalization and a decreased loss of anchorage. However, there was a slight increase in the undesired movement of molar tipping and rotation. In group set II, the 2nd molar displayed a phenomenon of mesial relapse due to the reciprocal force produced by the 1st molar distalization. Moreover, the efficacy of molar distalization in terms of contribution ratio was found to be positively correlated with the magnitude of force applied. In cases where stronger anchorage reinforcement is required, precision cuts is the superior method.

Conclusions: The utilization of microimplants in conjunction with CAs can facilitate the effective contribution ratio of molar distalization. However, it is important to note that complete elimination of anchorage loss is not achievable. To mitigate undesired movement, careful planning of anchorage preparation and overcorrection is recommended.

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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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