隐形矫治下颌尖牙移动最佳附件位置的三维有限元分析  

Three-dimensional finite element analysis of the optimal attachment position for clear aligners of the lower canine

作　　者：赵玺 杨莉 ZHAO Xi;YANG Li(Department of Orthodontics,Urumqi Stomatological Hospital,Urumqi 830002,China)

机构地区：[1]乌鲁木齐市口腔医院正畸科,新疆乌鲁木齐830002

出　　处：《口腔医学》2025年第3期197-203,共7页Stomatology

基　　金：新疆维吾尔自治区卫生计生委青年医学科技人才专项科研项目(WJWY-XCZX202229)。

摘　　要：目的通过三维有限元分析比较不同附件以及不同放置位置对隐形矫治器矫正右侧下颌尖牙压低、伸长、扭转和扭矩移动中的影响。方法选取2022年在乌鲁木齐市口腔医院正畸科就诊的1例女性患者作为建模对象。构建三维有限元模型,模拟右侧下颌尖牙在压低、伸长、扭转和扭矩移动中,分别放置不同附件以及不同位置的21种工况,在矫治器附件对应位置施加大小为11.821 N的载荷,在Abaqus 6.14软件中模拟运算,收集各应力、位移分布云图及最大应力、位移值。结果在模拟正畸治疗的伸长组,附件位于颊侧切端时牙周膜和附件的PVMS值及尖牙位移最大。在模拟正畸治疗的压低组,可以观察到随着附件位置从切端到龈端,牙槽骨、尖牙、矫治器、附件的PVMS以及附件接触应力逐渐增大。在模拟正畸治疗的扭矩组,附件位于颊侧切端时尖牙PVMS最大。在模拟正畸治疗的扭转组,随着附件由切端向龈端移动,不论舌侧还是颊侧,尖牙位移量都在逐渐增大。结论①下颌尖牙分别进行伸长、压低、扭矩移动时,附件分别位于尖牙舌侧正中、尖牙颊侧正中最为适宜;下颌尖牙进行扭转移动时,附件位于尖牙颊侧中部、舌侧下部最为适宜。②牙齿舌侧的附件位置会极大地影响牙齿的移动和应力的分布。Objective To compare the effects of different attachments and their placement positions on the correction movements of intrusion,extrusion,rotation,and torque in the right mandibular canine using the three-dimensional finite element method.Methods A female patient treated in the Department of Orthodontics at the Urumqi City Stomatology Hospital in 2022 was chosen as the model subject.A three-dimensional finite element model was constructed to simulate various conditions of the right mandibular canine undergoing intrusion,extrusion,rotation,and torque movements with 21 different types of attachments placed at various positions.A load of 11.821 N was applied at the corresponding positions of the aligner attachments,and simulations were performed in Abaqus 6.14 software to collect stress and displacement distribution maps along with maximum stress and displacement values.Results In the simulation of orthodontic treatment for extrusion,the highest periodontal ligament Von Mises stress(PVMS)values and canine displacement occurred when the attachment was located at the upper region of buccal incisal.For the intrusion group,it was observed that PVMS values and contact stress of the alveolar bone,canine,aligner,and attachment gradually increased as the attachment position moved from the upper region to the lower region.In the torque simulation,the canine PVMS was the highest when the attachment was on the buccalupper region.In the rotation group,canine displacement incrementally increased as the attachment moved from the upper region to the lower region,regardless of whether it was on the lingual or buccal side.Conclusion①For the extrusion,intrusion,and torque movements of the lower canine,the most suitable attachment positions are on the middle lingual side and middle buccal sideof the canine;for the rotational movement of the lower canine,the attachments should be placed on the middle buccal side,and lower lingual side.②The lingual position of the tooth attachment greatly influences tooth movement and the distribut

关 键 词：隐形矫治 附件 尖牙 三维有限元分析 

分 类 号：R783.5[医药卫生—口腔医学]