Effects of novel microimplant-assisted rapid palatal expanders manufactured by 3-dimensional printing technology: A finite element study

作者全名："Pan, Shengyuan; Gao, Xiang; Sun, Jicheng; Yang, Zun; Hu, Bo; Song, Jinlin"

作者地址："[Pan, Shengyuan; Gao, Xiang; Sun, Jicheng; Yang, Zun; Hu, Bo; Song, Jinlin] Chongqing Med Univ, Coll Stomatol, Chongqing, Peoples R China; [Pan, Shengyuan; Gao, Xiang; Sun, Jicheng; Yang, Zun; Hu, Bo; Song, Jinlin] Chongqing Key Lab Oral Dis & Biomed Sci, Chongqing, Peoples R China; [Pan, Shengyuan; Gao, Xiang; Sun, Jicheng; Yang, Zun; Hu, Bo; Song, Jinlin] Chongqing Municipal Key Lab Oral Biomed Engn Highe, Chongqing, Peoples R China; [Hu, Bo; Song, Jinlin] Chongqing Med Univ, Coll Stomatol, Chongqing 401147, Peoples R China"

通信作者："Hu, B; Song, JL (通讯作者)，Chongqing Med Univ, Coll Stomatol, Chongqing 401147, Peoples R China."

来源：AMERICAN JOURNAL OF ORTHODONTICS AND DENTOFACIAL ORTHOPEDICS

ESI学科分类：CLINICAL MEDICINE

WOS号：WOS:001102633400001

JCR分区：Q1

影响因子：2.7

年份：2023

卷号：164

期号：5

开始页：700

结束页：711

文献类型：Article

关键词：　

摘要："Introduction: The expansion effects of several new microimplant-assisted rapid palatal expanders (MARPEs) manufactured by 3-dimensional printing technology were evaluated by finite element analysis (FEA). The aim was to identify a novel MARPE suitable for treating maxillary transverse deficiency. Methods: The finite element model was established using MIMICS software (version 19.0; Materialise, Leuven, Belgium). First, the appropriate microimplant insertion characteristics were identified via FEA, and several MARPEs with the above insertion patterns were manufactured by 3-dimensional printing technology. Then, the stress distribution and displacement prediction of the 4 MARPEs and hyrax expander (model E) were evaluated via FEA: bone -borne (model A), bone-tooth-borne (model B), bone-mucous-borne (model C), bone-tooth-mucous-borne (model D). Results: Monocortical microimplants perpendicular to the cortical bone on the coronal plane resulted in better expansion effects. Compared with a conventional hyrax expander, the orthopedic expansion of each of the 4 MARPEs was far larger, the parallelism was greater, and the posterior teeth tipping rate was lower. Among them, the expansion effects of models C and D were the best; the von Mises peak values on the surfaces of the microimplants were smaller than those of models A and B. Conclusions: This study may demonstrate that the 4 MARPEs obtained more advantageous orthopedic expansion effects than a hyrax expander. Models C and D obtained better biomechanical effects and had better primary stability. Overall, model D is the recommended expander for treating maxillary transverse deficiency because its structure acts like an implant guide and is beneficial for the accurate insertion of the microimplant. (Am J Orthod Dentofacial Orthop 2023;164:700-11)"

基金机构：2019 Chongqing Graduate Tutor Team Construction Project [dstd201903]; Chongqing Young and Middle-Aged Medical Excellence Team Project

基金资助正文：This work was supported by the 2019 Chongqing Graduate Tutor Team Construction Project (dstd201903) and Chongqing Young and Middle-Aged Medical Excellence Team Project.