[1]唐 倩,欧晓丽,方志欣,等.无托槽隐形矫治器扩展上颌牙弓时附件差异对后牙位移的三维有限元分析[J].中国美容医学,2024,(6):117-120.
　TANG Qian,OU Xiaoli,FANG Zhixin,et al.Three Dimensional Finite Element Analysis of the Infl uence of Attachment Differences on Posterior Tooth Displacement During the Expansion of Maxillary Arch with Non Bracket Concealed Orthodontic Appliances[J].Medical Aesthetics and Beauty,2024,(6):117-120.
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无托槽隐形矫治器扩展上颌牙弓时附件差异对后牙位移的三维有限元分析()
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《中国美容医学》[ISSN:1008-6445/CN:61-1347/R]

卷:
期数:
2024年6期
页码:
117-120
栏目:
出版日期:
2024-06-10

文章信息/Info

Title:
Three Dimensional Finite Element Analysis of the Infl uence of Attachment Differences on Posterior Tooth Displacement During the Expansion of Maxillary Arch with Non Bracket Concealed Orthodontic Appliances
文章编号:
1008-6455(2024)06-0117-04
作者:
唐 倩1 ; 欧晓丽2 ; 方志欣1 ; 龙智灵1 ; 罗海欧1
(广西壮族自治区人民医院 1. 正畸科;2.儿童口腔科 广西 南宁 530000 )
Author(s):
TANG Qian 1 ;  OU Xiaoli2 ;  FANG Zhixin1 ;  LONG Zhiling1 ;  LUO Haiou1
( 1.Department of Othodontics, 2.Department of Children Stomatology, the People’s Hospital of Guangxi Zhuang Autonomous Region, Nanning 530000, Guangxi, China )
关键词:
三维有限元; 无托槽隐形矫治器; 附件; 扩弓
Keywords:
three dimensional fi nite element;  non bracket invisible appliance;  attachment;  expansion of maxillary
分类号:
R738.2
文献标志码:
A
摘要:
目的：利用全牙列精准扫描建模分析无托槽隐形矫治器扩展上颌牙弓时对后牙三维位移的影响。方法：选择2017年1 月-2022年6月就诊于笔者医院口腔正畸科的86例成年患者为研究对象。所有患者均为安氏I类错牙合，矫治方案设计为仅通过 邻面去釉的方式排齐上下前牙，在全牙列精准扫描建模的基础上，构建无托槽隐形矫治器进行上颌牙弓扩弓前以及扩弓后 的后牙三维方向有限元模型的对比。结果：第5组位移量的最大值（3.315 17）与最小值（3.139 25）的比值均为所有组 别中最小的。与其他组相比，第5组位移最小值与根尖的距离更近；第5组的第二前磨牙对应得到的等效应力值最小，应力 的分布更为均匀。结论：施加附件作用时，对前磨牙的控根效果显著优于磨牙，其中优化后扩弓支持附件对后牙的控根效果 更为优秀。
Abstract:
Objective To analyze the effect of using fully fractured precision scanning modeling on the three-dimensional displacement of posterior teeth when expanding the maxillary arch with a non bracket invisible orthodontic appliance. Methods 86 adult patients who visited the orthodontic department of the author’s hospital from January 2017 to June 2022 were selected as the research subjects. All patients had Class I malocclusion, and the treatment plan was designed to align the upper and lower anterior teeth only through adjacent enamel removal. Based on accurate scanning modeling of the entire dental arch, a non bracket invisible orthodontic device was constructed to compare the three-dimensional fi nite element models of the posterior teeth before and after maxillary arch expansion. Results The ratio of the maximum displacement (3.315 17) to the minimum displacement (3.139 25) in Group 5 is the smallest among all groups. Compared with other groups, the minimum displacement in Group 5 is closer to the root tip; The equivalent stress value obtained for the second premolar in Group 5 is the smallest, and the stress distribution is more uniform. Conclusion When the attachment eff ect is applied, the root control eff ect on premolars is signifi cantly better than that on molars, and the optimized post expansion support attachment has a better root control eff ect on posterior teeth.

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更新日期/Last Update: 2024-06-14