The effects of palatal anchorage device on molar distalization with clear aligner: Three-dimensional finite element analysis.

IF 2.7 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

American Journal of Orthodontics and Dentofacial Orthopedics Pub Date : 2025-05-14 DOI:10.1016/j.ajodo.2025.04.012

Xuan Tang, Mengjie Wang, Xueqin Hu, Leilei Zheng, Chongshi Yang

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引用次数: 0

Abstract

Introduction: This study aimed to analyze the biomechanical effects of the combined use of clear aligner and palatal anchorage devices (transpalatal arch [TPA], combination of TPA and microimplant [MI]) during maxillary molar distalization.

Methods: Three-dimensional finite element models were established to simulate molar distalization, incorporating 7 configurations: Without-TPA, TPA-no-MI, TPA-with-MI1, TPA-with-MI2, TPA-with-MI3, TPA-with-MI4, and TPA-with-MI5. The 3-dimensional displacements of upper teeth and von Mises stress distribution in the periodontal ligament were evaluated.

Results: The use of palatal anchorage devices enhanced the anchorage of anterior teeth and improved molar distalization. The efficacy of anchorage enhancement is related to the relative position of MI and the center of resistance of the maxillary dentition.

Conclusions: TPA placed on the first premolars effectively reinforces anterior anchorage during molar distalization with clear aligner. The combination of TPA and palatal MI can strengthen anterior tooth anchorage further.

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腭支抗器对牙槽矫正器磨牙远端影响的三维有限元分析。

简介：本研究旨在分析在上颌磨牙远端中联合使用透明矫正器和腭支抗装置（经腭弓[TPA]， TPA联合微种植体[MI]）的生物力学效应。方法：建立三维有限元模型模拟磨牙远端，包括7种构型：不含tpa、tpa -不含- mi、tpa -带- mi、tpa -带- mi、tpa -带- mi、tpa -带- mi、tpa -带- mi、tpa -带- mi、tpa -带- mi、tpa -带- mi。观察上牙的三维位移和牙周韧带的von Mises应力分布。结果：腭支抗装置的使用增强了前牙的支抗，改善了磨牙的远端。支抗增强的效果与上颌牙列阻力中心相对位置有关。结论：在第一前磨牙上放置TPA可以有效地加强前支抗。TPA联合上腭心肌梗死可进一步加强前牙支抗。

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

American Journal of Orthodontics and Dentofacial Orthopedics 医学-牙科与口腔外科

CiteScore

4.80

自引率

13.30%

发文量

432

审稿时长

66 days

期刊介绍： Published for more than 100 years, the American Journal of Orthodontics and Dentofacial Orthopedics remains the leading orthodontic resource. It is the official publication of the American Association of Orthodontists, its constituent societies, the American Board of Orthodontics, and the College of Diplomates of the American Board of Orthodontics. Each month its readers have access to original peer-reviewed articles that examine all phases of orthodontic treatment. Illustrated throughout, the publication includes tables, color photographs, and statistical data. Coverage includes successful diagnostic procedures, imaging techniques, bracket and archwire materials, extraction and impaction concerns, orthognathic surgery, TMJ disorders, removable appliances, and adult therapy.