Three-dimensional fi nite element analysis of the eff ects of diff erent attachments on molar distal displacement in invisible orthodontics

Lubo Li, Pengju Yin, Xue Wang

Abstract


Objective: The aim of this study was to establish a three-dimensional fi nite element model and use fi nite element analysis to
explore the eff ects of diff erent attachments on the distal movement of molars. Methods: Using Mimics, Geomagic Wrap, Soildworks, and
Ansys software, a three-dimensional fi nite element model of the mandible was established. According to the diff erences in the attachment
attached to the second molar, the model was divided into four groups for ex periment: A-Rectangular attachment(abbreviation:RA); B-Half
water drop shaped attachment 1(abbreviation:HWDA1); C-Half water drop shaped attachment 2(abbreviation:HWDA2); D-Double half
water drop shaped attachments set(abbreviation:DHWDAS). The distal movement of molar was analyzed by simulating the orthodontic
process of invisible appliance with diff erent loads.Results: The displacement patterns of all models were accompanied by diff erent degrees
of tilt. From the simulation results alone, the root control eff ect of half water drop attachment 2 was slightly better than that of half water
drop attachment 1 and double half water drop attachments set, but both were better than rectangular attachments. In terms of volume, the
volume of the double half water drop attachments set was signifi cantly smaller than the other three groups, and the root control eff ect was
also better. Conclusion: Comprehensively, when simulating the distal displacement of the second molar with clear aligner, the double half
water drop attachments set has more advantages.

Keywords


Clear aligner; Attachment; Molar distal movement; Finite element analysis

Full Text:

PDF

Included Database


References


[1]K ESLING H D. Coordinating the predetermined pattern and tooth positioner with conventional treatment.[J]. American journal of orthodontics and oral

surgery,1946,32.

[2]B ai Yuxing, Zhou Jiemin, Wang Bangkang, Qi Peng, Gao Hongtao, Yan Yongnian, Zhag Jian, Deng Yan. Development and development of domestic

invisible orthodontic system[J].Beijing Oral Medicine,2004(02):89-92+96.

[3]S un Hongyan, Yang Li. Four cases of orthodontic teeth and jaw deformity with invisible appliance without braces[J].The Journal of Practical Oral

Medicine,2011,27(02):268-270.

[4]Z hou Jiemin, Bai Yuxing, Hao Wei. 3 D analysis and evaluation of the eff ect of mobile molars[J].Beijing Oral Medicine,2011,19(03):157-159.

[5]S amoto H, Vlaskalic V. A customized staging procedure to improve the predictability of space closure with sequential aligners[J]. J Clin Orthod, 2014,48(6)

: 359-367.

[6]M c Guinness N, Wilson AN,Jones M,et al. Stresses induced by edgewise appliances in the periodontal ligament-a fi nite element study[J]. The Angle

Orthodontist, 1992, 62(1): 15-22.

[7]L iu Qinghui. Finite element analysis of the movement of the maxillary central incisors under diff erent adnexa[D].North China University of Science and

Technology,2018.

[8]G u Zexu, Li Bianrong. Application of accessories in invisible correction technology[J]. The Chinese Journal of Practical Stomatology,2013, 6(11): 648-

652.




DOI: https://doi.org/10.18686/esta.v10i3.471

Refbacks

  • There are currently no refbacks.


Copyright (c) 2023 Lubo Li,Pengju Yin,Xue Wang