3D打印上颌单根扭转牙个性化正畸装置的三维有限元分析  

Three-dimensional finite element analysis of personalized orthodontic devices for 3D printed maxillary single-rooted rotated tooth

作　　者：庄妍 王心彧[3] 曹怡琳 丁元欣[3] 王佳琦[3] 于淼 栾春阳 丁元圣[3] Zhuang Yan;Wang Xinyu;Cao Yilin;Ding Yuanxin;Wang Jiaqi;Yu Miao;Luan Chunyang;Ding Yuansheng(Key Laboratory of Oral Biomedical Materials and Clinical Applications of Heilongjiang Province,Jiamusi 154002,Heilongjiang Province,China;School of Stomatology,Jiamusi University,Jiamusi 154002,Heilongjiang Province,China;Affiliated Stomatological Hospital of Jiamusi University,Jiamusi 154002,Heilongjiang Province,China)

机构地区：[1]黑龙江省口腔生物医学材料及临床应用重点实验室,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 [3]佳木斯大学附属口腔医院,黑龙江省佳木斯市154002

出　　处：《中国组织工程研究》2025年第30期6409-6415,共7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),项目负责人:丁元圣。

摘　　要：背景:在正畸治疗中,治疗单根重度扭转牙通常采用全口的治疗方法,针对单颗牙治疗方法较少。目的:基于生物力学原理设计了使11,12,13,21,22,23牙位旋转移动的个性化正畸装置,通过三维有限元法研究其对牙齿的移动作用。方法:基于牙齿旋转移动的生物力学原理,通过数字化设计结合3D打印制作个性化的正畸装置,使个性化正畸装置与牙齿形成支抗系统。利用微种植体的绝对支抗作用对单根扭转牙在三维方向上进行精准控制。采集1名女性志愿者上颌牙槽骨及牙体组织的锥体束CT数据,应用Mimics、Geomagic Wrap、SolidWorks、3-matic Research 15.0、Ansys Workbench软件分别建立了扭转牙-牙周膜-上颌骨-个性化正畸装置的三维有限元模型。计算在加载60 g推力下,个性化正畸装置的等效应力分布特点、牙齿的运动趋势与牙周膜等效应力分布特点。结果与结论:①个性化正畸装置受到的最大等效应力为47.71 MPa;②在个性化正畸装置作用下牙齿初始位移呈现旋转移动趋势,牙周膜的等效应力峰值集中的区域位于牙周膜颈部,而等效应力较低的区域位于根尖区;③通过有限元分析法初步验证了该上颌单根牙重度扭转时的个性化正畸装置具有安全性与可行性。BACKGROUND:In orthodontic treatment,full-mouth treatment is usually used to treat single-root severely twisted teeth,and single-tooth treatment is less common.OBJECTIVE:To design a personalized orthodontic device based on biomechanical principles to address the rotation of teeth 11,12,13,21,22,and 23,and evaluate the device’s impact on tooth movement using three-dimensional finite element method.METHODS:Based on the biomechanical principle of tooth rotation and movement,a personalized orthodontic device was made by digital design combined with three-dimensional printing,so that the personalized orthodontic device and the tooth formed an anchorage system.The absolute anchorage of the micro-implant was used to precisely control the single-root twisted tooth in the three-dimensional direction.The CBCT data of the maxillary alveolar bone and tooth tissue of a female volunteer were collected.The three-dimensional finite element models of the twisted tooth-periodontal ligament-maxillary bone-personalized orthodontic device were established using Mimics,Geomagic Wrap,SolidWorks,3-matic Research 15.0,and Ansys Workbench software.The equivalent stress distribution characteristics of the personalized orthodontic device,the movement trend of the tooth,and the equivalent stress distribution characteristics of the periodontal ligament were calculated under a thrust of 60 g.RESULTS AND CONCLUSION:(1)The maximum equivalent stress observed on the personalized orthodontic device was 47.71 MPa.(2)The initial tooth displacement under the device demonstrated a rotational trend.The peak equivalent stress in the periodontal ligament was concentrated at the neck,while lower stress was observed in the apex region.(3)The safety and feasibility of the personalized orthodontic device designed in this study for severely rotated single-rooted teeth were preliminarily verified through finite element analysis.

关 键 词：牙周膜 3D打印 个性化正畸装置 单根牙 旋转移动 三维有限元分析 口腔生物力学 

分 类 号：R496[医药卫生—康复医学] R318[医药卫生—临床医学] R783.5