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。
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-dimensionalfinite element models of the posterior teeth before and after maxillary arch expansion.Results The ratio of the maximum displacement(3.31517)to the minimum displacement(3.13925)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 effect is applied,the root control effect on premolars is significantly better than that on molars,and the optimized post expansion support attachment has a better root control effect on posterior teeth.
作者
唐倩
欧晓丽
方志欣
龙智灵
罗海欧
TANG Qian;OU Xiaoli;FANG Zhixin;LONG Zhiling;LUO Haiou(Department of Othodontics,the People's Hospital of Guangxi Zhuang Autonomous Region,Nanning 530000,Guangxi,China;Department of Children Stomatology,the People's Hospital of Guangxi Zhuang Autonomous Region,Nanning 530000,Guangxi,China)
出处
《中国美容医学》
CAS
2024年第6期117-120,共4页
Chinese Journal of Aesthetic Medicine
基金
广西壮族自治区卫生健康委员会自筹经费科研项目(编号:Z20210689)。
关键词
三维有限元
无托槽隐形矫治器
附件
扩弓
three dimensionalfinite element
non bracket invisible appliance
attachment
expansion of maxillary
