中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (10): 1489-1495.doi: 10.3969/j.issn.2095-4344.1609

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

上颌尖牙在无托槽隐形矫治中伸长运动的三维有限元分析

田姗璨1,白 蕊2,徐晓梅2,黄 跃3,张 丽1,余星月1,程 钎2   

  1. 1西南医科大学口腔医学院,四川省泸州市 646000;2西南医科大学口腔医学院附属口腔医院正畸科,四川省泸州市 646000;3暨南大学附属口腔医院,广东省佛山市 528000
  • 收稿日期:2018-11-26 出版日期:2019-04-08 发布日期:2019-04-08
  • 通讯作者: 程钎,主治医师,西南医科大学附属口腔医院正畸科,四川省泸州市 646000
  • 作者简介:田姗璨,女,1995年生,四川省成都市人,西南医科大学在读硕士,主要从事口腔正畸临床与科研工作。
  • 基金资助:

    国家自然科学基金(81300903),项目负责人:黄跃

Three-dimensional finite element analysis of extrusion of the maxillary canine during orthodontic treatment with invisible aligner without brackets

Tian Shancan1, Bai Rui2, Xu Xiaomei2, Huang Yue3, Zhang Li1, Yu Xingyue1, Cheng Qian2   

  1. 1School of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China; 2Department of Orthodontics, Hospital of Stomatology, Southwest Medical University School of Stomatology, Luzhou 646000, Sichuan Province, China; 3Hospital of Stomatology, Jinan University, Foshan 528000, Guangdong Province, China
  • Received:2018-11-26 Online:2019-04-08 Published:2019-04-08
  • Contact: Cheng Qian, Attending physician, Department of Orthodontics, Hospital of Stomatology, Southwest Medical University School of Stomatology, Luzhou 646000, Sichuan Province, China
  • About author:Tian Shancan, Master candidate, School of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81300903 (to HY)

摘要:

文章快速阅读:

 

文题释义:
无托槽隐形矫治技术:是通过计算机三维数字模型的建立、诊断及矫治方案的设计和制造,利用一种透明弹性材料的弹性回复力对排列不齐的牙齿进行小范围的定向移动,最终达到矫正目的的一种矫正技术。
有限元分析:是利用数学近似方法对真实物理系统(几何和载荷工况)进行模拟。利用数学近似方法对隐形矫正器及附件进行模拟,从数字化实验中相对真实体现隐形矫治器通过附件将力作用于牙体组织的情况。
 
 
背景:随着科学技术的进步,无托槽隐形矫治技术应运而生,但对这种新型数字化矫治技术的生物力学研究较少。
目的:采用不同尺寸的矩形附件及不同粘接位置获得伸长运动时,分析尖牙及牙周支持组织的受力情况,为伸长尖牙时无托槽隐形矫治矩形附件的设计提供临床参考价值。
方法:利用离体尖牙扫描数据建立矫治器-附件-尖牙-牙周膜-松质骨-皮质骨的三维仿真实体模型,其中附件设置不同的方向(垂直、水平)、尺寸(高度3,4,5 mm)与位置(唇侧牙冠中心牙合方、唇侧牙冠中心龈方),加载牙合向0.25 mm强迫位移,观察牙体、牙周膜的形变及等效应力。

结果与结论:①矩形附件尺寸增加,牙齿受力在一定范围内增加,有更好的伸长效果,但伴有更大幅度的其他方向倾斜运动;②矩形附件位于牙冠唇侧龈方的伸长效果优于牙合方,水平附件的伸长效果优于垂直附件,更不容易发生近中倾斜,但易发生舌向倾斜。

ORCID: 0000-0002-5661-5077(田姗璨)

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程

关键词: 口腔材料, 无托槽隐形矫正, 尖牙, 伸长, 有限元分析, 生物材料

Abstract:

BACKGROUND: With the advancement of science and technology, invisible aligner without brackets have emerged. However, this new type of digital orthodontic technology is rarely reported on its biomechanics.

OBJECTIVE: By the use of rectangular attachments of different sizes and different bonding positions, to obtain different force of canines and the stress supporting of periodontal tissue during the extrusion movement, providing reference for the clinical use of rectangular attachment in the orthodontic treatment of low canine tooth.
METHODS: A three-dimensional finite element model of appliance-attachments-canine-periodontium-cancellous bone-cortical bone was established based on the scan data of the isolated canine. The attachments were set in different directions (vertical, horizontal), sizes (3, 4, 5 mm in height) and positions (in the occlusal side of the crown center, in the gingival side of the crown center). The 0.25-mm forced occlusal displacement was loaded to observe the deformation and equivalent stress of the tooth and periodontal membrane.

RESULTS AND CONCLUSION: (1) If the size of rectangular attachment increases, the force of the tooth will grow in a certain range and the tooth will have better effect of extrusion with a larger level of tilt motion in other directions. (2) The extrusion effect of the horizontal attachment is better than that of the vertical attachment, which is more difficult to have distal incline, but is prone to lingual incline.

 

Key words: Orthodontic Appliances, Finite Element Analysis, Cuspid, Tissue Engineering

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