3D打印个性化正畸装置对单根牙垂直移动的三维有限元分析  

Three-dimensional finite element analysis of three-dimensional printed personalized orthodontic appliances for vertical movement of single teeth

作　　者：曹怡琳 王心彧 庄妍[1,2] 王亚茹 姜至秀 刘丹瑜 门九旭 丁元圣 Cao Yilin;Wang Xinyu;Zhuang Yan;Wang Yaru;Jiang Zhixiu;Liu Danyu;Men Jiuxu;Ding Yuansheng(Key Laboratory of Biomedical Materials and Clinical Application in Heilongjiang Province,Jiamusi 154002,Heilongjiang Province,China;School of Stomatology,Jiamusi University,Jiamusi 154002,Heilongjiang Province,China)

机构地区：[1]黑龙江省生物医学材料及应用重点实验室,黑龙江省佳木斯市154002 [2]佳木斯大学口腔医学院,黑龙江省佳木斯市154002

出　　处：《中国组织工程研究》2025年第16期3360-3368,共9页Chinese Journal of Tissue Engineering Research

基　　金：黑龙江省教育厅基本科研业务费基础研究项目(2019-KYYWF-1359),课题名称:氟涂层后AZ31B镁合金微种植体对周围炎症的影响,项目负责人:丁元圣。

摘　　要：背景:基于牙齿垂直移动原理,通过数字化设计结合3D打印制作个性化正畸装置,可使个性化正畸装置与单个切牙形成支抗系统。借助微种植体绝对支抗作用可对单根牙在三维方向上进行精准控制。目的:基于生物力学原理设计了牙位11、12、21、22压低移动与伸长移动的个性化正畸装置,通过三维有限元法分析个性化正畸装置的安全性与其对牙齿的移动作用。方法:应用Mimics、Geomagic Wrap、SolidWorks和Ansys Workbench软件分别建立了上颌前牙区(牙位11、12、21、22)牙槽骨-牙周膜-上颌切牙-个性化悬臂微种植体-连接板-个性化托槽的三维有限元模型,每个牙位分别设置个性化压低移动与伸长移动正畸装置,加载300 g拉力或推力,分析个性化正畸装置各部件应力水平,计算牙齿位移与牙周膜应力分布情况。结果与结论:①个性化压低移动正畸装置受到的最大等效应力为162.90 MPa,个性化伸长移动正畸装置受到的最大等效应力239.57 MPa,二者的最大等效应力均位于个性化托槽加力附件的垂直部分,个性化正畸装置各部件所受等效应力均在屈服强度内,均具有良好的安全性;②在个性化正畸装置作用下,牙齿初始位移呈现整体压低或伸长移动的趋势,垂直方向上的位移远远超过在水平方向和矢状方向上的位移;牙周膜根尖或颈部位置出现等效应力峰值,在根尖区牙周膜出现等效应力集中区域;③结果显示,个性化正畸装置可以使牙位11、12、21、22近似达到压低移动或伸长移动的目的,初步证实了个性化垂直移动正畸装置的有效性。BACKGROUND:Based on the principle of vertical tooth movement,a personalized orthodontic appliance is created through digital design combined with 3D printing,so that the personalized orthodontic appliance forms a support system with the individual incisors.With the help of the absolute support of the microimplant,the single tooth is precisely controlled in a three-dimensional direction.OBJECTIVE:To design personalized orthodontic appliances with 11,12,21,and 22 intrusion and extrusion based on biomechanical principles,and analyze the safety of the personalized orthodontic appliances in terms of their movement effect on the teeth by means of the three-dimensional finite element method.METHODS:Three-dimensional finite element models of alveolar bone-periodontium-maxillary incisors-personalized cantilever micro-implant-connecting plates-personalized brackets in the maxillary anterior region(teeth numbers 11,12,21,and 22)were established using Mimics,Geomagic Wrap,SolidWorks,and Ansys Workbench software,respectively.Personalized orthodontic appliances with low pressure movement and extended movement were set up at each tooth position.The stress level of each component of the personalized orthodontic appliances was analyzed,and the tooth displacement and periodontal stress distribution were calculated under loading of 300 g tensile or thrust force.RESULTS AND CONCLUSION:(1)The maximum equivalent force on the personalized intrusion mobile orthodontic appliance was 162.90 MPa,and the maximum equivalent force on the personalized extrusion mobile orthodontic appliance was 239.57 MPa.The maximum equivalent stress on both devices was located in the vertical portion of the personalized bracket loading attachment.The equivalent stresses on each part of the personalized orthodontic appliance were all within the yield strength,and they had good safety.(2)The initial displacement of the teeth under the action of the personalized orthodontic appliances showed a tendency towards overall intrusion or extrusion,with the displacement

关 键 词：3D打印个性化正畸装置 单根牙 压低移动 伸长移动 三维有限元分析 支抗 生物力学 

分 类 号：R459.9[医药卫生—治疗学] R318[医药卫生—临床医学] R783.5