Evaluation of miniscrew-assisted maxillary expansion in the treatment of unilateral maxillary constriction: A finite element study.

Q2 Dentistry
Journal of Orthodontic Science Pub Date : 2025-03-25 eCollection Date: 2025-01-01 DOI:10.4103/jos.jos_71_24
Shravan Shetty, Phad Sharad Trimbakrao, Utkarsh Mangal, Suraj Patil, Shah Mohammed Abdul Khader, M V Ashith, Satish Shenoy
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Abstract

Objective: The present study focused on evaluating and comparing the stresses and displacements generated by various designs of miniscrew-assisted maxillary expansion appliances. The primary focus of this study is on a modified design for treating unilateral maxillary constriction, analyzed using the finite element method (FEM).

Materials and methods: Using computed tomography (CT) scans and the modeling software Mimics, a three-dimensional (3D) mesh model of the skull and related maxillary structures was created. First, the necessary material characteristics were determined using FEM. Three models of miniscrew-assisted maxillary expansion appliances were then tested with ANSYS simulation software: (a) a bone-anchored rapid palatal expander (BARPE), (b) a conventional miniscrew-assisted rapid palatal expansion (C-MARPE), and (c) an asymmetric design of a MARPE focusing on unilateral expansion (U-MARPE). The asymmetric U-MARPE design features an attachment connecting the expander to the teeth on only one half of the maxilla. The stress, displacement, and distribution predictions for all three types of expanders were subsequently evaluated via FEM.

Results: Tooth displacement in the U-MARPE (on the expander-to-tooth attachment side) and C-MARPE groups was greater than that in the BARPE group. The stresses on the teeth were lowest in the BARPE and U-MARPE groups (on the expander-to-no-tooth attachment side). C-MARPE exhibited a symmetrical stress distribution around the miniscrew areas. Overall, U-MARPE generated the greatest amount of asymmetric von Mises stress and displacement on the dental landmarks.

Conclusion: This research indicates that, compared to other models, U-MARPE achieves more favorable unilateral expansion effects. The current U-MARPE design can be effectively used to correct unilateral transverse anomalies.

微型支架辅助上颌扩张治疗单侧上颌缩窄的评价:一项有限元研究。
目的:评价和比较不同设计的微型上颌辅助扩张器所产生的应力和位移。本研究的主要重点是治疗单侧上颌缩窄的改良设计,并使用有限元法(FEM)进行分析。材料与方法:使用计算机断层扫描(CT)扫描和建模软件模拟一个颅骨的三维(3 d)网格模型和相关的上颌骨结构创建。首先,采用有限元法确定了所需的材料特性。采用ANSYS仿真软件对三种微型辅助上颌扩张器模型进行了测试:(a)骨锚定快速腭扩张器(BARPE), (b)传统微型辅助快速腭扩张器(c -MARPE),以及(c)非对称设计的单侧扩张MARPE (U-MARPE)。不对称的U-MARPE设计的特点是连接扩展器到牙齿的附件,只有一半的上颌骨。随后通过有限元法对三种膨胀器的应力、位移和分布进行了预测。结果:U-MARPE组(扩展器与牙齿附着侧)和C-MARPE组的牙位移大于BARPE组。BARPE组和U-MARPE组(扩展器到无牙附着体侧)对牙齿的应力最低。C-MARPE在微孔周围表现出对称的应力分布。总体而言,U-MARPE在牙标上产生了最大的不对称von Mises应力和位移。结论:本研究表明,与其他模型相比,U-MARPE具有更有利的单侧扩张效果。目前的U-MARPE设计可以有效地用于纠正单侧横向异常。
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
Journal of Orthodontic Science
Journal of Orthodontic Science Dentistry-Orthodontics
CiteScore
0.90
自引率
0.00%
发文量
46
审稿时长
19 weeks
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