Improvements of tooth movement efficiency and torque control in expanding the arch with clear aligners: a finite element analysis

作者全名："Yao, Song; Jiang, Wei; Wang, Chunjuan; He, Yao; Wang, Chao; Huang, Lan"

作者地址："[Yao, Song; Jiang, Wei; Wang, Chunjuan; He, Yao; Wang, Chao; Huang, Lan] Chongqing Med Univ, Stomatol Hosp, Chongqing, Peoples R China; [Yao, Song; Jiang, Wei; Wang, Chunjuan; He, Yao; Huang, Lan] Chongqing Key Lab Oral Dis & Biomed Sci, Chongqing, Peoples R China; [Yao, Song; Jiang, Wei; Wang, Chunjuan; He, Yao; Huang, Lan] Chongqing Municipal Key Lab Oral Biomed Engn Highe, Chongqing, Peoples R China; [Wang, Chao] Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Sch Biol Sci & Med Engn, Sch Engn Med,Key Lab Biomech & Mechanobiol,Minist, Beijing, Peoples R China"

通信作者："Huang, L (通讯作者)，Chongqing Med Univ, Stomatol Hosp, Chongqing, Peoples R China.; Huang, L (通讯作者)，Chongqing Key Lab Oral Dis & Biomed Sci, Chongqing, Peoples R China.; Huang, L (通讯作者)，Chongqing Municipal Key Lab Oral Biomed Engn Highe, Chongqing, Peoples R China."

来源：FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY

ESI学科分类：Multidisciplinary

WOS号：WOS:001010592600001

JCR分区：Q1

影响因子：4.3

年份：2023

卷号：11

期号：　

开始页：　

结束页：　

文献类型：Article

关键词：finite element analysis; clear aligner; arch expansion; tooth movement strategies; torque compensation

摘要："Objectives: The purpose of this study was to analyze the effect of different movement strategies, embossment structures, and torque compensation of the aligner on tooth movement during arch expansion using clear aligners by finite element analysis.Methods: Models comprising the maxilla, dentition, periodontal ligament, and aligners were created and imported into a finite element analysis software. The tests were performed using the following: three orders of tooth movement (including alternating movement with the first premolar and first molar, whole movement with second premolar and first molar or premolars and first molar), four different shapes of embossment structures (ball, double ball, cuboid, cylinder, with 0.05, 0.1, 0.15-mm interference) and torque compensation (0 degrees, 1 degrees, 2 degrees, 3 degrees, 4 degrees, and 5 degrees).Results: The expansion of clear aligners caused the target tooth to move obliquely. Alternating movement resulted in higher movement efficiency with lower anchorage loss as compared with whole movement. Embossment increased the efficiency of crown movement but did not contribute positively to torque control. As the angle of compensation increased, the tendency of oblique tooth movement was gradually controlled; however, the movement efficiency decreased concurrently, and stress distribution on the periodontal ligament became more even. For each 1 degrees increase in compensation, the torque per millimeter of the first premolar would decrease by 0.26 degrees /mm, and the crown movement efficiency eliminate decreased by 4.32%.Conclusion: Alternating movement increases the efficiency of the arch expansion by the aligner and reduces anchorage loss. Torque compensation should be designed to enhance torque control in arch expansion using an aligner."

基金机构："National Natural Science Foundation of China [12072055, 11872135, U20A20390]; China Oral Health Foundation [A2021-100]; Chinese Stomatological Association Youth Clinical Research Foundation for Orthodontics [CSA-O2020-07]; Natural Science Foundation of Beijing [L212063]; Chongqing medical scientific research project [2023MSXM098]; General project of Chongqing Yubei District Science and Technology Bureau [2020-17]; Postgraduate Scientific Research Innovation Project of Chongqing [CYS21228]"

基金资助正文："This work was supported by the National Natural Science Foundation of China (Grant No. 12072055, 11872135, U20A20390), The China Oral Health Foundation (Grant No. A2021-100), Chinese Stomatological Association Youth Clinical Research Foundation for Orthodontics (Grant No. CSA-O2020-07), Natural Science Foundation of Beijing (Grant No. L212063), Chongqing medical scientific research project (Grant No. 2023MSXM098), General project of Chongqing Yubei District Science and Technology Bureau (Grant No. 2020-17), The Postgraduate Scientific Research Innovation Project of Chongqing (Grant No. CYS21228)."