中国实用口腔科杂志2026，Vol.19Issue(1)：54-60,7.DOI:10.19538/j.kq.2026.01.008
不同牵引位置对舌侧直丝弓矫治内收上前牙影响的有限元分析
Finite element analysis of the effect of different power arm positions on the maxillary anterior teeth retraction with lingual straight-wire appliance
摘要
Abstract
Objective To analyze the anterior teeth movement during en-masse retraction using lingual straight-wire ap-pliance with combinations of different positions and lengths of power arms and mini-implants through the three-dimen-sional finite element method.Methods The study was conducted from September 2024 to July 2025 at the Shanghai Ninth People's Hospital,and a 26-year-old female patient who attended the Department of Orthodontics was selected as the modeling subject.Finite element models were established for the maxillary lingual square straight-wire appliance.Two traction methods were used.The median traction was from the power arms placed on the mesial of the lateral incisors to the mini-implant on mid-palatal suture between the first and second molars.The lateral traction was from the power arms placed on the distal of the lateral incisors to the mini-implants on the palatal slopes between the first and second molars and 8 mm away from the archwire plane.Three dif-ferent lengths of the power arms were designed so that the traction force line passed through the alveolar ridge,23％of root length,and 50％of root length of the central inci-sors,respectively.Initial movement of the maxillary anteri-or teeth after loading was analyzed.Results With the in-crease in length of the power arms in medial traction,the central incisors changed from bodily movement to lingual root torque movement,the labial tipping of the lateral incisors increased,and the canines exhibited crown distal tipping.As the length of the power arms increased in the lateral trac-tion,the uncontrolled lingual tipping of the central incisors decreased first and then increased,while the lateral incisors shifted from lingual tipping to bodily movement,and the canines were approaching distal bodily movement.Conclusion When using lingual straight-wire appliance for retraction of maxillary anterior teeth,appropriate direction of traction should be designed according to clinical needs.The medial traction is conducive to the torque control and intrusion of the incisors.The lateral retraction is beneficial to the distal bodily movement of the canine while additional torque should be placed on the central incisors.关键词
舌侧矫治/直丝弓/前牙内收/牵引钩/微种植体Key words
lingual orthodontics/straight wire/anterior teeth retraction/power arm/mini-implant分类
医药卫生引用本文复制引用
秦毓琪,许艳婷,陈佳怡,唐国华..不同牵引位置对舌侧直丝弓矫治内收上前牙影响的有限元分析[J].中国实用口腔科杂志,2026,19(1):54-60,7.基金项目
上海市重中之重研究中心项目(2022ZZ01017) （2022ZZ01017）
中国医学科学院医学与健康科技创新工程项目(2019-I2M-5-037) （2019-I2M-5-037）
