具有明确对准器的上切牙扭矩运动:三维有限元分析。

IF 3.2 Q1 DENTISTRY, ORAL SURGERY & MEDICINE
Xin Yue Tang , Lei Zhang , Ting Jiang , Han Su , Jia Yi Chen , Yu Qi Qin , Bing Fang , Guo Hua Tang
{"title":"具有明确对准器的上切牙扭矩运动:三维有限元分析。","authors":"Xin Yue Tang ,&nbsp;Lei Zhang ,&nbsp;Ting Jiang ,&nbsp;Han Su ,&nbsp;Jia Yi Chen ,&nbsp;Yu Qi Qin ,&nbsp;Bing Fang ,&nbsp;Guo Hua Tang","doi":"10.1016/j.ejwf.2025.04.002","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><div>Torque movement is less effective in clear aligner therapy (CAT). This study aimed to analyze the torque movement behavior of incisors under different morphological modifications of aligner trimming lines by using three-dimensional finite element analysis to provide insights for clinical improvement.</div></div><div><h3>Methods</h3><div>A finite element model of the maxillary dentition was constructed from cone beam computed tomography data of an adult. CAT models were generated with different trimming line designs (scalloped, straight, and extended). A 0.5° palatal root torque movement was designed for incisors in each setup model with different center of rotation (COR) positions of 0, 1, 3, and 5 mm from the incisal edge.</div></div><div><h3>Results</h3><div>The incisors exhibited uncontrolled palatal tipping when COR was set at the incisal edge with all three trimming lines. Little compressive stress was observed on the palatal-incisal area of the incisors. Aligners with extended trimming line generated more compressive stress in the labial-cervical area of the incisors than those with straight and scalloped trimming lines, and the incisors showed less labial root displacement. As the programmed COR moved away from the incisal edge by 1, 3, and 5 mm, more compressive stress was found in the palatal-incisal area of the incisors. The incisor movement type shifted from palatal tipping, palatal root torque to labial tipping.</div></div><div><h3>Conclusion</h3><div>Extended trimming line is favorable but insufficient to achieve palatal root torque of upper incisors in CAT. Setting the COR some distance from the incisal edge in setup improves the predictability of such torque movement.</div></div>","PeriodicalId":43456,"journal":{"name":"Journal of the World Federation of Orthodontists","volume":"14 4","pages":"Pages 227-234"},"PeriodicalIF":3.2000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Upper incisal torque movement with clear aligners: A three‑dimensional finite element analysis\",\"authors\":\"Xin Yue Tang ,&nbsp;Lei Zhang ,&nbsp;Ting Jiang ,&nbsp;Han Su ,&nbsp;Jia Yi Chen ,&nbsp;Yu Qi Qin ,&nbsp;Bing Fang ,&nbsp;Guo Hua Tang\",\"doi\":\"10.1016/j.ejwf.2025.04.002\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Background</h3><div>Torque movement is less effective in clear aligner therapy (CAT). This study aimed to analyze the torque movement behavior of incisors under different morphological modifications of aligner trimming lines by using three-dimensional finite element analysis to provide insights for clinical improvement.</div></div><div><h3>Methods</h3><div>A finite element model of the maxillary dentition was constructed from cone beam computed tomography data of an adult. CAT models were generated with different trimming line designs (scalloped, straight, and extended). A 0.5° palatal root torque movement was designed for incisors in each setup model with different center of rotation (COR) positions of 0, 1, 3, and 5 mm from the incisal edge.</div></div><div><h3>Results</h3><div>The incisors exhibited uncontrolled palatal tipping when COR was set at the incisal edge with all three trimming lines. Little compressive stress was observed on the palatal-incisal area of the incisors. Aligners with extended trimming line generated more compressive stress in the labial-cervical area of the incisors than those with straight and scalloped trimming lines, and the incisors showed less labial root displacement. As the programmed COR moved away from the incisal edge by 1, 3, and 5 mm, more compressive stress was found in the palatal-incisal area of the incisors. The incisor movement type shifted from palatal tipping, palatal root torque to labial tipping.</div></div><div><h3>Conclusion</h3><div>Extended trimming line is favorable but insufficient to achieve palatal root torque of upper incisors in CAT. Setting the COR some distance from the incisal edge in setup improves the predictability of such torque movement.</div></div>\",\"PeriodicalId\":43456,\"journal\":{\"name\":\"Journal of the World Federation of Orthodontists\",\"volume\":\"14 4\",\"pages\":\"Pages 227-234\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the World Federation of Orthodontists\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2212443825000256\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"DENTISTRY, ORAL SURGERY & MEDICINE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the World Federation of Orthodontists","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2212443825000256","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"DENTISTRY, ORAL SURGERY & MEDICINE","Score":null,"Total":0}
引用次数: 0

摘要

背景:扭矩运动在清晰对准器治疗(CAT)中效果较差。本研究旨在通过三维有限元分析,分析在不同形态的矫正器修整线下,门牙的扭矩运动行为,为临床改进提供参考。方法:利用成人的锥束计算机断层扫描数据,建立上颌牙列的有限元模型。使用不同的修剪线设计(扇形、直线和延伸)生成CAT模型。在不同的旋转中心(COR)位置分别为距离切牙边缘0、1、3和5 mm时,设计每个设置模型中切牙的腭根扭矩运动0.5°。结果:当三种修剪线均在切牙边缘设置COR时,切牙表现出不受控制的腭倾。在切牙腭切区观察到很小的压应力。切边线延长的矫正器在切牙唇颈区产生的压应力比切边线平直的和扇形的更大,切牙的唇根位移更小。当程序COR从切牙边缘移动1、3和5 mm时,在切牙的腭-切牙区域发现更多的压应力。切牙的运动方式由上颚倾转、上颚根转转到唇部倾转。结论:延长切边线有利于实现上切牙的腭根扭矩,但不足以实现上切牙的腭根扭矩。在设置中,将COR设置在离切缘一定距离的地方,可以提高这种扭矩运动的可预测性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Upper incisal torque movement with clear aligners: A three‑dimensional finite element analysis

Background

Torque movement is less effective in clear aligner therapy (CAT). This study aimed to analyze the torque movement behavior of incisors under different morphological modifications of aligner trimming lines by using three-dimensional finite element analysis to provide insights for clinical improvement.

Methods

A finite element model of the maxillary dentition was constructed from cone beam computed tomography data of an adult. CAT models were generated with different trimming line designs (scalloped, straight, and extended). A 0.5° palatal root torque movement was designed for incisors in each setup model with different center of rotation (COR) positions of 0, 1, 3, and 5 mm from the incisal edge.

Results

The incisors exhibited uncontrolled palatal tipping when COR was set at the incisal edge with all three trimming lines. Little compressive stress was observed on the palatal-incisal area of the incisors. Aligners with extended trimming line generated more compressive stress in the labial-cervical area of the incisors than those with straight and scalloped trimming lines, and the incisors showed less labial root displacement. As the programmed COR moved away from the incisal edge by 1, 3, and 5 mm, more compressive stress was found in the palatal-incisal area of the incisors. The incisor movement type shifted from palatal tipping, palatal root torque to labial tipping.

Conclusion

Extended trimming line is favorable but insufficient to achieve palatal root torque of upper incisors in CAT. Setting the COR some distance from the incisal edge in setup improves the predictability of such torque movement.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Journal of the World Federation of Orthodontists
Journal of the World Federation of Orthodontists DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
3.80
自引率
4.80%
发文量
34
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信