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单侧外弓扩展式颈带矫治力系统：基于有限元法的三维分析

Unilateral Outer Bow Expanded Cervical Headgear Force System: 3D Analysis Using Finite Element Method.

作者信息

Geramy Allahyar, Mortezai Omid, Esmaily Masomeh, Darvishpour Hojat

机构信息

Professor, Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Orthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.

Assistant Professor, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.

出版信息

J Dent (Tehran). 2015 Apr;12(4):271-80.

PMID:26622282
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4662765/
Abstract

OBJECTIVES

Headgears are among the effective orthodontic appliances to achieve treatment goals. Unilateral molar distal movement is sometimes needed during an orthodontic treatment, which can be achieved by an asymmetric headgear. Different unilateral headgears have been introduced. The main goal of this study was to analyze the force system of unilateral expanded outer bow asymmetric headgears by the finite element method (FEM).

MATERIALS AND METHODS

Six 3D finite element models of a mesiodistal slice of the maxilla containing upper first molars, their periodontal ligaments (PDLs), cancellous bone, cortical bone, and a cervical headgear with expanded outer bow attached to maxillary first molars were designed in SolidWorks 2010 and meshed in ANSYS Workbench ver. 12.1. The models were the same except for the degree of outer bow expansion. The outer bow ends were loaded with 2 N force. The distal driving force and the net moment were evaluated.

RESULTS

A decrease in the distalizing force in the normal side molar from 1.69 N to 1.37 N was shown by increasing the degree of unilateral expansion. At the same time, the force increased from 2.19 N to 2.49 N in the expanded side molar. A net moment increasing from 2.26 N.mm to 4.64 N.mm was also shown.

CONCLUSION

Unilateral outer bow expansion can produce different distalizing forces in molars, which increase by increasing the expansion.

摘要

目的

头帽是实现正畸治疗目标的有效矫治器之一。正畸治疗中有时需要单侧磨牙远中移动，这可通过不对称头帽来实现。已推出了不同的单侧头帽。本研究的主要目的是通过有限元法（FEM）分析单侧扩弓外弓不对称头帽的力系统。

材料与方法

在SolidWorks 2010中设计了六个包含上颌第一磨牙、其牙周膜（PDL）、松质骨、皮质骨以及附着在上颌第一磨牙上带有扩弓外弓的颈带式头帽的上颌近远中切片的三维有限元模型，并在ANSYS Workbench ver. 12.1中进行网格划分。除了外弓扩张程度不同外，这些模型是相同的。在外弓末端施加2 N的力。评估远中驱动力和净力矩。

结果

随着单侧扩张程度的增加，正常侧磨牙的远中向力从1.69 N降低至1.37 N。同时，扩弓侧磨牙的力从2.19 N增加至2.49 N。净力矩也从2.26 N·mm增加至4.64 N·mm。

结论

单侧外弓扩张可在磨牙上产生不同的远中向力，且随着扩张程度增加而增大。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/1bba95ff1e6f/JOD-12-271-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/65d2db946f73/JOD-12-271-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/9c7bc3499784/JOD-12-271-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/60c6e4743a7e/JOD-12-271-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/87a074079e31/JOD-12-271-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/1bba95ff1e6f/JOD-12-271-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/65d2db946f73/JOD-12-271-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/9c7bc3499784/JOD-12-271-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/60c6e4743a7e/JOD-12-271-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/87a074079e31/JOD-12-271-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/717b/4662765/1bba95ff1e6f/JOD-12-271-g005.jpg

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本文引用的文献

1
Finite element method (FEM) analysis of the force systems produced by asymmetric inner headgear bows.不对称内弓头帽所产生力系统的有限元法（FEM）分析
Aust Orthod J. 2011 Nov;27(2):125-31.
2
Biomechanical reevaluation of orthodontic asymmetric headgear.正畸不对称头帽的生物力学再评价。
Angle Orthod. 2012 Jul;82(4):682-90. doi: 10.2319/052911-357.1. Epub 2011 Dec 8.
3
Asymmetric headgear for differential molar movement: a study using finite element analysis.用于差动磨牙移动的不对称头帽：一项使用有限元分析的研究。
J Orthod. 2009 Sep;36(3):145-51. doi: 10.1179/14653120723130.
4
Comparison of methods used to correct a lingually tilted mandibular molar: 3-D analysis using the finite element method (FEM).用于矫正舌倾下颌磨牙的方法比较：使用有限元法（FEM）的三维分析。
Aust Orthod J. 2008 Nov;24(2):96-101.
5
Unequal outer and inner bow configurations: comparing 2 asymmetric headgear systems.内外弓形状不等：比较两种不对称头帽装置
Am J Orthod Dentofacial Orthop. 2005 Jul;128(1):68-75; discussion 75-7. doi: 10.1016/j.ajodo.2004.07.040.
6
An experimental evaluation of effects and side effects of asymmetric face-bows in the light of in vivo measurements of initial tooth movements.根据初始牙齿移动的体内测量结果，对不对称面弓的效果和副作用进行实验评估。
Am J Orthod Dentofacial Orthop. 1998 May;113(5):558-66. doi: 10.1016/s0889-5406(98)70267-7.
7
Biomechanical guidelines for headgear application.头帽应用的生物力学指南。
J Clin Orthod. 1982 May;16(5):308-12.
8
The level anchorage system for correction of orthodontic malocclusions.用于矫正正畸错牙合畸形的水平锚固系统。
Am J Orthod. 1981 Oct;80(4):395-410. doi: 10.1016/0002-9416(81)90174-3.
9
Unilateral face-bows: a theoretical and laboratory analysis.单侧面弓：一项理论与实验室分析。
Am J Orthod. 1981 Mar;79(3):229-49. doi: 10.1016/0002-9416(81)90072-5.
10
Controlling the magnitude, direction, and duration of extraoral force.控制口外力的大小、方向和持续时间。
Am J Orthod. 1971 Mar;59(3):217-43. doi: 10.1016/0002-9416(71)90097-2.